I will not be responsible for any damage done to yourself, the device, or any other object related the repair. Proceed at your own risk.

Replacing the SIM reader is not something you should rush. At every step, rest your tools on the table and stop to think, especially if this is your first SIM reader repair. Check connections and assess the situation at hand. Only after that, act. This is important, for if you pull pads, you're in trouble.