I have a 32gb white iPhone and I was wondering if it is possible for me to request a black iPhone when I exchange it due to the light bleed in the top right section of the screen. I got it from Verizon, but I figured that the way they would do a warranty replacement would involve mailing it to apple and apple mailing me one. I figured I would cut out the mailing and just go to an apple store. Would this work? Also, I have never really gone to an apple store to buy something before. (always got my mac at bestbuy and iPhone from Verizon) Do I have to make an appointment at a genius bar to talk to someone about a warranty replacement, or can I just walk in and ask for a new one whenever?