Mini-SIM (2FF, Second Form Factor, 25 x 15mm) was the standard SIM card from the 1990s to the 2010s. Still widely used in IoT devices, tablets, and mobile routers where Nano-SIM is not required.
| Pin | Name | Function | Type |
|---|---|---|---|
| C1 | VCC | Supply voltage 5V 3V or 1.8V | PWR |
| C2 | RST | Card reset | I/O |
| C3 | CLK | Clock | BUS |
| C5 | GND | Ground | GND |
| C7 | I/O | Bidirectional data | BUS |
Mini-SIM (2FF, Second Form Factor, 25 x 15mm) was the standard SIM card from the 1990s to the 2010s. Still widely used in IoT devices, tablets, and mobile routers where Nano-SIM is not required.