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The Cellular band occupies 824–849 MHz and 869–894 MHz ranges. To issue cellular licenses, the FCC divided the U.S. into 734 geographic markets called Cellular Market Areas (CMAs) and divided the 40 MHz of spectrum into two, 20 MHz amounts referred to as channel blocks; channel block A and channel block B.
In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA.
Website. uscellular.com. United States Cellular Corporation (doing business as UScellular and formerly known as U.S. Cellular) is an American mobile network operator. Its stock is publicly traded, but Telephone and Data Systems Inc. owns a controlling stake (83% economic and 96% voting power). The company was formed in 1983 and is headquartered ...
All of the major carriers plan on shutting down their 3G networks in 2022, with AT&T in February, T-Mobile in the summer and Verizon at year's end.
United States: CDMA2000 1xRTT, EV-DO Rev. A 1900 Dec 2001: Sep 2015 [170] [171] Operator acquired by AT&T. MetroPCS United States: CDMA2000 1xRTT, EV-DO Rev. A 1900 Feb 2002: Jun 2015 [172] [173] Operator acquired by T-Mobile. Sprint (incl. Open Mobile) United States Puerto Rico U.S. Virgin Islands: CDMA2000 1xRTT, EV-DO Rev. A 800 (BC10) 1900 ...
3G is the third generation of wireless mobile telecommunications technology. It is the upgrade to 2G, 2.5G, GPRS and 2.75G Enhanced Data Rates for GSM Evolution networks, offering faster data transfer, and better voice quality. [1] This network was superseded by 4G, and later by 5G. This network is based on a set of standards used for mobile ...
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