Foil over sim card

Solution
Did you get the phone used? Or did you perhaps send it to a tech to get it looked at? I ask because it sounds like someone used it as a cheap way to make the pins (which may be damaged, in the slot connect. Or even to make a sim fit more snugly in a loosened or damaged slot.

A good tech would just replace the damaged part and no more problem. So I would be curious as to who did it, and when.
Did you get the phone used? Or did you perhaps send it to a tech to get it looked at? I ask because it sounds like someone used it as a cheap way to make the pins (which may be damaged, in the slot connect. Or even to make a sim fit more snugly in a loosened or damaged slot.

A good tech would just replace the damaged part and no more problem. So I would be curious as to who did it, and when.
 
Solution