The GF's 4s has stopped charging when switched on now - it has to be off to charge on either usb or mains. itunes doesnt detect it when it's plugged in, either. Other than the obvious inconvenient trip to the nearest Apple store to get it fixed, has anybody else got any ideas, anything we could try? I've had a google around it it seems other people have had this issue with the 4s as well as previous iphones but there isn't a lot of information on the problem or the cause of it. I'm guessing something to do with usb connectivity has died lol. It's only a few weeks old :/