Since I called up customer service and they were clueless (as usual) I thought I'd ask here. Verizon is offering me $325 for my phone and I'd like to upgrade to the 5S. Am I supposed to restore the phone prior to going to the store? Or will they do it for me? I would basically like to give them my phone, get the credit, and then use that credit to get my phone. Any help is appreciated!