Hi, got the situation: officially unlocked 3G, wich was upgraded with iTunes few months ago to 2.1and then jailbroken. It worked. Now upgraded to 2.2.1 trough itunes and QuickPwn 2.2.5 dosen' t worked for me - after jailbreaking wich went fine, no cydia and installer app. tried few times, the same.
Any ideas?