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2. Verizon (wireless service) - Wikipedia

   en.wikipedia.org/wiki/Verizon_(wireless_service)

   Verizon Wireless offers mobile phone services through a variety of devices. [9] Its LTE in Rural America Program, with 21 rural wireless carriers participating, covers 2.7 million potential users in 169 rural counties. [10] Verizon Wireless announced in 2015 that it was developing a 5G, or fifth-generation, network. [11]

3. 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 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.

4. How to Get Out of AT&T iPhone Contract and Switch to Verizon ...

   www.aol.com/news/2011-01-12-get-out-of-atandt...

   With a $325 early termination fee required to get out of a two-year iPhone contract with AT&T, making the switch to Verizon when it starts selling the iPhone 4 on Feb. 10 can be painful for ...

5. TracFone Wireless - Wikipedia

   en.wikipedia.org/wiki/TracFone_Wireless

   TracFone Wireless, Inc. (TFWI) is an American wireless prepaid service provider.It is a mobile virtual network operator offering prepaid and no-contract services on the Verizon network under multiple brands, including TracFone, Straight Talk Wireless, Total Wireless, Simple Mobile, SafeLink Wireless, and Walmart Family Mobile in partnership with Walmart.

6. Mobile Telephone Switching Office - Wikipedia

   en.wikipedia.org/wiki/Mobile_Telephone_Switching...

   When the MSC gets the call, it checks its database for the location of the phone. Then it picks a frequency pair the phone will use in that cell to take the call. The MSC communicates with the phone over the control channel to tell it which frequencies to use, and once the phone and the tower switch on those frequencies, the call is connected.

7. 5ESS Switching System - Wikipedia

   en.wikipedia.org/wiki/5ESS_Switching_System

   The 5ESS switch has three main types of modules: the Administrative Module (AM) contains the central computers; the Communications Module (CM) is the central time-divided switch of the system; and the Switching Module (SM) makes up the majority of the equipment in most exchanges. The SM performs multiplexing, analog and digital coding, and ...