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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. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    For the other brands where the unlock codes are still based on algorithms those are based on the IMEI number and the MCC code and have been reverse-engineered, stolen or leaked. Some handsets can be unlocked using software that generates an unlock code from an IMEI number and country and operator details using the algorithm specific to the handset.

  4. Unlock - Wikipedia

    en.wikipedia.org/wiki/Unlock

    To undo a lock (security device); Phone unlocking, the removal of a SIM lock on a mobile phone; iOS jailbreaking, removing the limitations imposed by Apple, Inc. on iOS devices

  5. Lost your phone? Don’t freak out — here’s what to do - AOL

    www.aol.com/lifestyle/lost-phone-don-t-freak...

    The “Find My” feature on iPhone works even if the device is turned off or dead. Track your phone and wipe it remotely to prevent any info from being stolen. (Photo: Getty) (fizkes via Getty ...

  6. Unlocked iPhone FAQ, including AT&T plan info (updated) - AOL

    www.aol.com/news/2011-06-14-unlocked-iphone-faq.html

    Updated with information about AT&T plans. As we posted earlier, Apple is selling an unlocked version of the iPhone in the US starting at US$649. To help clarify questions about this development ...

  7. 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.