Hey guys, On my white iphone 4S today, I noticed a speck of white, that's the size of a pixel on my screen. It's not a dead pixel for sure because it still shows when the screen is off and so is the phone. I'm worried it might be a chip or a speck of dust. Should I go back to apple store to exchange it? Or an I OCD'ing about this. The thing is I paid nearly 750 dollars for this phone, and I want it to be perfect. I'm also not sure if they will exchange it for me since you still have to reserve iphone 4S in Canada to get them, and also because it's only one dot.