FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Definition(s): An integrated circuit card that securely stores the international mobile subscriber identity (IMSI) and the related cryptographic key used to identify and authenticate subscribers on mobile devices.

Detailed explanation-2: -International Mobile Subscriber Identity (IMSI) is a smartphone’s identifier typically provisioned in the subscriber identification module (SIM) which is an integrated circuit that securely stores the IMSI and the related key used to identify and authenticate subscribers on mobile telephony devices.

Detailed explanation-3: -An IMSI is a unique and automatically generated code stored in the SIM that identifies every mobile phone subscriber on any network globally. The number is stored on the SIM card itself and is not moved or changed when that mobile number (MSISDN) is ported to a different SIM card.

Detailed explanation-4: -The SIM card file system is organized in a hierarchal tree structure and resides in the EEPROM for storing data such as names and phone number entries, text messages, and network service settings.