Okay, I first got my iPhone and it didn't seem to have a yellow tint to it, now I feel like it does. The thing is, I did compare it to my friends new iPhone 3G (not S) and mine was fine, his wasn't. He said he didn't care. Now as time has gone on from usage from me, I feel like the screen has gone yellow now. So the question is, can it turn yellow or is it just out of the box that way?