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  2. T-Mobile US - Wikipedia

    en.wikipedia.org/wiki/T-Mobile_US

    T-Mobile USA received a portion of the 1.3 million largely warrantless law enforcement requests for subscriber information (including text messages and phone location data) made in 2011, but refused to state how many requests it received. [251] It did say that in the last decade, the number of requests have increased by 12 to 16 percent annually.

  3. Mobile positioning data - Wikipedia

    en.wikipedia.org/wiki/Mobile_positioning_data

    Mobile positioning data (MPD) is a form of big data which results from the high data volumes of mobile positioning – tracking the location of mobile phones. [1] Mobile positioning data can be used for generating population and tourism statistics, for measuring human mobility, creating data-driven solutions in urban planning, establishing a ...

  4. T-Mobile 4G LTE CellSpot - Wikipedia

    en.wikipedia.org/wiki/T-Mobile_4G_LTE_CellSpot

    Askey Computer Corp. (subsidiary of Asus), Nokia and T-Mobile USA: Type: Femtocell: Availability: 2015: Introductory price: Free in combination with subscription: System on a chip: Qualcomm FSM99xx series with Qualcomm Hexagon-based modem: Connectivity: LTE and UMTS: Power: 12V, 2A: Website: www.t-mobile.com /support /coverage /4g-lte-cellspot

  5. Cellular frequencies in the United States - Wikipedia

    en.wikipedia.org/wiki/Cellular_frequencies_in...

    As cellular mobile telephone technology has evolved over time, periodically bands of frequencies are reassigned from other radio services. Companies wishing to provide cellular services in a geographic region compete for the right to license radio spectrum in spectrum auctions. Different cellular companies in the same region may use different ...

  6. Coverage map - Wikipedia

    en.wikipedia.org/wiki/Coverage_map

    A coverage map may be produced to indicate the area in which a certain signal strength is delivered. [1] Even if it is 100% accurate (which it never is), a major factor on whether a signal is receivable depends very much on whether the receiving apparatus is sensitive enough to use a signal of that level.

  7. T-Mobile's $4.4B US Cellular And TDS Deal Promises ... - AOL

    www.aol.com/t-mobiles-4-4b-us-141238919.html

    T-Mobile US, Inc (NASDAQ:TMUS) agreed to acquire substantially all of United States Cellular Corp’s (NYSE:USM) and Telephone and Data Systems, Inc. (NYSE:TDS) wireless operations, including ...

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