Because I just walked into an AT&T store for something and I looked at two demo units, both at the same brightness and settings, identical everything (3GS 16gb black), and one was yellow as hell, and one was pure white. Mine, unfortunately, is yellow. The salesman also thought it was weird and said that if Apple would exchange it, I should do it. But since this would be a defect, I technically have the whole year, right? Thanks in advance.