I pick up the phone a week ago and realized the phone is making some ratting sound at the top of the phone. I kind of investigated into it and found the problem can be reproduced easily by tapping area between the Apple logo and the camera lens with three fingers. It seems like there's a loose screw or something inside the phone. I called Apple Care and I spoke with a really helpful tier 1 advisor. He scheduled a Genius Bar appointment for me telling me that I should back up the phone since they may replace the phone. But I see that some users here are getting replacements delivered home. I am wondering what are the requirements for AppleCare to offer users replacements delivered since the agent I spoke with only offered the GB option. Do you have to ask for advance replacement or it's only for users who don't live close to an Apple Store?