I had an activated 2G iPhone that was done through AT&T. I then went and got a new 3G iPhone. When I dock my older 2G iPhone... it asks me to activate again. I can say no of course and get into the phone itself... but can I upgrade to the new 2.0 firmware? Right now I am on 1.14 and can use the SIM card from the 3G and place it into the older 2G phone and use it with no problems. "If" I can upgrade to the 2.0... will I still be able to use the phone part too?