I've used several iPhones now, and I have noticed something interesting. On some phones, the iPhone, serial number, etc. engraving on the back of the phone looks brilliant, sharp and clean. However, on some it looks blurry. I even have to adjust my eyes cause my brain thinks it's me looking at it strange. Just thought I'd mention it! Not a big deal, but I do prefer the sharp, clean cut. I'll try to take some pictures later and show what i mean.