Add solder to the pins before installing the new SIM socket.

The socket will have 8 signal pins on the side where the card is inserted, several pads for shielding, and two pads at the rear to detect whether the SIM is inserted.

To make the socket more stable, place the new socket on the board and solder at one shield edge first.

Solder the eight signal pins at PCB board edge. If you accidentally bridge some of the pins, don't panic. Use a solder wick to remove excess solder.