Hi all. After much much much searching to no avail I have finally resorted to asking for help. I was recently able to have my iPhone 3g early termination fee waived after a contract dispute with AT&T. Consequently I now own my beloved 3g outright. After seeing all the sky high prices on eBay I have decided to sell the new 3gs and continue to use my 3g when resigning back up. My question is this. Since I am purchasing a new 3gs for the $199 price, can I immediately put that 3gs sim into my 3g and sell the 3gs? Technically I am still using an iPhone. I just wanted to know if I MUST use the new 3gs and sell the 3g. I would rather kelp my old 3g and sell the 3gs for profit. Thanks in advance. Any help is appreciated.