Version 1 (modified by seskar, 4 years ago) ( diff )

LTE SIM Configuration

SIM Card Setting Intro

  • International Mobile Subscriber Identity (IMSI): 15 digit unique identifying number that is used to identify the subscriber to the service. Typically issued by the operator. IMSI consists of:
    • MCC: Mobile Country Code - identifies geographic region of the SIM card
    • MNC: Mobile Network Code - identifies the operator
    • MSIN: Mobile Subscriber Identifier - identifies individual subscriber

Typically MCC and MNC are 5, 6 or 7 digit combination leaving 10, 9 or 8 digits for the subscriber serial number.

  • Authentication Algorithm: A number of standard security algorithms are sued in cellular networks. The two that are related to SIM configuration are:
    • XOR - Mostly used for testing
    • Mileanage - Mostly used in production. Parameters stored in SIm realated to authentication are:
      • Ki: Subscriber Authentication Key (128 bit)
      • OP: Operator Code - same for all SIMs from a single operator
      • OPc: Derived operator code unique for each SIM

These keys should be validated before deployment.

  • Answer To Reset (ATR): Information message that helps reader access the card information (i.e. describes how to read the SIM card).

NOTE: International Mobile Equipment Identity (IMEI) is not related to SIM but is rather a unique identifier of the device.

ORBIT Configuration

We use AAAA SIM cards with the following:

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