I noticed the other day that my less-than-3-week-old iPhone 4 makes a rattling sound when shaken, as if there is something loose inside. I have been EXTRA careful with this phone and have never dropped it, so this worries me. I go back to school next week, where there is no Apple store within 100 miles, so if anything were to happen I wouldn't be able to quickly remedy the problem. I'm looking for opinions on what you think I should do. I have an appointment at the Genius bar tomorrow because I googled it and saw that others have done the same and had it replaced. Thoughts?