I try to wait until my phone tells me my battery is low to charge. When I went to bed last night, my phone still had 1/2 the battery life left so I did not bother to plug it in. When I got up and went to use my phone, it had shut off during the night. Like any normal person I tried to charge it- no luck. The phone would not charge and would not turn on. I removed the battery and replaced it. Luckily it turned back on and I still had 1/3 of my battery life left. Has anyone else had this issue? It has randomly rebooted, but I've never encountered this before where the phone just shut down completely into a hard lock. Anyone else? What did you do? Did you have it replaced?