We've all now heard about scuff marks and scratches out of the box... I have a small white mark on my black iPhone 5, but I can live with it... what is 'bugging' me a bit is that the SIM tray cover is a slightly different black/grey than the rest of the bezel/antenna. Not bothering me enough to get a new one, but I was just wondering, is this the same with all black iPhone 5's?