I never had an issue with my first gen iPhone, the thing was a tank. Two or three weeks into my ownership of the 3GS, the vibrate sounds different, more hollow. If I tap the back lightly at the Apple logo you can hear something rattling around. Just looking for suggestions, deal with it? Take it to Apple? Take it to AT&T (pretty sure they wont do anything...)? Or is this something I just had not noticed and happening with most of them? Edit: Did some searching and it looks like most are saying its normal/this isn't normal. What is weird to me is this is new with my phone. Prior to this the vibrate sounded like it did in my 2G phone and I never noticed a rattle. Thanks!