Hi, I have a problem. I have an iPhone 4 which I got from a friend. I dont know where he got it, but it was broken when I received it. I've installed a new screen and tried to fix it but I've encountered two problems: It's locked with a passcode, and the power button does not work (yet). I would like to wipe the phone and access it, if possible, before I fix the power button. Is there anyone who knows a solution?