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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. WiMAX and LTE use OFDM.
CDMA service suspended starting from 31 October 2017. ... Spectrum re-allocated for E-GSM 900 (Band 8). ... Leap Wireless United States ...
Acquired by Verizon Wireless: Choice Wireless former Amerilink Wireless: GSM: EDGE: Unknown: 2016: Became a T-Mobile US MVNO. Cincinnati Bell Wireless: GSM, UMTS, GAN Wi-Fi calling [48] EDGE, HSPA+: 0.34 [49] (January 2014) February 2015: Spectrum assets acquired by Verizon Wireless, service to any customers remaining on the network was shut ...
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
Verizon Communications: United States United States Virgin Islands Puerto Rico ... CDMA, GSM, GPRS, EDGE, UMTS, HSDPA, HSPA+, LTE; 110.0 [21] (Q1 2022) Government of ...
The 700 MHz band was auctioned in early 2008 using spectrum previously used by television stations' analog broadcasts, with Verizon Wireless and AT&T Mobility winning the majority of available spectrum. Qualcomm and Echostar were winners of a significant amount of broadcast-oriented spectrum. Verizon Wireless will use the upper band of the 700 ...
In Russia and some other countries, local carriers received licenses for 450 MHz frequency to provide CDMA mobile coverage area. Many GSM phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz), and are usually referred to as tri-band and quad-band phones, or world phones; with such a ...
Some MVNOs use more than one host, which may even have different technologies (for example, different Starlink, Spectrum (brand) and TracFone handsets use either CDMA and 1xRTT on Verizon Wireless, or GSM and UMTS on AT&T Mobility or GSM and UMTS on T-Mobile US).