Hello, I have got my new iPhone 5S on friday and it's awesome. But I think i have got a defective device and need some advice from other iPhone 5 / 5S users if this is normal or not. First: The Power-Button is pretty loose and if shaken it sounds like a baby rattle . Its definitely not the camera lens which I know from my iPhone 4S. You can even hear it when the phone vibrates. Second: On tables or flat surfaces the phone spins like hell. You can even play spin the bottle with it. I mean I can live with both issues but my problem is that I will probably see shortly a pointed scuff on the backside. Video: http://www.youtube.com/watch?v=-1ETG61WSqA What should I do?