Question. I have the Original 2G iPhone and now want to upgrade to the 3GS and sell my 2G (unlocked) online. If I purchase the new 3GS first and activate with my iTunes, then try to unlock the 2G phone, will I have any issues? Will this work? Or Do I have to unlock the 2G first using my iTunes, sell it, then buy and synch the new 3GS with my iTunes? Just not sure if there is a set way to do this...thanks!!