Look, we all put our 3G's and 3Gs's into cases so the plastic back wouldn't get scruffed up. We didn't have to so much with the 4's because of the glass front/back. With the 5,..... so go get a case and put your phone in it, and get on with life. Things we use will show wear, that's just how it is. (Dinged/marred out of the box, on the other hand, is a whole different quality control topic!)