I have a Samsung phone with Android 5.0 I had 12% charge on my battery and was talking on the phone when it died I put it on charger and 20 minutes later still no charge. It wouldn't turn on so I did the push power/volume thing to go to factory menu. Instead of going to this screen a gray screen with white letters popped up saying that if I created a custom OS I could have troubles and that I had no OS anymore i ended up being able to reboot phone to factory eventually. When I was at AT&T I described this they said they have never heard of it does anyone know what happened? Was this done remotely somehow or did my phone do it to itself?