Yesterday my iPhone clock was suddenly 4 minutes slow. I was very confused when going on my lunch break. During my break, it fixed itself, but then around 8:00 it messed up again. This morning it fixed itself yet again, only for a little while though when it started running 4 minutes slow again. I have tried respringing, rebooting, putting it into airplane mode, and turning off 3G with no luck. Does anyone know what's going on and how to fix it???