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  2. List of mobile phone brands by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_phone...

    Bankruptcy in 2006, defunct in 2007. Grundig Mobile. Hagenuk Telecom GmbH. insolvency in 1997, mobile phone development and manufacturing business acquired by Telital in 1998 [9] Siemens Mobile. Acquired by BenQ Corporation in 2005 to form BenQ Mobile. Telefunken. Italy. Onda Mobile Communication.

  3. 5G - Wikipedia

    en.wikipedia.org/wiki/5G

    Wireless network technologies. In telecommunications, 5G is the fifth-generation technology standard for cellular networks, which cellular phone companies began deploying worldwide in 2019, and is the successor to 4G technology that provides connectivity to most current mobile phones. Like its predecessors, 5G networks are cellular networks, in ...

  4. GSM frequency bands - Wikipedia

    en.wikipedia.org/wiki/GSM_frequency_bands

    In North America, GSM operates on the primary mobile communication bands 850 MHz and 1900 MHz. In Canada, GSM-1900 is the primary band used in urban areas with 850 as a backup, and GSM-850 being the primary rural band. In the United States, regulatory requirements determine which area can use which band. The term Cellular is sometimes used to ...

  5. 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 ...

  6. Mobile phone - Wikipedia

    en.wikipedia.org/wiki/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 operator, which ...

  7. List of mobile network operators - Wikipedia

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

    For a more comprehensive list of mobile phone operators, see Mobile country codes. Terrestrial This is a list of the world's thirty largest terrestrial mobile phone ...

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