{"id":2786,"date":"2025-01-02T15:38:00","date_gmt":"2025-01-02T15:38:00","guid":{"rendered":"https:\/\/blog.lebara.co.uk\/?p=2786"},"modified":"2025-02-07T15:53:25","modified_gmt":"2025-02-07T15:53:25","slug":"understanding-gsm-the-basics-explained","status":"publish","type":"post","link":"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/","title":{"rendered":"\u039a\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 GSM: \u0395\u03c0\u03b5\u03be\u03ae\u03b3\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ce\u03bd \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03c9\u03bd"},"content":{"rendered":"<p>\u038c\u03c4\u03b1\u03bd \u03c0\u03c1\u03cc\u03ba\u03b5\u03b9\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1, \u03b7 \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 GSM \u03ae \u03c4\u03bf\u03c5 \u03a0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03bf\u03c5 \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u039a\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u0395\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b7. \u0391\u03bb\u03bb\u03ac \u03c4\u03b9 \u03b1\u03ba\u03c1\u03b9\u03b2\u03ce\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf GSM; \u039c\u03b5 \u03b1\u03c0\u03bb\u03ac \u03bb\u03cc\u03b3\u03b9\u03b1, \u03c4\u03bf GSM \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf \u03c0\u03bf\u03c5 \u03b1\u03bd\u03b1\u03c0\u03c4\u03cd\u03c7\u03b8\u03b7\u03ba\u03b5 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03ac\u03c8\u03b5\u03b9 \u03c4\u03b1 \u03c0\u03c1\u03c9\u03c4\u03cc\u03ba\u03bf\u03bb\u03bb\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03ac \u03ba\u03c5\u03c8\u03b5\u03bb\u03bf\u03b5\u03b9\u03b4\u03ae \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03b7\u03c2 \u03b3\u03b5\u03bd\u03b9\u03ac\u03c2 \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ac \u03c4\u03b7\u03bb\u03ad\u03c6\u03c9\u03bd\u03b1. \u0391\u03bd\u03b1\u03c0\u03c4\u03cd\u03c7\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03b1 \u03c4\u03ad\u03bb\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b5\u03ba\u03b1\u03b5\u03c4\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 1980 \u03ba\u03b1\u03b9 \u03ad\u03c7\u03b5\u03b9 \u03b3\u03af\u03bd\u03b5\u03b9 \u03c4\u03bf \u03c0\u03b9\u03bf \u03b5\u03c5\u03c1\u03ad\u03c9\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2 \u03c0\u03b1\u03b3\u03ba\u03bf\u03c3\u03bc\u03af\u03c9\u03c2. \u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9, \u03b8\u03b1 \u03b5\u03bc\u03b2\u03b1\u03b8\u03cd\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03bf \u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf GSM, \u03c3\u03c4\u03b1 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c4\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c0\u03ce\u03c2 \u03ad\u03c6\u03b5\u03c1\u03b5 \u03b5\u03c0\u03b1\u03bd\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c3\u03c4\u03bf\u03bd \u03c4\u03c1\u03cc\u03c0\u03bf \u03bc\u03b5 \u03c4\u03bf\u03bd \u03bf\u03c0\u03bf\u03af\u03bf \u03c3\u03c5\u03bd\u03b4\u03b5\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03bc\u03b1\u03c2, \u03ba\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03c0\u03b9\u03bf \u03c0\u03c1\u03bf\u03c3\u03b9\u03c4\u03ae \u03ba\u03b1\u03b9 \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03b7 \u03b3\u03b9\u03b1 \u03cc\u03bb\u03bf\u03c5\u03c2.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u03a0\u03af\u03bd\u03b1\u03ba\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u0395\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03c0\u03af\u03bd\u03b1\u03ba\u03b1 \u03c0\u03b5\u03c1\u03b9\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u0395\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Introduction_to_GSM\" >\u0395\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c3\u03c4\u03bf GSM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#History_of_GSM_Development\" >\u0399\u03c3\u03c4\u03bf\u03c1\u03af\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7\u03c2 \u03c4\u03bf\u03c5 GSM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Importance_of_GSM_in_Modern_Communication\" >\u03a3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 GSM \u03c3\u03c4\u03b7 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Key_Features_of_GSM\" >\u0392\u03b1\u03c3\u03b9\u03ba\u03ac \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c4\u03bf\u03c5 GSM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Network_Architecture_Overview\" >\u0395\u03c0\u03b9\u03c3\u03ba\u03cc\u03c0\u03b7\u03c3\u03b7 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Advantages_of_GSM_Technology\" >\u03a0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 GSM<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#How_GSM_Works\" >\u03a0\u03ce\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03c4\u03bf GSM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Understanding_GSM_Frequencies\" >\u039a\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c3\u03c5\u03c7\u03bd\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd GSM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Role_of_SIM_Cards_in_GSM\" >\u039f \u03c1\u03cc\u03bb\u03bf\u03c2 \u03c4\u03c9\u03bd \u03ba\u03b1\u03c1\u03c4\u03ce\u03bd SIM \u03c3\u03c4\u03bf GSM<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Applications_of_GSM\" >\u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03bf\u03c5 GSM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Everyday_Uses_of_GSM\" >\u039a\u03b1\u03b8\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03ad\u03c2 \u03c7\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03bf\u03c5 GSM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#GSM_in_Business_and_Industry\" >\u03a4\u03bf GSM \u03c3\u03c4\u03b9\u03c2 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03af\u03b1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Future_of_GSM_Technology\" >\u03a4\u03bf \u03bc\u03ad\u03bb\u03bb\u03bf\u03bd \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 GSM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#Innovations_in_GSM_Networks\" >\u039a\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b5\u03c2 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 GSM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/#GSMs_Role_in_5G_and_Beyond\" >\u039f \u03c1\u03cc\u03bb\u03bf\u03c2 \u03c4\u03bf\u03c5 GSM \u03c3\u03c4\u03bf 5G \u03ba\u03b1\u03b9 \u03c0\u03ad\u03c1\u03b1\u03bd \u03b1\u03c5\u03c4\u03bf\u03cd<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Introduction_to_GSM\"><\/span>\u0395\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c3\u03c4\u03bf GSM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0393\u03b9\u03b1 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf\u03bd \u03c0\u03bb\u03ae\u03c1\u03b7 \u03b1\u03bd\u03c4\u03af\u03ba\u03c4\u03c5\u03c0\u03bf \u03c4\u03bf\u03c5 GSM, \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03bf \u03bd\u03b1 \u03b5\u03be\u03b5\u03c1\u03b5\u03c5\u03bd\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c1\u03af\u03b6\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c3\u03c4\u03bf\u03bd \u03c3\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03cc \u03ba\u03cc\u03c3\u03bc\u03bf. \u03a4\u03bf GSM, \u03c4\u03bf \u03a0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03bf \u03a3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u039a\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u0395\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd, \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c1\u03b1\u03c7\u03bf\u03ba\u03bf\u03ba\u03b1\u03bb\u03b9\u03ac \u03c4\u03c9\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd, \u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03bd \u03c4\u03c1\u03cc\u03c0\u03bf \u03bc\u03b5 \u03c4\u03bf\u03bd \u03bf\u03c0\u03bf\u03af\u03bf \u03c3\u03c5\u03bd\u03b4\u03b5\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03bf\u03cd\u03bc\u03b5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"History_of_GSM_Development\"><\/span>\u0399\u03c3\u03c4\u03bf\u03c1\u03af\u03b1 \u03c4\u03b7\u03c2 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7\u03c2 \u03c4\u03bf\u03c5 GSM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u03a4\u03bf <strong>\u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03c4\u03bf\u03c5 GSM<\/strong> \u03c7\u03c1\u03bf\u03bd\u03bf\u03bb\u03bf\u03b3\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03b5\u03ba\u03b1\u03b5\u03c4\u03af\u03b1 \u03c4\u03bf\u03c5 1980, \u03bc\u03b9\u03b1 \u03ba\u03bf\u03bc\u03b2\u03b9\u03ba\u03ae \u03b5\u03c0\u03bf\u03c7\u03ae \u03c3\u03c4\u03b9\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b5\u03c2. \u039e\u03b5\u03ba\u03af\u03bd\u03b7\u03c3\u03b5 \u03bc\u03b5 \u03c4\u03b7 \u03c3\u03c5\u03b3\u03ba\u03c1\u03cc\u03c4\u03b7\u03c3\u03b7 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u0395\u03c5\u03c1\u03c9\u03c0\u03b1\u03ca\u03ba\u03ae \u0394\u03b9\u03ac\u03c3\u03ba\u03b5\u03c8\u03b7 \u03c4\u03c9\u03bd \u03a4\u03b1\u03c7\u03c5\u03b4\u03c1\u03bf\u03bc\u03b9\u03ba\u03ce\u03bd \u03ba\u03b1\u03b9 \u03a4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03ce\u03bd \u0394\u03b9\u03bf\u03b9\u03ba\u03ae\u03c3\u03b5\u03c9\u03bd (CEPT) \u03bc\u03b9\u03b1\u03c2 \u03bf\u03bc\u03ac\u03b4\u03b1\u03c2 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03b5\u03bd\u03b9\u03b1\u03af\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2. \u039c\u03ad\u03c7\u03c1\u03b9 \u03c4\u03bf 1987, \u03c4\u03bf \u039c\u03bd\u03b7\u03bc\u03cc\u03bd\u03b9\u03bf \u03a3\u03c5\u03bd\u03b1\u03bd\u03c4\u03af\u03bb\u03b7\u03c8\u03b7\u03c2 (MoU) \u03b3\u03b9\u03b1 \u03c4\u03bf GSM \u03b5\u03af\u03c7\u03b5 \u03c5\u03c0\u03bf\u03b3\u03c1\u03b1\u03c6\u03b5\u03af \u03b1\u03c0\u03cc 13 \u03c7\u03ce\u03c1\u03b5\u03c2. \u0391\u03c5\u03c4\u03cc \u03c3\u03b7\u03bc\u03b1\u03c4\u03bf\u03b4\u03cc\u03c4\u03b7\u03c3\u03b5 \u03c4\u03b7 \u03bc\u03b5\u03c4\u03ac\u03b2\u03b1\u03c3\u03b7 \u03b1\u03c0\u03cc \u03c4\u03bf \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03b9\u03ba\u03cc \u03c3\u03c4\u03bf \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03cc, \u03c6\u03ad\u03c1\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b5\u03c0\u03b1\u03bd\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b9\u03c2 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ad\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b5\u03c2.<\/p>\n\n\n\n<p>\u03a4\u03bf 1991, \u03b7 \u03c0\u03c1\u03ce\u03c4\u03b7 \u03ba\u03bb\u03ae\u03c3\u03b7 GSM \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c3\u03c4\u03b7 \u03a6\u03b9\u03bd\u03bb\u03b1\u03bd\u03b4\u03af\u03b1, \u03b1\u03bd\u03b1\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b9\u03c2 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03ad\u03c2 \u03c4\u03bf\u03c5. \u03a4\u03bf \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03b5\u03c0\u03b5\u03ba\u03c4\u03ac\u03b8\u03b7\u03ba\u03b5 \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b1 \u03c3\u03b5 \u03cc\u03bb\u03b7 \u03c4\u03b7\u03bd \u0395\u03c5\u03c1\u03ce\u03c0\u03b7 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03c0\u03b1\u03b3\u03ba\u03bf\u03c3\u03bc\u03af\u03c9\u03c2, \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1. \u0397 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03c4\u03bf\u03c5 GSM \u03ad\u03b8\u03b5\u03c3\u03b5 \u03c4\u03b9\u03c2 \u03b2\u03ac\u03c3\u03b5\u03b9\u03c2 \u03b3\u03b9\u03b1 \u03bc\u03b5\u03bb\u03bb\u03bf\u03bd\u03c4\u03b9\u03ba\u03ad\u03c2 \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b5\u03c2, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b1\u03c0\u03c1\u03cc\u03c3\u03ba\u03bf\u03c0\u03c4\u03b7 <a href=\"https:\/\/blog.lebara.co.uk\/el\/how-to-cut-the-cost-of-international-calls-on-a-mobile-phone\/\">\u03b4\u03b9\u03b5\u03b8\u03bd\u03ad\u03c2<\/a> \u03c0\u03b5\u03c1\u03b9\u03b1\u03b3\u03c9\u03b3\u03ae \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bd\u03ad\u03c0\u03b5\u03b9\u03b1 <a href=\"https:\/\/blog.lebara.co.uk\/el\/how-to-find-out-what-network-youre-on\/\">\u03b4\u03af\u03ba\u03c4\u03c5\u03bf<\/a> \u03c0\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1.<\/p>\n\n\n\n<p>\u03a3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03ac \u03bf\u03c1\u03cc\u03c3\u03b7\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03af\u03b4\u03c1\u03c5\u03c3\u03b7 \u03c4\u03b7\u03c2 \u0388\u03bd\u03c9\u03c3\u03b7\u03c2 GSM \u03c4\u03bf 1995 \u03ba\u03b1\u03b9 \u03b7 \u03bc\u03b5\u03c4\u03ac\u03b2\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 3G. \u039a\u03ac\u03b8\u03b5 \u03b2\u03ae\u03bc\u03b1 \u03c5\u03c0\u03bf\u03b3\u03c1\u03ac\u03bc\u03bc\u03b9\u03b6\u03b5 \u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03c3\u03b1\u03c1\u03bc\u03bf\u03c3\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 GSM \u03ba\u03b1\u03b9 \u03c4\u03bf\u03bd \u03c1\u03cc\u03bb\u03bf \u03c4\u03bf\u03c5 \u03c9\u03c2 \u03b8\u03b5\u03bc\u03ad\u03bb\u03b9\u03bf \u03c4\u03b7\u03c2 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Importance_of_GSM_in_Modern_Communication\"><\/span>\u03a3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 GSM \u03c3\u03c4\u03b7 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>GSM <strong>\u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c3\u03c4\u03b7 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1<\/strong> \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c5\u03c0\u03b5\u03c1\u03c4\u03b9\u03bc\u03b7\u03b8\u03b5\u03af. \u0394\u03b9\u03b5\u03c5\u03ba\u03cc\u03bb\u03c5\u03bd\u03b5 \u03bc\u03b9\u03b1 \u03c4\u03c5\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c4\u03c9\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u03c4\u03b7\u03bb\u03b5\u03c6\u03ce\u03bd\u03c9\u03bd \u03c3\u03b5 \u03cc\u03bb\u03bf \u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf. \u0391\u03c5\u03c4\u03ae \u03b7 \u03c0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03b1 \u03c4\u03c5\u03c0\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03ac\u03bb\u03bb\u03b1\u03be\u03b5 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1, \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7 \u03c3\u03c5\u03bc\u03b2\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03b4\u03b9\u03b1\u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ce\u03bd \u03c0\u03b1\u03c1\u03cc\u03c7\u03c9\u03bd \u03b4\u03b9\u03ba\u03c4\u03cd\u03c9\u03bd.<\/p>\n\n\n\n<p>\u03a4\u03bf GSM \u03b5\u03c0\u03ad\u03c4\u03c1\u03b5\u03c8\u03b5 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03b1\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ae \u03b3\u03c1\u03b1\u03c0\u03c4\u03ce\u03bd \u03bc\u03b7\u03bd\u03c5\u03bc\u03ac\u03c4\u03c9\u03bd (SMS), \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03ad\u03b3\u03b9\u03bd\u03b5 \u03c0\u03bf\u03bb\u03b9\u03c4\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc \u03c6\u03b1\u03b9\u03bd\u03cc\u03bc\u03b5\u03bd\u03bf. \u0397 \u03b5\u03b9\u03c3\u03b1\u03b3\u03c9\u03b3\u03ae \u03c4\u03c9\u03bd \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 GSM \u03ac\u03bd\u03bf\u03b9\u03be\u03b5 \u03c4\u03bf \u03b4\u03c1\u03cc\u03bc\u03bf \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ba\u03b9\u03bd\u03b7\u03c4\u03cc \u03b4\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf, \u03b1\u03bb\u03bb\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c1\u03b9\u03b6\u03b9\u03ba\u03ac \u03c4\u03bf\u03bd \u03c4\u03c1\u03cc\u03c0\u03bf \u03bc\u03b5 \u03c4\u03bf\u03bd \u03bf\u03c0\u03bf\u03af\u03bf \u03bf\u03b9 \u03ac\u03bd\u03b8\u03c1\u03c9\u03c0\u03bf\u03b9 \u03ad\u03c7\u03bf\u03c5\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03b5 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03bf\u03cd\u03bd.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03c4\u03b1 \u03b9\u03c3\u03c7\u03c5\u03c1\u03ac \u03c0\u03c1\u03c9\u03c4\u03cc\u03ba\u03bf\u03bb\u03bb\u03b1 \u03b1\u03c3\u03c6\u03b1\u03bb\u03b5\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 GSM \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b5\u03cd\u03bf\u03c5\u03bd \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c9\u03bd \u03c7\u03c1\u03b7\u03c3\u03c4\u03ce\u03bd, \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03bd\u03c4\u03b1\u03c2 \u03ad\u03bd\u03b1 \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03bf \u03ba\u03b1\u03bd\u03ac\u03bb\u03b9 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf \u03ad\u03c7\u03b5\u03b9 \u03b3\u03af\u03bd\u03b5\u03b9 \u03b7 \u03c1\u03b1\u03c7\u03bf\u03ba\u03bf\u03ba\u03b1\u03bb\u03b9\u03ac \u03c4\u03b7\u03c2 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2, \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b4\u03b9\u03c3\u03b5\u03ba\u03b1\u03c4\u03bf\u03bc\u03bc\u03cd\u03c1\u03b9\u03b1 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03c0\u03b1\u03b3\u03ba\u03bf\u03c3\u03bc\u03af\u03c9\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03bf \u03c4\u03cc\u03c3\u03bf \u03c3\u03b5 \u03c0\u03c1\u03bf\u03c3\u03c9\u03c0\u03b9\u03ba\u03ac \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03c3\u03b5 \u03b5\u03c0\u03b1\u03b3\u03b3\u03b5\u03bb\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03b1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Key_Features_of_GSM\"><\/span>\u0392\u03b1\u03c3\u03b9\u03ba\u03ac \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c4\u03bf\u03c5 GSM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u03a4\u03bf GSM \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b1 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c0\u03bf\u03c5 \u03c4\u03bf \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd \u03ad\u03bd\u03b1 \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03bf \u03ba\u03b1\u03b9 \u03b5\u03c5\u03ad\u03bb\u03b9\u03ba\u03c4\u03bf \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2. \u03a4\u03b1 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03b1\u03c5\u03c4\u03ac \u03ad\u03c7\u03bf\u03c5\u03bd \u03c3\u03c5\u03bc\u03b2\u03ac\u03bb\u03b5\u03b9 \u03c3\u03c4\u03b7 \u03b4\u03b9\u03b1\u03c1\u03ba\u03ae \u03b4\u03b7\u03bc\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03ac \u03c4\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c5\u03c1\u03b5\u03af\u03b1 \u03c5\u03b9\u03bf\u03b8\u03ad\u03c4\u03b7\u03c3\u03ae \u03c4\u03bf\u03c5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Network_Architecture_Overview\"><\/span>\u0395\u03c0\u03b9\u03c3\u03ba\u03cc\u03c0\u03b7\u03c3\u03b7 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae\u03c2 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u03a4\u03bf <strong>\u0391\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 GSM<\/strong> \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03bf\u03bb\u03b1\u03c3\u03c4\u03b9\u03ba\u03ac \u03bf\u03c1\u03b3\u03b1\u03bd\u03c9\u03bc\u03ad\u03bd\u03b7 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03c3\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1. \u03a0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b1 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u039a\u03b9\u03bd\u03b7\u03c4\u03cc\u03c2 \u03c3\u03c4\u03b1\u03b8\u03bc\u03cc\u03c2 (MS):<\/strong> \u0397 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ae \u03c4\u03bf\u03c5 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03c3\u03c5\u03bd\u03b4\u03ad\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03b4\u03af\u03ba\u03c4\u03c5\u03bf.<\/li>\n\n\n\n<li><strong>\u03a5\u03c0\u03bf\u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03c3\u03c4\u03b1\u03b8\u03bc\u03bf\u03cd \u03b2\u03ac\u03c3\u03b7\u03c2 (BSS):<\/strong> \u0395\u03bb\u03ad\u03b3\u03c7\u03b5\u03b9 \u03c4\u03b7 \u03c1\u03b1\u03b4\u03b9\u03bf\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5 \u03ba\u03b9\u03bd\u03b7\u03c4\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5.<\/li>\n\n\n\n<li><strong>\u03a5\u03c0\u03bf\u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03bc\u03b5\u03c4\u03b1\u03b3\u03c9\u03b3\u03ae\u03c2 (NSS):<\/strong> \u0394\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7 \u03b4\u03c1\u03bf\u03bc\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03ba\u03bb\u03ae\u03c3\u03b5\u03c9\u03bd \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03b5\u03af \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c9\u03bd \u03c7\u03c1\u03b7\u03c3\u03c4\u03ce\u03bd.<\/li>\n\n\n\n<li><strong>\u03a5\u03c0\u03bf\u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c5\u03c0\u03bf\u03c3\u03c4\u03ae\u03c1\u03b9\u03be\u03b7\u03c2 (OSS):<\/strong> \u03a0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03b5\u03af \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03bf \u03b4\u03af\u03ba\u03c4\u03c5\u03bf.<\/li>\n<\/ol>\n\n\n\n<p>\u0391\u03c5\u03c4\u03ae \u03b7 \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03c1\u03cc\u03c3\u03ba\u03bf\u03c0\u03c4\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03c9\u03bd \u03b4\u03b9\u03b1\u03c6\u03cc\u03c1\u03c9\u03bd \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03c9\u03bd, \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03bf\u03c7\u03ae \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03c9\u03bd \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd. \u039f \u03ba\u03b1\u03c4\u03b1\u03bc\u03b5\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2 \u03c4\u03c9\u03bd \u03ba\u03b1\u03b8\u03b7\u03ba\u03cc\u03bd\u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b1\u03c5\u03c4\u03ce\u03bd \u03c4\u03c9\u03bd \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03c9\u03bd \u03b2\u03b5\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03c4\u03b7\u03bd \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b5\u03bc\u03c0\u03b5\u03b9\u03c1\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7.<\/p>\n\n\n\n<p>\u0397 \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03b1\u03c5\u03c4\u03ae\u03c2 \u03c4\u03b7\u03c2 \u03b4\u03bf\u03bc\u03ae\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b6\u03c9\u03c4\u03b9\u03ba\u03ae\u03c2 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c4\u03c1\u03cc\u03c0\u03bf\u03c5 \u03bc\u03b5 \u03c4\u03bf\u03bd \u03bf\u03c0\u03bf\u03af\u03bf \u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 GSM \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03bf\u03cd\u03bd \u03c4\u03b7 \u03c3\u03c5\u03bd\u03b4\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03ad\u03bd\u03b1 \u03b5\u03c5\u03c1\u03cd \u03c6\u03ac\u03c3\u03bc\u03b1 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Advantages_of_GSM_Technology\"><\/span>\u03a0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 GSM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0397 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1 GSM \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03b5\u03b9 \u03c0\u03bf\u03bb\u03c5\u03ac\u03c1\u03b9\u03b8\u03bc\u03b1 \u03c0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03ad\u03c7\u03bf\u03c5\u03bd \u03b5\u03b4\u03c1\u03b1\u03b9\u03ce\u03c3\u03b5\u03b9 \u03c4\u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c3\u03c4\u03b7\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1. \u0388\u03bd\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03c0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03ac \u03c4\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 <strong>\u03b4\u03b9\u03b5\u03b8\u03bd\u03ae \u03c0\u03b5\u03c1\u03b9\u03b1\u03b3\u03c9\u03b3\u03ae<\/strong>, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03bd\u03b1 \u03c4\u03b1\u03be\u03b9\u03b4\u03b5\u03cd\u03bf\u03c5\u03bd \u03c0\u03ad\u03c1\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c3\u03cd\u03bd\u03bf\u03c1\u03b1 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7 \u03c3\u03c5\u03bd\u03b4\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1. \u0391\u03c5\u03c4\u03ae \u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03ad\u03c7\u03b5\u03b9 \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03b5\u03af \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03b5\u03c0\u03b1\u03b3\u03b3\u03b5\u03bb\u03bc\u03b1\u03c4\u03af\u03b5\u03c2 \u03c4\u03b1\u03be\u03b9\u03b4\u03b9\u03ce\u03c4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5\u03c2 \u03c4\u03bf\u03c5\u03c1\u03af\u03c3\u03c4\u03b5\u03c2.<\/p>\n\n\n\n<p>\u0388\u03bd\u03b1 \u03ac\u03bb\u03bb\u03bf \u03c0\u03bb\u03b5\u03bf\u03bd\u03ad\u03ba\u03c4\u03b7\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 <strong>\u03b1\u03be\u03b9\u03bf\u03c0\u03b9\u03c3\u03c4\u03af\u03b1 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/strong>. \u03a4\u03bf GSM \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03c0\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd, \u03b1\u03ba\u03cc\u03bc\u03b7 \u03ba\u03b1\u03b9 \u03c3\u03b5 \u03b1\u03c0\u03bf\u03bc\u03b1\u03ba\u03c1\u03c5\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c7\u03ad\u03c2. \u0397 \u03c8\u03b7\u03c6\u03b9\u03b1\u03ba\u03ae \u03c4\u03bf\u03c5 \u03c6\u03cd\u03c3\u03b7 \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03b5\u03b9 \u03ba\u03b1\u03b8\u03b1\u03c1\u03ad\u03c2 \u03c6\u03c9\u03bd\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03ba\u03bb\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b7 \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03c4\u03bf GSM \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b5\u03c5\u03c1\u03cd \u03c6\u03ac\u03c3\u03bc\u03b1 \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ce\u03bd, \u03b1\u03c0\u03cc \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ad\u03c2 \u03ad\u03c9\u03c2 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bc\u03ad\u03bd\u03b1 smartphones, \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c0\u03c1\u03bf\u03c3\u03b9\u03c4\u03cc \u03c3\u03b5 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2. \u03a4\u03b1 \u03bc\u03ad\u03c4\u03c1\u03b1 \u03b1\u03c3\u03c6\u03b1\u03bb\u03b5\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c4\u03cd\u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b5\u03cd\u03bf\u03c5\u03bd \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1, \u03c3\u03c5\u03bc\u03b2\u03ac\u03bb\u03bb\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c5\u03c1\u03b5\u03af\u03b1 \u03c5\u03b9\u03bf\u03b8\u03ad\u03c4\u03b7\u03c3\u03ae \u03c4\u03bf\u03c5.<\/p>\n\n\n\n<p>\u03a4\u03b1 \u03c0\u03bb\u03b5\u03bf\u03bd\u03b5\u03ba\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b1\u03c5\u03c4\u03ac \u03ba\u03b1\u03c4\u03b1\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03bf\u03c5\u03bd \u03b3\u03b9\u03b1\u03c4\u03af \u03c4\u03bf GSM \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03bd\u03b5\u03b9 \u03ba\u03c5\u03c1\u03af\u03b1\u03c1\u03c7\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c3\u03c4\u03b9\u03c2 \u03c0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03b5\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b5\u03c2.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"How_GSM_Works\"><\/span>\u03a0\u03ce\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03c4\u03bf GSM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0397 \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 GSM \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7 \u03b4\u03b9\u03b5\u03c1\u03b5\u03cd\u03bd\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c4\u03b5\u03c7\u03bd\u03b9\u03ba\u03ce\u03bd \u03c0\u03c4\u03c5\u03c7\u03ce\u03bd \u03c4\u03bf\u03c5, \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03ad\u03c9\u03c2 \u03c4\u03b9\u03c2 <a href=\"https:\/\/blog.lebara.co.uk\/el\/a-beginners-guide-to-sim-cards\/\">\u039a\u03ac\u03c1\u03c4\u03b5\u03c2 SIM<\/a>. \u0391\u03c5\u03c4\u03ac \u03c4\u03b1 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03c3\u03c5\u03bd\u03b5\u03c1\u03b3\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03b1\u03c0\u03c1\u03cc\u03c3\u03ba\u03bf\u03c0\u03c4\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Understanding_GSM_Frequencies\"><\/span>\u039a\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c3\u03c5\u03c7\u03bd\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd GSM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>\u03a3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 GSM<\/strong> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b6\u03c9\u03c4\u03b9\u03ba\u03ae\u03c2 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03be\u03b1\u03c3\u03c6\u03ac\u03bb\u03b9\u03c3\u03b7 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2. \u03a4\u03bf \u03c3\u03cd\u03c3\u03c4\u03b7\u03bc\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03c3\u03b5 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b5\u03c2 \u03b6\u03ce\u03bd\u03b5\u03c2 \u03c3\u03c5\u03c7\u03bd\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd, \u03ba\u03c5\u03c1\u03af\u03c9\u03c2 900MHz \u03ba\u03b1\u03b9 1800MHz \u03c3\u03c4\u03b7\u03bd \u0395\u03c5\u03c1\u03ce\u03c0\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u0391\u03c3\u03af\u03b1 \u03ba\u03b1\u03b9 850MHz \u03ba\u03b1\u03b9 1900MHz \u03c3\u03c4\u03b7\u03bd \u0391\u03bc\u03b5\u03c1\u03b9\u03ba\u03ae.<\/p>\n\n\n\n<p>\u0391\u03c5\u03c4\u03ad\u03c2 \u03bf\u03b9 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03c3\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 <a href=\"https:\/\/blog.lebara.co.uk\/el\/boosting-your-mobile-signal-tips-for-improving-reception\/\">\u03c5\u03c0\u03bf\u03b4\u03bf\u03c7\u03ae<\/a>, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b5\u03c5\u03c1\u03b5\u03af\u03b1 \u03ba\u03ac\u03bb\u03c5\u03c8\u03b7. \u0397 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ce\u03bd \u03b6\u03c9\u03bd\u03ce\u03bd \u03b1\u03c0\u03bf\u03c6\u03b5\u03cd\u03b3\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03c0\u03b1\u03c1\u03b5\u03bc\u03b2\u03bf\u03bb\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03b5\u03b9 \u03ba\u03b1\u03b8\u03b1\u03c1\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1.<\/p>\n\n\n\n<p>\u0397 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03bf\u03c5 GSM <strong>\u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ae \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03bc\u03b5 \u03b4\u03b9\u03b1\u03af\u03c1\u03b5\u03c3\u03b7 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 (FDMA)<\/strong> \u03ba\u03b1\u03b9 <strong>\u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ae \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03bc\u03b5 \u03b4\u03b9\u03b1\u03af\u03c1\u03b5\u03c3\u03b7 \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5 (TDMA)<\/strong> \u03b2\u03b5\u03bb\u03c4\u03b9\u03c3\u03c4\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03c4\u03bf \u03b4\u03b9\u03b1\u03b8\u03ad\u03c3\u03b9\u03bc\u03bf \u03c6\u03ac\u03c3\u03bc\u03b1. \u03a4\u03bf FDMA \u03b4\u03b9\u03b1\u03b9\u03c1\u03b5\u03af \u03c4\u03bf \u03c6\u03ac\u03c3\u03bc\u03b1 \u03c3\u03b5 \u03ba\u03b1\u03bd\u03ac\u03bb\u03b9\u03b1, \u03b5\u03bd\u03ce \u03c4\u03bf TDMA \u03b4\u03b9\u03b1\u03b9\u03c1\u03b5\u03af \u03c4\u03b1 \u03ba\u03b1\u03bd\u03ac\u03bb\u03b9\u03b1 \u03b1\u03c5\u03c4\u03ac \u03c3\u03b5 \u03c7\u03c1\u03bf\u03bd\u03bf\u03b8\u03c5\u03c1\u03af\u03b4\u03b5\u03c2, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03b5 \u03c0\u03bf\u03bb\u03bb\u03bf\u03cd\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03bd\u03b1 \u03bc\u03bf\u03b9\u03c1\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b1 \u03c4\u03b7\u03bd \u03af\u03b4\u03b9\u03b1 \u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1.<\/p>\n\n\n\n<p>\u0397 \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03b1\u03c5\u03c4\u03ce\u03bd \u03c4\u03c9\u03bd \u03c3\u03c5\u03c7\u03bd\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03bf\u03c5\u03c2 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03ba\u03c4\u03af\u03bc\u03b7\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c4\u03bf\u03c5 GSM \u03cc\u03c3\u03bf\u03bd \u03b1\u03c6\u03bf\u03c1\u03ac \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c4\u03ae\u03c1\u03b7\u03c3\u03b7 \u03b9\u03c3\u03c7\u03c5\u03c1\u03ce\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ce\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Role_of_SIM_Cards_in_GSM\"><\/span>\u039f \u03c1\u03cc\u03bb\u03bf\u03c2 \u03c4\u03c9\u03bd \u03ba\u03b1\u03c1\u03c4\u03ce\u03bd SIM \u03c3\u03c4\u03bf GSM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>\u039a\u03ac\u03c1\u03c4\u03b5\u03c2 SIM<\/strong> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bd\u03b1\u03c0\u03cc\u03c3\u03c0\u03b1\u03c3\u03c4\u03bf \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03bf \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 GSM, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03c9\u03c2 \u03ba\u03bb\u03b5\u03b9\u03b4\u03af \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03c4\u03bf \u03b4\u03af\u03ba\u03c4\u03c5\u03bf. \u0391\u03c5\u03c4\u03ad\u03c2 \u03bf\u03b9 \u03bc\u03b9\u03ba\u03c1\u03ad\u03c2 \u03ba\u03ac\u03c1\u03c4\u03b5\u03c2 \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03bf\u03c5\u03bd \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 \u03c3\u03c5\u03bd\u03b4\u03c1\u03bf\u03bc\u03b7\u03c4\u03ce\u03bd, \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03b1\u03bd\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03b9\u03ba\u03ce\u03bd \u03b1\u03c1\u03b9\u03b8\u03bc\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c1\u03c5\u03b8\u03bc\u03af\u03c3\u03b5\u03c9\u03bd \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03bd\u03b1 <a href=\"https:\/\/blog.lebara.co.uk\/el\/6-reasons-to-switch-to-lebara-in-2023\/\">\u03b4\u03b9\u03b1\u03ba\u03cc\u03c0\u03c4\u03b7\u03c2<\/a> \u03b1\u03ba\u03bf\u03c5\u03c3\u03c4\u03b9\u03ba\u03ac \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03c4\u03b1\u03c5\u03c4\u03cc\u03c4\u03b7\u03c4\u03ac \u03c4\u03bf\u03c5\u03c2.<\/p>\n\n\n\n<p>\u039f \u03c1\u03cc\u03bb\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03ba\u03ac\u03c1\u03c4\u03b1\u03c2 SIM \u03b5\u03c0\u03b5\u03ba\u03c4\u03b5\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 <strong>\u03b1\u03c5\u03b8\u03b5\u03bd\u03c4\u03b9\u03ba\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03ba\u03c1\u03c5\u03c0\u03c4\u03bf\u03b3\u03c1\u03ac\u03c6\u03b7\u03c3\u03b7<\/strong>, \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b5\u03cd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c4\u03c9\u03bd \u03c7\u03c1\u03b7\u03c3\u03c4\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c3\u03c6\u03b1\u03bb\u03ae \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1. \u03a0\u03b5\u03c1\u03b9\u03ad\u03c7\u03b5\u03b9 \u03c4\u03b7 \u03b4\u03b9\u03b5\u03b8\u03bd\u03ae \u03c4\u03b1\u03c5\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c3\u03c5\u03bd\u03b4\u03c1\u03bf\u03bc\u03b7\u03c4\u03ae \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2 (IMSI) \u03ba\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03bc\u03bf\u03bd\u03b1\u03b4\u03b9\u03ba\u03cc \u03ba\u03bb\u03b5\u03b9\u03b4\u03af \u03b5\u03bb\u03ad\u03b3\u03c7\u03bf\u03c5 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2, \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b1\u03bb\u03ae\u03b8\u03b5\u03c5\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b4\u03c1\u03bf\u03bc\u03b7\u03c4\u03ae \u03c3\u03c4\u03bf \u03b4\u03af\u03ba\u03c4\u03c5\u03bf.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03bf\u03b9 \u03ba\u03ac\u03c1\u03c4\u03b5\u03c2 SIM \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03c5\u03bd <strong>\u03c0\u03b5\u03c1\u03b9\u03b1\u03b3\u03c9\u03b3\u03ae<\/strong>, \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03bd\u03b1 \u03c3\u03c5\u03bd\u03b4\u03ad\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03c1\u03cc\u03c3\u03ba\u03bf\u03c0\u03c4\u03b1 \u03c3\u03b5 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ac \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 \u03cc\u03c4\u03b1\u03bd \u03c4\u03b1\u03be\u03b9\u03b4\u03b5\u03cd\u03bf\u03c5\u03bd. \u0397 \u03c6\u03bf\u03c1\u03b7\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b7 \u03b5\u03c5\u03b5\u03bb\u03b9\u03be\u03af\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03c4\u03b1 \u03ad\u03c7\u03bf\u03c5\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03b5\u03b9 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b5\u03c2 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03bf \u03c4\u03bf\u03c5 \u03bf\u03b9\u03ba\u03bf\u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 GSM.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Applications_of_GSM\"><\/span>\u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03bf\u03c5 GSM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u039f\u03b9 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03bf\u03c5 GSM \u03b5\u03ba\u03c4\u03b5\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c0\u03bf\u03bb\u03cd \u03c0\u03ad\u03c1\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03b1\u03c0\u03bb\u03ad\u03c2 \u03c6\u03c9\u03bd\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03ba\u03bb\u03ae\u03c3\u03b5\u03b9\u03c2, \u03b5\u03c0\u03b7\u03c1\u03b5\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b5\u03c2 \u03c0\u03c4\u03c5\u03c7\u03ad\u03c2 \u03c4\u03b7\u03c2 \u03ba\u03b1\u03b8\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03ae\u03c2 \u03b6\u03c9\u03ae\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03af\u03b1\u03c2. \u0397 \u03b5\u03c5\u03b5\u03bb\u03b9\u03be\u03af\u03b1 \u03ba\u03b1\u03b9 \u03b7 \u03b1\u03be\u03b9\u03bf\u03c0\u03b9\u03c3\u03c4\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03bf \u03ba\u03b1\u03b8\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd \u03b1\u03ba\u03c1\u03bf\u03b3\u03c9\u03bd\u03b9\u03b1\u03af\u03bf \u03bb\u03af\u03b8\u03bf \u03c4\u03b7\u03c2 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Everyday_Uses_of_GSM\"><\/span>\u039a\u03b1\u03b8\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03ad\u03c2 \u03c7\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03bf\u03c5 GSM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u03a3\u03c4\u03b7\u03bd \u03ba\u03b1\u03b8\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03ae \u03b6\u03c9\u03ae, <strong>\u03a4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1 GSM<\/strong> \u03c0\u03b1\u03af\u03b6\u03b5\u03b9 \u03ba\u03b1\u03b8\u03bf\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc \u03c1\u03cc\u03bb\u03bf. \u03a0\u03ad\u03c1\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03b9\u03ba\u03ce\u03bd \u03ba\u03bb\u03ae\u03c3\u03b5\u03c9\u03bd, \u03c4\u03bf GSM \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ae \u03bc\u03b7\u03bd\u03c5\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5, \u03bc\u03b9\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c0\u03bf\u03c5 \u03ad\u03c6\u03b5\u03c1\u03b5 \u03b5\u03c0\u03b1\u03bd\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1, \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03bf\u03bd\u03c4\u03b1\u03c2 \u03ad\u03bd\u03b1\u03bd \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03bf \u03ba\u03b1\u03b9 \u03b2\u03bf\u03bb\u03b9\u03ba\u03cc \u03c4\u03c1\u03cc\u03c0\u03bf \u03b1\u03bd\u03c4\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03b9\u03ce\u03bd.<\/p>\n\n\n\n<p>\u0397 \u03c5\u03c0\u03bf\u03c3\u03c4\u03ae\u03c1\u03b9\u03be\u03b7 \u03c4\u03bf\u03c5 GSM \u03b3\u03b9\u03b1 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c3\u03c4\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03bd\u03b1 \u03c0\u03b5\u03c1\u03b9\u03b7\u03b3\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf, \u03bd\u03b1 \u03b5\u03bb\u03ad\u03b3\u03c7\u03bf\u03c5\u03bd \u03bc\u03b7\u03bd\u03cd\u03bc\u03b1\u03c4\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u03b9\u03ba\u03bf\u03cd \u03c4\u03b1\u03c7\u03c5\u03b4\u03c1\u03bf\u03bc\u03b5\u03af\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03c0\u03bb\u03b1\u03c4\u03c6\u03cc\u03c1\u03bc\u03b5\u03c2 \u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ba\u03ae\u03c2 \u03b4\u03b9\u03ba\u03c4\u03cd\u03c9\u03c3\u03b7\u03c2 \u03b5\u03bd \u03ba\u03b9\u03bd\u03ae\u03c3\u03b5\u03b9. \u0391\u03c5\u03c4\u03ae \u03b7 \u03c3\u03c5\u03bd\u03b4\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c4\u03b5\u03af \u03ad\u03bd\u03b1 \u03b5\u03c5\u03c1\u03cd \u03c6\u03ac\u03c3\u03bc\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c6\u03c9\u03bd\u03af\u03b1\u03c2, \u03b1\u03c0\u03cc \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03b1 \u03c0\u03bb\u03bf\u03ae\u03b3\u03b7\u03c3\u03b7\u03c2 \u03ad\u03c9\u03c2 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b5\u03c2 streaming, \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03ba\u03b1\u03b8\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03ae \u03b6\u03c9\u03ae.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03c4\u03bf GSM \u03b4\u03b9\u03b5\u03c5\u03ba\u03bf\u03bb\u03cd\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae \u03c4\u03c1\u03b1\u03c0\u03b5\u03b6\u03b9\u03ba\u03ae \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03b1\u03bd\u03ad\u03c0\u03b1\u03c6\u03b5\u03c2 \u03c0\u03bb\u03b7\u03c1\u03c9\u03bc\u03ad\u03c2, \u03bc\u03b5\u03c4\u03b1\u03bc\u03bf\u03c1\u03c6\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03bd \u03c4\u03c1\u03cc\u03c0\u03bf \u03bc\u03b5 \u03c4\u03bf\u03bd \u03bf\u03c0\u03bf\u03af\u03bf \u03bf\u03b9 \u03ac\u03bd\u03b8\u03c1\u03c9\u03c0\u03bf\u03b9 \u03b4\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c4\u03b1 \u03bf\u03b9\u03ba\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ac \u03c4\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03c3\u03c5\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ad\u03c2. \u0397 \u03c0\u03b1\u03bd\u03c4\u03b1\u03c7\u03bf\u03cd \u03c0\u03b1\u03c1\u03bf\u03cd\u03c3\u03b1 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c5\u03c0\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03af\u03b6\u03b5\u03b9 \u03c4\u03bf\u03bd \u03b1\u03bd\u03c4\u03af\u03ba\u03c4\u03c5\u03c0\u03cc \u03c4\u03bf\u03c5 \u03c3\u03c4\u03b9\u03c2 \u03ba\u03b1\u03b8\u03b7\u03bc\u03b5\u03c1\u03b9\u03bd\u03ad\u03c2 \u03b4\u03c1\u03b1\u03c3\u03c4\u03b7\u03c1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2, \u03b5\u03be\u03bf\u03c1\u03b8\u03bf\u03bb\u03bf\u03b3\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03b5 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"GSM_in_Business_and_Industry\"><\/span>\u03a4\u03bf GSM \u03c3\u03c4\u03b9\u03c2 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03af\u03b1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u03a3\u03c4\u03b9\u03c2 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03ae\u03c3\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03af\u03b1, <strong>\u039f \u03c1\u03cc\u03bb\u03bf\u03c2 \u03c4\u03bf\u03c5 GSM<\/strong> \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03bb\u03cd\u03c0\u03bb\u03b5\u03c5\u03c1\u03b7. \u039f\u03b9 \u03b5\u03c4\u03b1\u03b9\u03c1\u03b5\u03af\u03b5\u03c2 \u03b2\u03b1\u03c3\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 GSM \u03b3\u03b9\u03b1 \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1, \u03b5\u03af\u03c4\u03b5 \u03c0\u03c1\u03cc\u03ba\u03b5\u03b9\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03c3\u03c5\u03bd\u03c4\u03bf\u03bd\u03b9\u03c3\u03bc\u03cc \u03bc\u03b5 \u03b1\u03c0\u03bf\u03bc\u03b1\u03ba\u03c1\u03c5\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03bf\u03bc\u03ac\u03b4\u03b5\u03c2 \u03b5\u03af\u03c4\u03b5 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c3\u03c7\u03ad\u03c3\u03b5\u03c9\u03bd \u03bc\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03c0\u03b5\u03bb\u03ac\u03c4\u03b5\u03c2. \u0397 \u03c0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03b1 \u03b5\u03bc\u03b2\u03ad\u03bb\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03b4\u03b9\u03b5\u03b8\u03bd\u03b5\u03af\u03c2 \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b4\u03c1\u03b1\u03c3\u03c4\u03b7\u03c1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2, \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c0\u03c1\u03cc\u03c3\u03ba\u03bf\u03c0\u03c4\u03b7 \u03c3\u03c5\u03bd\u03b4\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c0\u03ad\u03c1\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c3\u03cd\u03bd\u03bf\u03c1\u03b1.<\/p>\n\n\n\n<p>\u03a3\u03b5 \u03ba\u03bb\u03ac\u03b4\u03bf\u03c5\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03b5\u03c6\u03bf\u03b4\u03b9\u03b1\u03c3\u03c4\u03b9\u03ba\u03ae \u03ba\u03b1\u03b9 \u03bf\u03b9 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ad\u03c2, \u03c4\u03bf GSM \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7 \u03b1\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ce\u03bd \u03ba\u03b1\u03b9 \u03bf\u03c7\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd \u03c3\u03b5 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc \u03c7\u03c1\u03cc\u03bd\u03bf, \u03b5\u03bd\u03b9\u03c3\u03c7\u03cd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1. \u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03bf\u03b9 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03c4\u03bf\u03c5 GSM \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7 \u03bc\u03b7\u03c7\u03b1\u03bd\u03ae\u03c2 \u03bc\u03b5 \u03bc\u03b7\u03c7\u03b1\u03bd\u03ae (M2M) \u03c4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c4\u03bf\u03cd\u03bd \u03c4\u03bf \u0394\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf \u03c4\u03c9\u03bd \u03c0\u03c1\u03b1\u03b3\u03bc\u03ac\u03c4\u03c9\u03bd (<a href=\"https:\/\/blog.lebara.co.uk\/el\/the-future-of-connected-devices-exploring-the-synergy-between-5g-and-iot\/\">IoT<\/a>) \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2, \u03c0\u03c1\u03bf\u03c9\u03b8\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b1 \u03c3\u03b5 \u03c4\u03bf\u03bc\u03b5\u03af\u03c2 \u03cc\u03c0\u03c9\u03c2 \u03b7 \u03b3\u03b5\u03c9\u03c1\u03b3\u03af\u03b1, \u03b7 \u03c5\u03b3\u03b5\u03b9\u03bf\u03bd\u03bf\u03bc\u03b9\u03ba\u03ae \u03c0\u03b5\u03c1\u03af\u03b8\u03b1\u03bb\u03c8\u03b7 \u03ba\u03b1\u03b9 \u03b7 \u03bc\u03b5\u03c4\u03b1\u03c0\u03bf\u03af\u03b7\u03c3\u03b7.<\/p>\n\n\n\n<p>\u0397 \u03c0\u03c1\u03bf\u03c3\u03b1\u03c1\u03bc\u03bf\u03c3\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 GSM \u03c4\u03b7\u03bd \u03ad\u03c7\u03b5\u03b9 \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03b5\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03c3\u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf \u03c4\u03c9\u03bd \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03ae\u03c3\u03b5\u03c9\u03bd, \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03ad\u03bd\u03b1 \u03b5\u03c5\u03c1\u03cd \u03c6\u03ac\u03c3\u03bc\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03bf\u03bd\u03c4\u03b1\u03c2 \u03bd\u03ad\u03b5\u03c2 \u03b4\u03c5\u03bd\u03b1\u03c4\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b1\u03c2.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Future_of_GSM_Technology\"><\/span>\u03a4\u03bf \u03bc\u03ad\u03bb\u03bb\u03bf\u03bd \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 GSM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u039a\u03b1\u03b8\u03ce\u03c2 \u03b7 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1 \u03b5\u03be\u03b5\u03bb\u03af\u03c3\u03c3\u03b5\u03c4\u03b1\u03b9, \u03c4\u03bf GSM \u03c3\u03c5\u03bd\u03b5\u03c7\u03af\u03b6\u03b5\u03b9 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b1\u03c1\u03bc\u03cc\u03b6\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03b5\u03af. \u03a4\u03bf \u03bc\u03ad\u03bb\u03bb\u03bf\u03bd \u03c4\u03bf\u03c5 \u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03bd\u03ad\u03b5\u03c2 \u03b5\u03be\u03b5\u03bb\u03af\u03be\u03b5\u03b9\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03bd\u03c3\u03c9\u03bc\u03ac\u03c4\u03c9\u03c3\u03ae \u03c4\u03bf\u03c5 \u03c3\u03c4\u03b9\u03c2 \u03b1\u03bd\u03b1\u03b4\u03c5\u03cc\u03bc\u03b5\u03bd\u03b5\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b5\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"Innovations_in_GSM_Networks\"><\/span>\u039a\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b5\u03c2 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 GSM<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>\u039a\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b5\u03c2 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 GSM<\/strong> \u03b1\u03bd\u03bf\u03af\u03b3\u03bf\u03c5\u03bd \u03c4\u03bf \u03b4\u03c1\u03cc\u03bc\u03bf \u03b3\u03b9\u03b1 \u03bc\u03b5\u03bb\u03bb\u03bf\u03bd\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b5\u03be\u03b5\u03bb\u03af\u03be\u03b5\u03b9\u03c2. \u039c\u03b9\u03b1 \u03c4\u03ad\u03c4\u03bf\u03b9\u03b1 \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b5\u03bd\u03af\u03c3\u03c7\u03c5\u03c3\u03b7 \u03c4\u03c9\u03bd \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03b2\u03b5\u03bb\u03c4\u03b9\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7\u03bd \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03bf\u03c0\u03b9\u03c3\u03c4\u03af\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2. \u0397 \u03c0\u03c1\u03cc\u03bf\u03b4\u03bf\u03c2 \u03b1\u03c5\u03c4\u03ae \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c5\u03be\u03b1\u03bd\u03cc\u03bc\u03b5\u03bd\u03b7 \u03b6\u03ae\u03c4\u03b7\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03bf \u03b4\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf \u03ba\u03b1\u03b9 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c0\u03bf\u03bb\u03c5\u03bc\u03ad\u03c3\u03c9\u03bd.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03b7 \u03b5\u03bd\u03c3\u03c9\u03bc\u03ac\u03c4\u03c9\u03c3\u03b7 \u03c4\u03bf\u03c5 GSM \u03bc\u03b5 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b5\u03c2 IoT \u03b4\u03b9\u03b5\u03c5\u03c1\u03cd\u03bd\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c4\u03bf\u03c5. \u039f\u03b9 \u03ad\u03be\u03c5\u03c0\u03bd\u03b5\u03c2 \u03c0\u03cc\u03bb\u03b5\u03b9\u03c2, \u03c4\u03b1 \u03c3\u03c5\u03bd\u03b4\u03b5\u03b4\u03b5\u03bc\u03ad\u03bd\u03b1 \u03bf\u03c7\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03b1\u03c5\u03c4\u03bf\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b1 \u03b2\u03b9\u03bf\u03bc\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03ac \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b1\u03be\u03b9\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03c4\u03b7\u03bd \u03b9\u03c3\u03c7\u03c5\u03c1\u03ae \u03c5\u03c0\u03bf\u03b4\u03bf\u03bc\u03ae \u03c4\u03bf\u03c5 GSM \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b5\u03c0\u03b9\u03c4\u03cd\u03c7\u03bf\u03c5\u03bd \u03bd\u03ad\u03b1 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bd\u03b4\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03bf\u03b9 \u03b5\u03be\u03b5\u03bb\u03af\u03be\u03b5\u03b9\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b5\u03bd\u03b5\u03c1\u03b3\u03b5\u03b9\u03b1\u03ba\u03ae \u03b1\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c7\u03b5\u03af\u03c1\u03b9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 \u03bc\u03b5\u03b9\u03ce\u03bd\u03bf\u03c5\u03bd \u03c4\u03bf \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b9\u03ba\u03cc \u03ba\u03cc\u03c3\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03c0\u03b5\u03c1\u03b9\u03b2\u03b1\u03bb\u03bb\u03bf\u03bd\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b5\u03c0\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2, \u03b5\u03c5\u03b8\u03c5\u03b3\u03c1\u03b1\u03bc\u03bc\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf GSM \u03bc\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c4\u03cc\u03c7\u03bf\u03c5\u03c2 \u03c4\u03b7\u03c2 \u03b2\u03b9\u03ce\u03c3\u03b9\u03bc\u03b7\u03c2 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7\u03c2.<\/p>\n\n\n\n<p>\u039f\u03b9 \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03af\u03b5\u03c2 \u03b1\u03c5\u03c4\u03ad\u03c2 \u03c5\u03c0\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03c3\u03b1\u03c1\u03bc\u03bf\u03c3\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03bf\u03c5 GSM \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03c3\u03c5\u03bd\u03b5\u03c7\u03ae \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03c1\u03ba\u03ce\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03b1\u03bb\u03bb\u03cc\u03bc\u03b5\u03bd\u03bf \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03cc \u03c4\u03bf\u03c0\u03af\u03bf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"replaceWithId\"><span class=\"ez-toc-section\" id=\"GSMs_Role_in_5G_and_Beyond\"><\/span>\u039f \u03c1\u03cc\u03bb\u03bf\u03c2 \u03c4\u03bf\u03c5 GSM \u03c3\u03c4\u03bf 5G \u03ba\u03b1\u03b9 \u03c0\u03ad\u03c1\u03b1\u03bd \u03b1\u03c5\u03c4\u03bf\u03cd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u0397 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1 GSM \u03c3\u03c5\u03bd\u03b5\u03c7\u03af\u03b6\u03b5\u03b9 \u03bd\u03b1 \u03c0\u03b1\u03af\u03b6\u03b5\u03b9 \u03c1\u03cc\u03bb\u03bf \u03ba\u03b1\u03b8\u03ce\u03c2 \u03bf \u03ba\u03cc\u03c3\u03bc\u03bf\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03b1\u03af\u03bd\u03b5\u03b9 \u03c3\u03b5 <strong><a href=\"https:\/\/blog.lebara.co.uk\/el\/which-iphones-support-5g\/\">5G<\/a> \u03ba\u03b1\u03b9 \u03cc\u03c7\u03b9 \u03bc\u03cc\u03bd\u03bf<\/strong>. \u0395\u03bd\u03ce \u03c4\u03bf 5G \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03b5\u03b9 \u03c0\u03c1\u03c9\u03c4\u03bf\u03c6\u03b1\u03bd\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bd\u03b4\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1, \u03c4\u03bf GSM \u03c0\u03b1\u03c1\u03b1\u03bc\u03ad\u03bd\u03b5\u03b9 \u03bc\u03b9\u03b1 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1, \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b1 \u03c0\u03b1\u03bb\u03b1\u03b9\u03ac \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03bd\u03c4\u03b1\u03c2 \u03bc\u03b9\u03b1 \u03b5\u03c6\u03b5\u03b4\u03c1\u03b9\u03ba\u03ae \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae \u03c3\u03b5 \u03c0\u03b5\u03c1\u03b9\u03bf\u03c7\u03ad\u03c2 \u03cc\u03c0\u03bf\u03c5 \u03c4\u03bf 5G \u03b4\u03b5\u03bd \u03ad\u03c7\u03b5\u03b9 \u03b1\u03ba\u03cc\u03bc\u03b7 \u03b1\u03bd\u03b1\u03c0\u03c4\u03c5\u03c7\u03b8\u03b5\u03af.<\/p>\n\n\n\n<p>\u0397 \u03ba\u03b1\u03b8\u03b9\u03b5\u03c1\u03c9\u03bc\u03ad\u03bd\u03b7 \u03c5\u03c0\u03bf\u03b4\u03bf\u03bc\u03ae \u03c4\u03bf\u03c5 GSM \u03c3\u03c5\u03bc\u03c0\u03bb\u03b7\u03c1\u03ce\u03bd\u03b5\u03b9 \u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 5G, \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c5\u03bd\u03b5\u03c0\u03ae \u03ba\u03ac\u03bb\u03c5\u03c8\u03b7 \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b1\u03b8\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03b9\u03ce\u03bd. \u0397 \u03b5\u03be\u03ad\u03bb\u03b9\u03be\u03b7 \u03c4\u03b7\u03c2 \u03c4\u03b5\u03c7\u03bd\u03bf\u03bb\u03bf\u03b3\u03af\u03b1\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b7\u03bd \u03b5\u03bd\u03b9\u03c3\u03c7\u03c5\u03bc\u03ad\u03bd\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03c4\u03cd\u03c0\u03bf\u03c5 \u03bc\u03b7\u03c7\u03b1\u03bd\u03ae\u03c2 (eMTC) \u03ba\u03b1\u03b9 \u03c4\u03bf \u03c3\u03c4\u03b5\u03bd\u03bf\u03b6\u03c9\u03bd\u03b9\u03ba\u03cc IoT (NB-IoT) \u03b4\u03b9\u03b5\u03c5\u03ba\u03bf\u03bb\u03cd\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b5\u03bd\u03c3\u03c9\u03bc\u03ac\u03c4\u03c9\u03c3\u03ae \u03c4\u03b7\u03c2 \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1 \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03b7\u03c2 \u03b3\u03b5\u03bd\u03b9\u03ac\u03c2.<\/p>\n\n\n\n<p>\u039a\u03b1\u03b8\u03ce\u03c2 \u03bf \u03ba\u03bb\u03ac\u03b4\u03bf\u03c2 \u03c4\u03c9\u03bd \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd \u03b5\u03be\u03b5\u03bb\u03af\u03c3\u03c3\u03b5\u03c4\u03b1\u03b9, \u03b7 \u03b4\u03b9\u03b1\u03c1\u03ba\u03ae\u03c2 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 GSM \u03b1\u03bd\u03b1\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03b5\u03b9 \u03c4\u03bf\u03bd \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7 \u03c1\u03cc\u03bb\u03bf \u03c4\u03bf\u03c5 \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03b3\u03ba\u03cc\u03c3\u03bc\u03b9\u03b1 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1, \u03b3\u03b5\u03c6\u03c5\u03c1\u03ce\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c7\u03ac\u03c3\u03bc\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03c9\u03bd \u03ba\u03b1\u03b9\u03bd\u03bf\u03c4\u03bf\u03bc\u03b9\u03ce\u03bd \u03c4\u03bf\u03c5 \u03c0\u03b1\u03c1\u03b5\u03bb\u03b8\u03cc\u03bd\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03bc\u03b5\u03bb\u03bb\u03bf\u03bd\u03c4\u03b9\u03ba\u03ce\u03bd \u03b4\u03c5\u03bd\u03b1\u03c4\u03bf\u03c4\u03ae\u03c4\u03c9\u03bd.<\/p>","protected":false},"excerpt":{"rendered":"<p>When it comes to mobile communication, understanding GSM, or Global System for Mobile Communications, is essential. But what is GSM, exactly? Simply put, GSM is a standard developed to describe the protocols for second-generation digital cellular networks used by mobile phones. Developed in the late 1980s, it has become the most widely used mobile telephony&#8230;<\/p>\n<div><a class=\"read-more button-link\" href=\"https:\/\/blog.lebara.co.uk\/el\/understanding-gsm-the-basics-explained\/\">\u0394\u03b9\u03b1\u03b2\u03ac\u03c3\u03c4\u03b5 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b1<\/a><\/div>","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-2786","post","type-post","status-publish","format-standard","hentry","category-phones","clearfix",false],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/posts\/2786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/comments?post=2786"}],"version-history":[{"count":1,"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/posts\/2786\/revisions"}],"predecessor-version":[{"id":2827,"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/posts\/2786\/revisions\/2827"}],"wp:attachment":[{"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/media?parent=2786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/categories?post=2786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.lebara.co.uk\/el\/wp-json\/wp\/v2\/tags?post=2786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}