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  2. List of mobile network operators in the United States

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

    Acquired by Verizon Wireless and AT&T Mobility. [38] AT&T Wireless Services: GSM: EDGE: 22: October 2004: Acquired by Cingular Wireless, which later rebranded to AT&T Mobility. [39] Big Sky Mobile: GSM: EDGE: Unknown: 2017: Sold spectrum licenses to AT&T and T-Mobile and exited the business. [40] Blaze Wireless: GSM, UMTS: EDGE, HSPA+, LTE ...

  3. AT&T Wireless Services - Wikipedia

    en.wikipedia.org/wiki/AT&T_Wireless_Services

    This was per a pre-spinoff agreement with AT&T Corp. that stated that if AT&T Wireless was to be bought by a competitor, the rights to the name AT&T Wireless and the use of the AT&T name in wireless phone service would revert to AT&T Corp. AT&T Wireless's prepaid services, Go Phone, was adopted by Cingular Wireless after the merger closed, and ...

  4. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]

  5. Automatic number identification - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    Modern toll-free telephone numbers, which generate itemized billing of all calls received instead of relying on the special fixed-rate trunks of the Bell System's original Inward WATS service, depend on ANI to track inbound calls to numbers in special area codes such as +1-800, 888, 877, 866, 855, 844, and 833 with 822 reserved for future toll free use (United States and Canada), 1800 ...

  6. 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 three major cellular carriers in the countryv—AT&T Mobility, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

  7. GSM - Wikipedia

    en.wikipedia.org/wiki/GSM

    GSM networks operate in a number of different carrier frequency ranges (separated into GSM frequency ranges for 2G and UMTS frequency bands for 3G), with most 2G GSM networks operating in the 900 MHz or 1800 MHz bands. Where these bands were already allocated, the 850 MHz and 1900 MHz bands were used instead (for example in Canada and the ...

  8. Vodafone Hungary - Wikipedia

    en.wikipedia.org/wiki/Vodafone_Hungary

    On 30 January 2003 the company launched the Vodafone live! service and in the same year, the customer base of Vodafone reached over 1 million. [6] In December 2004, Vodafone purchased the third 3G licence under the 2004 UMTS tender of NHH. [6] In 2005, Vodafone launched the Vodafone Passport service, available in 17 countries at the time.

  9. Globe Telecom - Wikipedia

    en.wikipedia.org/wiki/Globe_Telecom

    Globe Telecom, Inc., commonly shortened as Globe, is a major provider of telecommunications services in the Philippines.The company operates the largest mobile network in the Philippines and one of the largest fixed-line and broadband networks.

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