The number has sections like Issuer Identification Number or IIN, Individual Account Identification, Check digit, etc.Ģ. Integrated Circuit Card Identifier or ICCID – It is the Primary account number that has 19 digits long.
The SIM comes in various data capacities ranging from 32KB to 128K and can store 250 contacts.
The SIM also contains other data like Short Message Service Centre number or SMSC, Service Provider Name or SPN, Service Dialing Number or SDN, Value Added Service or VAS, etc. Micro sim has been invented for the latest mobile phones. Out of the many keys, the most important keys are ICCID, IMSI, Authentication key or Ki, Local Area Identification or LAI, and an operator-specific emergency number. The SIM card stores network-specific information to authenticate the identity of the subscriber in the network. Modern SIM cards allow the storage of application data that communicate with the handset or server using the SIM application tool kit. SIM card contains its internal memory in which stores the data, personal and financial information, identity for GSM/CDMA.
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The data stored in the SIM card includes a unique serial number called ICCID, International Mobile Subscriber Identity or IMSI, Security Authentication information, temporary information about the network, a Personal Identification Number or PIN and a Personal Unblocking code or PUK for unlocking.
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