Sometimes I'll be on my iPhone doing whatever, and once I am finished I will click the lock button and the screen will go off. 5 minutes later, if I want to check the time or whatever, I click the lock button again, and the screen doesn't come on. I try again, nothing. Again, nothing. So every time this happens I have to do a hard reset. And it's starting to annoy me now because I've had it happen a lot lately. Anyone have a solution to fix this? Or is anyone else experiencing this problem?