I have had my iPhone 4Gs for a few weeks now. It is making random calls. People have called me and said that they were returning my call but I didn't call them. I thought maybe it was because it was in my purse and hitting something causing it to dial out (even though I always lock it). Well, now I know that is not the case because both my sister and my daughter received a call from my phone today at 1:20 a.m. (4 seconds long) and 1:23 a.m. (5 seconds long). I was in bed sound alseep. The phone was on the charger and everyone in the house was asleep at the time. Has anyone else have this happen?