At first we need to understand SIM Pinouts:
Contact No | Assignment | Description |
---|---|---|
C1 | VCC | Power Voltage. |
C2 | RST | Reset Signal. |
C3 | CLK | Clocking Signal. |
C4 | RFU | Reserved for Feature Use. |
C5 | GND | Power and Signal Ground. |
C6 | VPP | Programming Voltage. |
C7 | I/O | Serial Data input/output. |
C8 | RFU | Reserved for Feature Use |