I got my iPhone 4S today which I'm really happy about and now it's time to sell my iPhone 4 that I am replacing. It is on iOS 5 and I just erased it, but when I go to set it up, ideally so it's like an iPod Touch, it keeps telling me I need a SIM in it to activate it. I don't want to sell it with the SIM nor have any data pulled from the SIM onto the iPhone...is there any way to activate this thing without a SIM? Or is it actually safe to activate with my old SIM and then just remove it while not leaving any phone number or info behind? Thanks!