I recently unrooted using the stock restore GC01 method about a week ago. I don't know if that has anything to do with what unfolded last night. I plugged my phone in to charge before going to bed last night and left it on. At 2:40 last night a sound that sounded like a cat dying (a sound I don't ever want to hear again) blasted from my phones speaker for about 6 minutes straight. During this time I couldn't shut my phone off or do anything to stop the noise. It was the highest pitch I've ever heard and definitely woke myself and my girlfriend up and scared the crap out of us. Even holding the power down button didn't work. That sucked. This morning there was no damage to the speaker and I have no idea how to replicate the death scream and the phone is fine. What in the....?