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  2. Category : Defunct mobile phone companies of the United States

    en.wikipedia.org/wiki/Category:Defunct_mobile...

    Defunct mobile phone companies of the United States. Subcategories. This category has the following 2 subcategories, out of 2 total. H. Helio (wireless carrier) (4 P) S.

  3. Category:Defunct telecommunications companies of the United ...

    en.wikipedia.org/wiki/Category:Defunct...

    Pages in category "Defunct telecommunications companies of the United States" The following 98 pages are in this category, out of 98 total. ... Explora Phones Inc; F.

  4. History of mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_mobile_phones

    It was unencrypted and easily vulnerable to eavesdropping via a scanner; it was susceptible to cell phone "cloning" and it used a Frequency-division multiple access (FDMA) scheme and required significant amounts of wireless spectrum to support. On 6 March 1983, the DynaTAC 8000X mobile phone launched on the first US 1G network by Ameritech.

  5. Category : Mobile phone companies of the United States

    en.wikipedia.org/wiki/Category:Mobile_phone...

    Defunct mobile phone companies of the United States (2 C, 32 P) L. Liberty Latin America (8 P) T. T-Mobile US (1 C, 10 P)

  6. List of mobile phone brands by country - Wikipedia

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

    Sub-brand of Vietnam Telecommunications and Electronic Cables Joint Stock Company (VINACAP) - a subsidiary of VNPT. The brand was launched for the low-end market and targeted to users of Vinaphone's services. The brand ceased operation in c. 2016 due to poor sales. Hi-Mobile: Subsidiary of HiPT Bluefone: Subsidiary of CMC Cooperation Mobiistar ...

  7. List of mobile network operators in the United States

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

    Parent company, Pinpoint Communications, discontinued cellular service and spectrum leases through Viaero Wireless were cancelled. Blue Wireless: CDMA2000: EV-DO, LTE: Unknown: July 2020: Exited business and sold spectrum licenses to Verizon. [42] Bluegrass Cellular: CDMA2000: EV-DO, LTE: 0.210 (March 2021) [43] March 2021: Acquired by Verizon ...

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