So I have had my iPhone since the 7th of this month. It's a Black 16Gig 3GS, and I just woke up the other day and noticed there is this small but noticeable mark on my iphone's screen. I can't physically feel the mark with my fingernail so I don't believe that it can be a crack or a scratch. Do you have any idea?
Here are pictures:
Here are pictures:


