SIM Card Abbreviation and Much More

Prevention of misusing SIM card comes with the better knowledge of SIM Card, So here you go...

Subscriber Identity Module:

a. A subscriber identity module or subscriber identification module (SIM) is an integrated circuit that securely stores the international mobile subscriber
identity (IMSI) and the related key used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers).

b. A SIM circuit is embedded into a removable plastic card. This plastic card is called a "SIM card" and can be transferred between different mobile devices. A SIM card follows certain smart card standards.

c. A SIM card contains its unique serial number (ICCID), international mobile subscriber identity (IMSI), security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to and two passwords: a personal identification number (PIN) for ordinary use and a personal unblocking code (PUK) for PIN unlocking.

d. Except for emergency calls, a GSM mobile phone cannot be used without the SIM. The GSM terminology distinguishes between a mobile station and mobile equipment. The mobile equipment becomes a mobile station when the SIM is inserted.