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  2. Mobile phone - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone

    Mobile phone. A mobile phone or cell phone [a] is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone ( landline phone ). The radio frequency link establishes a connection to the switching systems of a mobile phone ...

  3. History of mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_mobile_phones

    A satellite phone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do. Therefore, they can work in most geographic locations on the Earth's surface, as long as open sky and the line-of-sight between the phone and ...

  4. List of mobile network operators in the United States - Wikipedia

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

    AT&T, T-Mobile, Verizon, Dish Wireless , 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 ...

  5. Cellular network - Wikipedia

    en.wikipedia.org/wiki/Cellular_network

    A cellular network or mobile network is a telecommunications network where the link to and from end nodes is wireless and the network is distributed over land areas called cells, each served by at least one fixed-location transceiver (typically three cell sites or base transceiver stations ). These base stations provide the cell with the ...

  6. Assurance Wireless - Wikipedia

    en.wikipedia.org/wiki/Assurance_Wireless

    Assurance Wireless is a telephone service subsidized by the federal Lifeline Assistance program, a government benefit program supported by the federal Universal Service Fund. The service provides to low-income eligible people a free phone, [1] [2] free monthly data, unlimited texting, and free monthly minutes.

  7. Wireless - Wikipedia

    en.wikipedia.org/wiki/Wireless

    Wireless communication spans the spectrum from 9 kHz to 300 GHz. [citation needed] Applications Mobile telephones. One of the best-known examples of wireless technology is the mobile phone, also known as a cellular phone, with more than 6.6 billion mobile cellular subscriptions worldwide as of the end of 2010.

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