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IMSI

An IMSI (International Mobile Subscriber Identity) is a unique 15-digit code used to identify an individual user on a GSM network.

An IMSI consists of three components:

  • Mobile Country Code (MCC)
  • Mobile Network Code (MNC)
  • Mobile Subscriber Identity Number (MSIN)

The IMSI is stored in the Subscriber Identity Module (SIM).

The IMSI is used to generate the TIMSI.

Discuss IMSI in the forums.