I would like to sell my old phone and get the 3g. I am planning on selling the old one on ebay and then purchasing the new one and once the 3g is active I will ship the old one. I will time it out so the buyer isn't waiting long. I will sell it as an unlocked phone and I want to know if I should sell it with the SIM or take it out. Does the old sim go into the new 3g or is it a different sim? Thanks a lot.