I ended a phone call and my phone had 90% battery life and the screen went black. The phone was completely shut off. I could not turn it back on. I was 1/2 hour from home. Pulled over and held the on off button...nothein. Tried for 15 minutes and it would not turn on. Took out the battery and put it back in. It was as if the phone had no battery in it at all. Got home and plugged in the usb charger and it restarted. Anyone else have this issue? I can't live with a phone that won't turn back on.