I am an idiot and upgraded my white iPhone 3G to iPhone OS 3.0 BETA. I've tried countless different times to get my phone back to Normal iPone Firmware 2.2.1 and I cannot. With that being said, I would like to purchase a new iPhone. My iPhone even before i screwed it up with 3.0 BETA has been really messed up, I cannot use EDGE network anywhere, and my service will drop periodically every 2 minutes. I would like to buy a new iPhone. Could I just stroll up to the AT&T store and buy a refurb 8gb for $100 and use my SIM card? Will I have to resign a new 2 year? any comments would be appreciated. thanks.