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  2. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks. This is in contrast to a phone (retrospectively called SIM-free or ...

  3. eSIM - Wikipedia

    en.wikipedia.org/wiki/ESIM

    An eSIM is not removable. An eSIM (embedded SIM) is a form of SIM card that is embedded directly into a device as software installed onto a eUICC chip. First released in March 2016, eSIM is a global specification by the GSMA that enables remote SIM provisioning; end-users can change mobile network operators without the need to physically swap a ...

  4. SIM card - Wikipedia

    en.wikipedia.org/wiki/SIM_card

    A typical SIM card (mini-SIM with micro-SIM cutout) T-Mobile nano-SIM card with NFC capabilities in the SIM tray of an iPhone 6s cell phone A SIM (Subscriber Identity Module) card is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone ...

  5. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    List of mobile virtual network operators in the United States. Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country— AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon —and offer various levels of free and/or paid talk, text and data ...

  6. International Mobile Equipment Identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    The International Mobile Equipment Identity (IMEI) [1] is a numeric identifier, usually unique, [2][3] for 3GPP and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone but can also be displayed on-screen on most phones by entering the MMI Supplementary Service code *#06 ...

  7. T-Mobile US - Wikipedia

    en.wikipedia.org/wiki/T-Mobile_US

    T-Mobile US, Inc. is an American wireless network operator headquartered in Bellevue, Washington. Its largest shareholder is Deutsche Telekom, a company that operates telecommunications networks in several other countries. T-Mobile is the second largest wireless carrier in the United States, with 127.5 million subscribers as of September 30 ...

  8. Type Allocation Code - Wikipedia

    en.wikipedia.org/wiki/Type_Allocation_Code

    The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices.. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network.

  9. TruConnect - Wikipedia

    en.wikipedia.org/wiki/TruConnect

    TruConnect was the first prepaid broadband provider in the U.S. to offer a pay-as-you-go, portable Wi-Fi service plans. [1] The only Lifeline provider (ETC) headquartered in Los Angeles, CA. TruConnect uses either Verizon's and/or T-Mobile's network depending on location. TruConnect was founded by Matthew Johnson and Nathan Johnson and provides ...

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