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  2. International Mobile Equipment Identity - Wikipedia

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

    The last number of the IMEI is a check digit, calculated using the Luhn algorithm, as defined in the IMEI Allocation and Approval Guidelines: The Check Digit shall be calculated according to Luhn formula (ISO/IEC 7812). (See GSM 02.16 / 3GPP 22.016). The Check Digit is a function of all other digits in the IMEI.

  3. Bootloader unlocking - Wikipedia

    en.wikipedia.org/wiki/Bootloader_unlocking

    When Motorola released a bootloader unlocking tool for the Droid Razr, Verizon removed the tool from their models. [10] In 2011, Sony Ericsson released an online bootloader unlocking tool. [11] Sony requires the IMEI number to be filled in on their website. [12] For the Asus Transformer Prime TF201, Asus has released a special bootloader unlock ...

  4. Central Equipment Identity Register - Wikipedia

    en.wikipedia.org/wiki/Central_Equipment_Identity...

    To avoid confusion the database of GSM Association was renamed to IMEI Database - IMEI DB [1] (it was in 2003-2008, see “Document History” at IMEI Database File Format Specification [2]). Also sometimes a common IMEI database for several EIRs is called SEIR (Shared EIR). In each country, the CEIR can interact with IMEI DB differently.

  5. 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.

  6. 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.

  7. Verizon's network is back up. Here's a fix if your phone isn ...

    www.aol.com/news/verizons-network-back-heres-fix...

    Verizon said its network is fully restored, returning mobile phone service to customers across the country after an outage on Monday that left many people unable to make or receive calls for much ...

  8. AOL Mail for Verizon Customers

    help.aol.com/products/aol-mail-verizon

    AOL Mail welcomes Verizon customers to our safe and delightful email experience! Check your Mail Try the AOL app Get Ad-Free Mail Get Desktop Gold Why can’t I sort email by the header?

  9. Mobile equipment identifier - Wikipedia

    en.wikipedia.org/wiki/Mobile_equipment_identifier

    It consists of three fields, including an 8-bit regional code (RR), a 24-bit manufacturer code, and a 24-bit manufacturer-assigned serial number. The check digit (CD) is not considered part of the MEID. The MEID was created to replace electronic serial numbers (ESNs), whose virgin form was exhausted in November 2008. [1]

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