International Mobile Subscriber Identity (IMSI) is a unique identifier used Mobile Network Operators (MNO) to connect Mobile Device calls and communicate with the Mobile Device UICC cards.

The format is:

The International Mobile Subscriber Identity is normally there will be 10 digits but would be fewer in the case of a 3-digit MNC or if national regulations indicate that the total length of the IMSI should be less than 15 digits.

Digits are different from country to country.

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« This page (revision-3) was last changed on 14-Mar-2017 11:03 by jim