- SIM stands for Subscriber Identity Module.It is one of the most important part of any mobile phone. In some countries it is also known as ICC (Integrated Circuit Card) and UICC (Universal Integrated Circuit Card).
- SIM Card is basically a microcontroller-based access module or a small portable memory chip that stores information about the mobile phone user, a 16-digit or 17-digit code to identify its country of origin
- SIM Cards are available in 3 basic sizes: Standard, Micro, and Nano.
- Types of SIM Card
- GSM:-Global System for Mobiles
- CDMA:-Code Division Multiple Access
- eSIM Card
- SIM Card Parts and Function
- VCC (Power Supply)
- RST (Reset)
- CLK (Clock)
- D+ and D- (Optional USB Pad)
- GND (Ground)
- VPP (Voltage Programming Power)
- SIM Data I/O Pin
