I bought the white iPhone 4 and I'm not sure if it's just my phone. Return policy expires tomorrow and I don't want to check their display models since it's far away. But does anybody have discoloration on their screen? Not the black screen itself, but the white part. I have a grayish hue around the rim of the black screen. Maybe it's just the board behind the screen, I don't know. I hope I'm not the only one. Can someone confirm?