Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_6 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8E200 Safari/6533.18.5) I just got an iPhone 4 about a week ago, I love it. But I've had some troubles with it. Twice now, after I press the lock button on top, the screen will shut off as it should. But I try to unlock the screen, it's won't turn on, it stays unlit and I have to reset it with the home and the lock button. Is this a common problem? It's still under warranty by Verizon for the first month, should I just take it back and get another?