SIM Full Form– Subscriber Identity Module

What is the full form of SIM?

SIM stands for Subscriber Identity Module. Sim is also commonly known as the Subscriber Identification Module. It is a portable chip with an integrated circuit that securely maintains global mobile subscriber identification.

More About SIM (Subscriber Identity Module)

• The SIM is a smart card mostly used to make calls when inserted into a mobile device. It possesses an IMSI number (International Mobile and Subscriber Identity), a distinctive identifier that serves as a serial number for it, attributes for recognition and authorization, network data that is momentarily saved, and ciphering information.
• A SIM also keeps track of the services that its users have used. In addition, it is PUC (personal unblocking code) encrypted in order to enable PIN unlocking. 
• PIN and PUK unblocking keys are four to eight-digit passwords that are used to protect the SIM against unauthorized use. 
• Sim cards function as a small storage device for text messages and other important data. 
• Sim card interoperability enables them to be readily swapped between different mobile devices, provided the SIM card form factor and the cellular network are compatible.
• It has features such as a PIN code to protect the holder's account and personal information. 
• Because they are detachable, users can change devices or cell networks without fear of losing essential personal and account information. 
• It has a feature to operate and remotely update the SIM card's software or configuration and take measures such as deactivating the SIM card in case of loss or theft and maintaining mobile users' security and convenience.