Hello all, Recently I traded my white iPhone 4s for a black one off Craigslist. It's a step up for me because this phone has Applecare+ whereas mine didn't. However, there are a bunch of hairlike scratches on the back. I'm guessing the previous owner didn't take off the case a few times to clean the backside from dust and stuff. Anyways, I want to get a refurbished replacement at the Apple store, but I don't kow what to say. Will they let me get a replacement because I have Applecare+? If not, then what should I say so that I do?