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What does 'SIM' stand for in mobile phones?
- Single Identity Module
- Subscriber Identity Module
- Secure Information Memory
- System Integration Module
Answer: Subscriber Identity Module
SIM (Subscriber Identity Module) is a small chip that stores subscriber information, network authentication keys, contacts, and SMS. It identifies and authenticates users on cellular networks. eSIM is an embedded digital SIM that can be programmed remotely without physical card replacement.