1. Sim Card Definition

Your SIM serial number (SSN), sometimes called the ICC-ID (Integrated Circuit Card ID), is for international identification. The SNN typically has 19 digits and contains specific details about your operator, your location, and when it was made. The first two digits are the telecom ID, the second two digit refer to your country code, the third two digits are the network code, the next four digits are the month and year of manufacturing, the next two digits are the switch configuration code, the next six digits are the SIM number, and the last digit is the check digit.

Sim Card Definition

Contents • • • • • • • • • • • • • SIM-Subscriber Identity Module The UICC (Universal Integrated Circuit Card) is a smart card which contains account information and memory that is used to enable GSM cellular telephones. One of the applications running on the smart card is the SIM, or Subscriber Identity Module. In common parlance the term 'UICC' is not used an the phrase 'SIM' is used to describe the smart card itself. Because the SIM is just one of several applications running on the smart card, a given card could, in theory, contain multiple SIMs. This would allow multiple phone numbers or accounts to be accessed by a single UICC. This is seldom seen, though there is at least one '12-in-1' SIM card being advertised at present.