The phone began just randomly turning off now the screen brightness is all the way down and i can barely see anything. I have already checked the settings and messed with the brightness but it wont work. The only thing that helps is sometimes when I'm sliding the phone open about halfway through the brightness will return. Help me! Is there anyway I can get a free replacement? I never know when i get a call or text because it just randomly turns off and even when it's on I cant see anything! Thanks!