Hi Guys, I'm thinking of returning my iPhone. But I don't know if I'm being too picky. When on silent, or switching my silent button (of course, the iPhone vibrates), but when it does.. it almost sounds like something is loose inside the device. Causing it to make an audible noise. It's hard to describe, but the only reason I'm thinking of taking it back it because I rely on my phone for my job. But even on silent, I, an my colleagues can hear it vibrating away.