Hello, bought an iPhone 3G from a friend at work for $20 because he couldn't remember his passcode.

The phone is unresponsive to the 2 buttons (sometimes). It's on, and can accept calls, but the buttons do nothing (sometimes) The only way I can get the screen to light up, is to continully press buttons. At some point one of them will work, but once it's lit up, I can't turn it off or do anything because it is still passcode locked. I want to just restore it, and that would be simple if the buttons were responsive. I did order a new battery for it, but it shows a full battery on the lock screen. I'm at a loss unless all of the buttons are randomly broken/shorted out/dirty inside.

Twould be an odd coincidence....