I bought an iphone with 1.1.4 firmware already sim unlocked and jailbraked with installer. Now, iphone started acting up and it's not uncontrollable and I want to restore the iphone firmware with itunes. I'm assuming that if I restore the through itunes not 21/07/2008 it will install 2.0 firmware. Pwnage tool was already relased so I could use that. So will that work? Will my iphone be still unlocked to any sim card at the end of it all? I heard on other websites that if you jailbrake your iphone you cannot update iphone. Is that true? By the way I don not know how my iphone was jailbraked through Ziphone or what else.