Last night I went to sleep and my phone was working''' perfectly'''. I plugged it up and went to bed. When I woke up this morning i found my LED flashing meaning I had a message. So I tried to turn my screen on. My screen wouldn't turn on. So, I took out the battery and put it back in to restart it. It won't turn on. I've tried taking the battery out, waiting 30 seconds, putting it back in and turning it on. Still nothing. Please help