Earlier today I was just messing around on my phone when out of no where it decided to restart. When it returned to the screen where I type in my pin, I tried typing in the numbers but the screen wouldn't respond. I also noticed my background didn't load and the message "No Service" was appearing, even though the icon said I had 3G with 2-3 bars. When the screen timed out I tried pressing the power button to awaken it but wouldn't wake up and stayed black. I noticed throughout this ordeal, the phone was hotter than usual. I pulled the battery a few times and restarted the phone but encountered the same issue. Interestingly, I did a soft factory reset and voila, everything worked again! This issue was strange to say the least. I'll monitor things for a few days, hopefully all stays well.