I just came back from a trip and my iphone can't pick up any wi-fi signals. I am still currently on 3.1.2. Haven't updated anything over the trip. Earlier in the trip, the phone was able to pick up wifi. I noticed after I restarted the phone later, it would pick up. But a few days have passed and after several restarts, the phone doesn't recognize ANY wi-fi signal. I was wondering if there's a possible fix? or a complete restore? obviously i would avoid this situation if possible. Any help would be appreciated! thanks!