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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. 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]

4. 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.

5. Metro by T-Mobile - Wikipedia

   en.wikipedia.org/wiki/Metro_by_T-Mobile

   Metro by T-Mobile, formerly known as MetroPCS, and simply known as Metro, is an American prepaid wireless service provider and brand owned by T-Mobile US.It previously operated the fifth largest mobile telecommunications network in the United States using code-division multiple access (CDMA).

6. T-Mobile rebrands MetroPCS, launches two prepaid ... - AOL

   www.aol.com/news/t-mobile-rebrands-metropcs...

   Five years after acquiring MetroPCS, T-Mobile has fully rebranded its prepaid brand towards a more premium marketplace. Metro by T-Mobile, as the company is now known, has announced two new ...

7. Central Equipment Identity Register - Wikipedia

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

   For example, the subscriber number , which is bound to the IMEI, the ID of the individual (passport data, National ID, etc.) who registered IMEI in the database, details of the importer who brought the device into the country, etc. Originally abbreviation CEIR stood for IMEI Database, created and provided by GSM Association. It was proposed to ...