Ok, im from ohio and i have an iphone 4, im currently in new york till end of august, i want to sell my iphone on ebay and get the desire, now i would have to take out the micro sim card and send it out. Now heres my question, when i get the desire can i take the desire to an att store and get a new sim card for it? Or do i need to be in ohio? Also do i have to pay? Thanks in advance.