I was on the phone with someone and as soon I hanged up the phone it went blank. I tried everything, held the power button down for 32sec, held down the power button and volume button as well. When I plug it in to a charger it will show a solid green light and the battery sign showing a 100%. Also, is there a way I can retrieve anything off the phone with it not coming on? Is it possible anyone can help me with this problem?