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USSD is commonly used by prepaid GSM cellular phones to query the available balance. The vendor's "check balance" application hides the details of the USSD protocol from the user. On some pay as you go networks, such as Tesco Mobile, once a user performs an action that costs money, the user sees a USSD message with their new balance.
NumberSync is an AT&T service that allows some postpaid wireless customers to use one telephone number to send and receive calls and text messages across all of their supported devices, including smartwatches. [1] The service, which was created by myaNUMBER and licensed to AT&T compares to Apple Continuity, [2] is free of charge to AT&T ...
This list contains the mobile country codes and mobile network codes for networks with country codes between 300 and 399, inclusively – a region that covers North America and the Caribbean.
The Magenta family of plans build on the existing features of the T-Mobile ONE and ONE Plus plans, but now include additional features like 3 GB of mobile hotspot data for standard Magenta plans, and retaining the same enhanced HD streaming, 20 GB of mobile hotspot data, and other features of the T-Mobile ONE Plus plans. [146]
US Mobile is an American mobile virtual network operator (MVNO) that uses the T-Mobile, Verizon Wireless, and AT&T networks (branded as "Light Speed", "Warp", and "Dark Star" respectively) to provide talk, text, and data services to their customers. US Mobile has over 1,000,000 customers as of 2024.
The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices.. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network.
Since the Autumn of 2016, Wifi Calling / Voice over Wifi has been available for customers of Telenor Denmark, including the ability to do handover to and from the 4G (VoLTE) network. This is available for several Samsung and Apple handsets. AT&T [29] and Verizon [30] are going to launch Wi-Fi calling in 2015.
The usage of frequencies within the United States is regulated by the Federal Communications Commission (FCC). When distributing initial spectrum licenses in a band the FCC divides the US geographically into a number of areas. [1] A mobile operator (or other interested party) must bid on each area individually.