I got my C6 two days ago, and already there is a problem with it... I was playing around with it, and it had three bars, and then it turned off. I charged it, and after 5 minutes I was able to turn it back on again, and it said it was fully charged. A few minutes later, I turned the screen on, and when i tried to turn the screen on nothing happpened. So i had to charge it again... and once again, when i turned it back on it said it had full bars. What is wrong with it?