Could this be a manufacturing issue? My phone rattles when gently shook and when I need to type/tap the top portion of the screen (camera off). Interestingly the rattling goes away when the camera is turned on/activated after some experimenting. I'm debating whether if this a normal issue (Samsung support rep told me "it's normal") or if I should contact Samsung/T-Mobile (my carrier) support to investigate if it's a manufacturing issue. I preferably want to do it within their timeframe for claiming this "issue" in regards to the warranty as I do not want to send the phone in, get a temp replacement, and then get my original phone back with a service bill with the msg "nothing is/was wrong, pay service fee, and send replacement phone back." I'm going to wait a couple more days to see if there is any advice/info that pops up on the web. If not, T-Mobile support here I come.