This is a complete 8-pin breakout board for the SIM card slot, which can directly access the SIM card communication.
Product feature: The breakout board was originally designed for the SIM card socket, with a switch for card detection. Since then, we have switched to a socket that does not have this function, so the SW1 and SW2 pins are not interrupted and can be considered as NC. However, these 6 SIM card pins can still be disconnected correctly.