Glaxx
macrumors regular
As said before, the rattling is the camera, not the vibrate motor or switch. All iPhone 4s have this problem, but the degree varies. If you opt to go with a replacement phone, you're only going to end up with the same problem.
See here: https://forums.macrumors.com/threads/992481/
See here: https://forums.macrumors.com/threads/992481/