hi everyone. i picked up an iPhone 2g a few days ago with the intention of using edge blocker and jailbreak it. i run everything and it seems to work fine, but my SIM wasn't detected. Yes, i have AT&T. i realize then that the phone was in firmware 3.1.3. i did some research realized that i cant use it in my situation, so i downgrade to 3.1.2.run everything again....to no avail... still says no sim, no service. is there anyway to fully restore the iphone? i believe that the iphones internal memory is still on the newest firmware even though i downloaded 3.1.2. or at least that's what i have been told....please help: