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2. International mobile subscriber identity - Wikipedia

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

   Website. www .itu .int /rec /T-REC-E .212. The international mobile subscriber identity ( IMSI; / ˈɪmziː /) is a number that uniquely identifies every user of a cellular network. [1] It is stored as a 64-bit field and is sent by the mobile device to the network. It is also used for acquiring other details of the mobile in the home location ...

3. Central Equipment Identity Register - Wikipedia

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

   A Central Equipment Identity Register (CEIR) is a database of mobile equipment identifiers ( IMEI – for networks of GSM standard, MEID – for networks of CDMA standard). Such an identifier is assigned to each SIM slot of the mobile device. Lists of IMEIs may be the: White – for devices that are allowed to register in the cellular network ...

4. SHSH blob - Wikipedia

   en.wikipedia.org/wiki/SHSH_blob

   SHSH blob. In computing, a SHSH blob is a digital signature that Apple generates and uses to control the iOS versions that users can install on their iOS devices generally only allowing the newest iOS version to be installable. Apple's public name for this process is System Software Authorization (before iOS 7, System Software Personalization ...

5. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   SIM cards are identified on their individual operator networks by a unique international mobile subscriber identity (IMSI). Mobile network operators connect mobile phone calls and communicate with their market SIM cards using their IMSIs. The format is: The first three digits represent the Mobile country code (MCC).

6. Vivo (technology company) - Wikipedia

   en.wikipedia.org/wiki/Vivo_(technology_company)

   Vivo Communication Technology Co. Ltd. is a Chinese multinational technology company headquartered in Dongguan, Guangdong that designs and develops smartphones, smartphone accessories, software and online services. The company develops software for its phones, distributed through its V-Appstore, with iManager included in their proprietary ...

7. Luhn algorithm - Wikipedia

   en.wikipedia.org/wiki/Luhn_algorithm

   Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in U.S. Patent No. 2,950,048, granted on August 23, 1960.