Today I used my phone for directions. Shortly after arriving I went back to my phone but I couldn't wake it. I didn't think it could be dead already but I plugged it in. Within a few minutes I tried to wake it and the home button was hot. Really hot. At work I stuck a thermistor to it and registered >130F. It stayed that way for over three hours until I got to the Apple Store where they took it and sent it off for repair. I've never heard of this issue. Any thoughts? Sorry if I'm reposting a similar thread; I looked but never came across one. . .