I have two problems on my iPhone 4, proximity sensor is completely flawed, every call the screen comes on and I hit either end call or mute, second is the home button needs to be hit 3-4 times to recognize one hit. So I would just go to the Genius Bar and get it swapped, but since I'm still under the 30 days, why not just return and buy a new one, that way I get new accessories, and the serial numbers match. If the Apple store has one in stock, any reason why this shouldn't work? Will AT&T get involved at all? Thanks