Hey guys, my old iPhone 4s had the camera rattle, so I rang up Apple and the lady said to take it back because that shouldn't happen. I'm now waiting for my new iPhone to be delivered to my carriers store. After reading numerous threads, the camera rattle seems to be normal! I'm worried that my new 4s will be faulty, is there any tips of what I should check out in store? (Once I leave I'm not allowed to have a new iPhone as Apple have a 1 day guarentee ) I'm worried about getting the yellow screen issue, as my old iPhone was perfect. Thanks!