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  2. GSM frequency bands - Wikipedia

    en.wikipedia.org/wiki/GSM_frequency_bands

    The term Cellular is sometimes used to describe GSM services in the 850 MHz band, because the original analog cellular mobile communication system was allocated in this spectrum. Further GSM-850 is also sometimes called GSM-800 because this frequency range was known as the "800 MHz band" (for simplification) when it was first allocated for AMPS ...

  3. List of mobile phone brands by country - Wikipedia

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

    This is the list of mobile phone brands sorted by the country from which the brands originate. The number of mobile phone brands peaked to more than 750 in 2017 before declining to nearly 250 brands in 2023. [1] Bold refers to major smartphone brand. [2] [3]

  4. OnePlus - Wikipedia

    en.wikipedia.org/wiki/OnePlus

    OnePlus Technology (Shenzhen) Co., Ltd. (Chinese: 一加科技; pinyin: Yījiā Kējì), doing business as OnePlus, is a Chinese consumer electronics manufacturer ...

  5. Lifeline (FCC program) - Wikipedia

    en.wikipedia.org/wiki/Lifeline_(FCC_program)

    Lifeline is the Federal Communications Commission's program, established in 1985, intended to make communications services more affordable for low-income consumers. . Lifeline provides subscribers a discount on monthly telephone service purchased from participating providers in the mark

  6. Nextel - Wikipedia

    en.wikipedia.org/wiki/NEXTEL

    Nextel affected the cellular phone market in several ways. It was the first company to successfully provide unlimited calling plans to a large customer base. Nextel was the first company to implement a nationwide push-to-talk system similar to a walkie-talkie, marketed as DirectConnect.

  7. Mobile phone jammer - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_jammer

    Example of a mobile phone jammer, produced by Jammerspro. A mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones, disrupting the communication between the phone and the cell-phone base station, effectively disabling mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting ...

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