ok so i just dropped my iPhone...on cement, in which it landed facedown (it was naked btw) So i pick it up and inspected it for damage. No cracks it seems. But i DID notice a small, brownish white dot. I don't think its a crack because when i run my finger nail over it, its smooth. And i it seems to small to be a crack. So im guessing that this is a crumb (it was on a napkin full of crumbs, which i grabbed, causing it to fall). If i bring my phone back to apple (3GS, still under 1 year warranty) what will they do? Will they replace it for free? Clean it? Is it one of those situations where I have to get lucky to get it fixed for free? thanks!