Hi people!! I hope someone can help me with this dilemma... I just upgraded my Verizon iPhone 4 8gb to a Verizon iPhone 4s 8gb, and I received it today from Verizon and it's still totally sealed. However I have at home a different Verizon 4s 16gb (sisters) that isn't being used. Can I use my sisters old 4s and sell my new phone online? Or is my new phone pre-programmed with my number or info or something? Also, if you have any tips I should know before selling it, I'm all ears! I've never sold on Ebay before... I'm thinking $300... is that normal? Thanks u awesome people!! U rock!!!