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2. List of mobile network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_network...

   AT&T, T-Mobile, Verizon, Boost Mobile, and UScellular also sell SIM cards through their retail channels, both in-store and online. The top five wireless providers operate nationwide wireless networks which cover most of the population in the United States, while smaller carriers provide native network coverage across selected regions of the ...

3. T-Mobile US - Wikipedia

   en.wikipedia.org/wiki/T-Mobile_US

   On September 2, 2001, VoiceStream Wireless Inc. adopted the name, T-Mobile USA, Inc. and began rolling out the T-Mobile brand, starting with locations in California and Nevada. [19] T-Mobile USA, Inc. was an operating entity of T-Mobile International AG, [4] before becoming a direct subsidiary of Deutsche Telekom AG. [20]

4. List of mobile virtual network operators in the United States

   en.wikipedia.org/wiki/List_of_mobile_virtual...

   Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the three major cellular carriers in the countryv—AT&T Mobility, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

5. T-Mobile (brand) - Wikipedia

   en.wikipedia.org/wiki/T-Mobile_(brand)

   In December 1999, T-Mobile International AG & Co. KG holding company was founded (later renamed T-Mobile International AG). In 2002, as DT consolidated its international operations, it anglicized the T-Mobil name to T-Mobile. On 5 July 2005 Deutsche Telekom transformed its structure and adopted a regional setup (Germany, Europe, US).

6. List of mobile network operators of the Caribbean - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

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7. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   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.