{"id":3235,"date":"2024-07-17T02:11:00","date_gmt":"2024-07-17T02:11:00","guid":{"rendered":"https:\/\/www.jammersignal.com\/?p=3235"},"modified":"2024-06-28T05:26:31","modified_gmt":"2024-06-28T05:26:31","slug":"2g3g-is-gradually-withdrawn-from-the-network","status":"publish","type":"post","link":"https:\/\/www.jammersignal.com\/es\/2g3g-is-gradually-withdrawn-from-the-network\/","title":{"rendered":"El 2G3G se retira gradualmente de la red, \u00bfpueden las personas mayores seguir utilizando sus tel\u00e9fonos m\u00f3viles?"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Las redes 2G y 3G se est\u00e1n retirando gradualmente de la red. Las personas mayores, \u00bfpueden seguir usando el m\u00f3vil?<\/h2>\n\n\n\n<p>Con la retirada gradual de las redes 2G y 3G, muchos usuarios tienen dudas sobre la funcionalidad de los actuales tel\u00e9fonos m\u00f3viles 2G. La coexistencia de varias generaciones de redes plantea retos. Es crucial conocer las caracter\u00edsticas de las redes 2G y 3G y las razones de su retirada.<\/p>\n\n\n\n<p>La red 2G empez\u00f3 a utilizarse comercialmente en 1991, proporcionando llamadas de voz y mensajes de texto b\u00e1sicos, pero en comparaci\u00f3n con las avanzadas redes 4G\/5G ampliamente utilizadas hoy en d\u00eda, la red 2G se ha quedado muy atr\u00e1s. Seg\u00fan datos de la Asociaci\u00f3n Mundial de Proveedores de Telefon\u00eda M\u00f3vil, en septiembre del a\u00f1o pasado, 142 operadores de 56 pa\u00edses y regiones de todo el mundo hab\u00edan completado o ten\u00edan previsto cerrar sus redes 2G\/3G.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/www.jammersignal.com\/es\/producto\/4g-hot-sale-8antenna-handheld-cell-phone-blocker\/\"><img fetchpriority=\"high\" decoding=\"async\" width=\"433\" height=\"433\" src=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1.jpg\" alt=\"4g jammer jammersignal handheld portable jammers (1)\" class=\"wp-image-1763\" srcset=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1.jpg 433w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-300x300.jpg 300w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-150x150.jpg 150w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-100x100.jpg 100w\" sizes=\"(max-width: 433px) 100vw, 433px\" \/><\/a><\/figure>\n\n\n\n<p>La coexistencia de redes 2G, 3G, 4G y 5G acarrea problemas como los elevados costes de explotaci\u00f3n y la escasa eficiencia en la utilizaci\u00f3n de los recursos del espectro. Con la aparici\u00f3n de la tecnolog\u00eda 5G, la demanda de las personas de velocidades de comunicaci\u00f3n m\u00e1s r\u00e1pidas y servicios m\u00e1s avanzados sigue creciendo, y las capacidades de las redes 2G y 3G ya no pueden satisfacer la demanda. Seguir apoyando estas tecnolog\u00edas supondr\u00e1 un despilfarro de valiosos recursos espectrales.<\/p>\n\n\n\n<p>A pesar de la tendencia a la retirada, la gran base de usuarios y la lentitud de la transici\u00f3n plantean retos. Solo en China, seguir\u00e1 habiendo 273 millones de usuarios de 2G en 2020, lo que representa el 17,15% del total de usuarios. Muchos de estos usuarios son personas mayores de zonas remotas que tienen una demanda limitada de smartphones y utilizan sus tel\u00e9fonos principalmente para llamadas de voz.<\/p>\n\n\n\n<p>Ling Li, profesor asociado de la Universidad de Fudan, explic\u00f3 que la iteraci\u00f3n tecnol\u00f3gica es la tendencia general y que los operadores est\u00e1n abandonando gradualmente las redes 2G y 3G. Pero este proceso lleva tiempo porque a\u00fan hay muchos usuarios que dependen de estas redes, incluidos los que utilizan redes 2G\/3G para sistemas IoT de gesti\u00f3n urbana. Los m\u00e1s vendidos <a href=\"https:\/\/www.jammersignal.com\/es\/product-category\/wifi-jammer\/\">Interferentes WIFI<\/a> y <a href=\"https:\/\/www.jammersignal.com\/es\/product-category\/gps-signal-jammer\/\">Inhibidores de GPS<\/a> en Europa y Am\u00e9rica.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"800\" height=\"750\" src=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-2.jpg\" alt=\"4g jammer jammersignal handheld portable jammers (2)\" class=\"wp-image-1764\" style=\"width:500px\" srcset=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-2.jpg 800w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-2-300x281.jpg 300w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-2-768x720.jpg 768w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-2-600x563.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>En cuanto al uso de tel\u00e9fonos m\u00f3viles para personas mayores, los operadores locales de Guangzhou dijeron que la red 2G dejar\u00e1 de estar abierta y los tel\u00e9fonos m\u00f3viles deber\u00e1n activar la funci\u00f3n de Voz sobre LTE (VoLTE). VoLTE es un servicio de llamadas basado en la red 4G. Si el m\u00f3vil no dispone de esta funci\u00f3n, no podr\u00e1 utilizarse y los usuarios tendr\u00e1n que comprar un m\u00f3vil nuevo. En la actualidad, es gratis actualizar la tarjeta SIM del tel\u00e9fono m\u00f3vil 2G a una tarjeta SIM 4G o 5G sin cambiar el plan existente.<\/p>\n\n\n\n<p>En resumen, a medida que las redes 2G y 3G van desapareciendo, es muy importante que el tel\u00e9fono m\u00f3vil de las personas mayores sea compatible con VoLTE. Si no es as\u00ed, es posible que los usuarios tengan que actualizar sus tel\u00e9fonos m\u00f3viles. Los operadores est\u00e1n abandonando gradualmente estas redes, pero este proceso llevar\u00e1 tiempo debido a la gran base de usuarios y al hecho de que algunas aplicaciones siguen dependiendo de las redes 2G\/3G.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h5 class=\"wp-block-heading has-text-align-center\">Los m\u00e1s vendidos Bloqueadores de se\u00f1al<\/h5>\n\n\n<div data-block-name=\"woocommerce\/product-category\" data-categories=\"[100]\" data-columns=\"4\" data-content-visibility=\"{&quot;image&quot;:true,&quot;title&quot;:true,&quot;price&quot;:true,&quot;rating&quot;:false,&quot;button&quot;:false}\" data-orderby=\"menu_order\" data-rows=\"2\" class=\"wc-block-grid wp-block-product-category wp-block-woocommerce-product-category wc-block-product-category has-4-columns has-multiple-rows\"><ul class=\"wc-block-grid__products\"><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.jammersignal.com\/es\/producto\/4g-hot-sale-8antenna-handheld-cell-phone-blocker\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-onsale\">\n\t\t\t<span aria-hidden=\"true\" data-no-translation=\"\" data-trp-gettext=\"\">Venta<\/span>\n\t\t\t<span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">Producto en venta<\/span>\n\t\t<\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"4g jammer jammersignal handheld portable jammers (1)\" srcset=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-300x300.jpg 300w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-150x150.jpg 150w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1-100x100.jpg 100w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/4g-jammer-jammersignal-handheld-portable-jammers-1.jpg 433w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">4G Jammer Venta caliente 8 antena port\u00e1til de mano del tel\u00e9fono celular bloqueador de se\u00f1al<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><del aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>599.00<\/span><\/del> <span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio original era: &#036;599.00.<\/span><ins aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>219.99<\/span><\/ins><span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio actual es: &#036;219.99.<\/span><\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.jammersignal.com\/es\/producto\/portable-24antenna-full-frequency-jammer-blocks-all-signals\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-onsale\">\n\t\t\t<span aria-hidden=\"true\" data-no-translation=\"\" data-trp-gettext=\"\">Venta<\/span>\n\t\t\t<span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">Producto en venta<\/span>\n\t\t<\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"primer bloqueador port\u00e1til jammersignal del mundo (1)\" srcset=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1-300x300.jpg 300w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1-150x150.jpg 150w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1-768x768.jpg 768w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1-600x600.jpg 600w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1-100x100.jpg 100w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/world-first-jammersignal-blocks-portable-jammers-1.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">El primer bloqueador port\u00e1til de 24 antenas bloquea todas las se\u00f1ales<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><del aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>1,599.00<\/span><\/del> <span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio original era: &#036;1,599.00.<\/span><ins aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>829.88<\/span><\/ins><span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio actual es: &#036;829.88.<\/span><\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.jammersignal.com\/es\/producto\/handheld-4g-5g-jammer-vhf-lojack-wifi-gps-16antenna\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-onsale\">\n\t\t\t<span aria-hidden=\"true\" data-no-translation=\"\" data-trp-gettext=\"\">Venta<\/span>\n\t\t\t<span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">Producto en venta<\/span>\n\t\t<\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"interferentes jammersignal 4g 5g de alto rendimiento (1)\" srcset=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1-300x300.jpg 300w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1-150x150.jpg 150w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1-768x768.jpg 768w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1-600x600.jpg 600w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1-100x100.jpg 100w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/high-performance-jammersignal-4g-5g-jammers-1.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">Handheld 4G 5G Jammer VHF LOJACK WiFi GPS 16 Antena Interceptor Alto Rendimiento<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><del aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>1,539.00<\/span><\/del> <span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio original era: &#036;1,539.00.<\/span><ins aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>839.99<\/span><\/ins><span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio actual es: &#036;839.99.<\/span><\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.jammersignal.com\/es\/producto\/6antennas-cell-phone-jamming-device-wifi-gps-gsm\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-onsale\">\n\t\t\t<span aria-hidden=\"true\" data-no-translation=\"\" data-trp-gettext=\"\">Venta<\/span>\n\t\t\t<span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">Producto en venta<\/span>\n\t\t<\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/6-antennas-cell-jammersignal-device-jamming-signal-jammers-5-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"6 antenas c\u00e9lula jammersignal dispositivo jamming se\u00f1al jammers (5)\" srcset=\"https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/6-antennas-cell-jammersignal-device-jamming-signal-jammers-5-300x300.jpg 300w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/6-antennas-cell-jammersignal-device-jamming-signal-jammers-5-150x150.jpg 150w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/6-antennas-cell-jammersignal-device-jamming-signal-jammers-5-100x100.jpg 100w, https:\/\/www.jammersignal.com\/wp-content\/uploads\/2024\/05\/6-antennas-cell-jammersignal-device-jamming-signal-jammers-5.jpg 550w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">6 Antenas Tel\u00e9fono Celular Se\u00f1al Jamming Dispositivo WIFI GPS GSM 3G CDMA DCS 4G<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><del aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>429.00<\/span><\/del> <span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio original era: &#036;429.00.<\/span><ins aria-hidden=\"true\"><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#036;<\/span>199.99<\/span><\/ins><span class=\"screen-reader-text\" data-no-translation=\"\" data-trp-gettext=\"\">El precio actual es: &#036;199.99.<\/span><\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/li><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>Las redes 2G y 3G se est\u00e1n retirando gradualmente de la red. \u00bfPueden las personas mayores seguir utilizando sus tel\u00e9fonos m\u00f3viles? Con la retirada gradual de las redes 2G y 3G, muchos usuarios tienen dudas sobre la funcionalidad de los m\u00f3viles 2G existentes. La coexistencia de varias generaciones de redes plantea retos. Es crucial comprender las caracter\u00edsticas [...]<\/p>","protected":false},"author":1,"featured_media":1551,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[99],"tags":[],"class_list":["post-3235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-signal-jammer-information"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>2G3G is gradually withdrawn from the network, can the elderly still use their mobile phones? - JAMMERSIGNAL<\/title>\n<meta name=\"description\" content=\"With the gradual withdrawal of 2G and 3G networks, many users have doubts about the functionality of existing 2G mobile phones. 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