I have an unlocked Iphone with firmware 1.0.2.
All of a sudden it started to behave strange:
1. Sim card get's not recognized at all. The signal strength bar is basically a flat line. no carrier logo. but no messages (nothing like "No Service" or "No SIM installed).
2. Mail application quits approx 1. second after I started it without any message.
3. No sound anymore

It was unlocked only once and seemed to work fine for almost two weeks.

Do you guys think a restore to 1.0.2 (or even virginize) will help here or does it sound more like a hardware problem.