i ask for your expertise....got this problem with my iPhone.
i have upgraded to version 1.1.3 via itunes about a week ago by accident!

Now my iPhone is locked.! previously to the accidental upgrade. i was running 1.1.1. jailbroken
i have managed to downgrade it to 1.0.2 now the problem is unable to unlock it! i have tried to use jailbreak with out no luck!
everytime i connect to "install appsnapp" via jailbreak.com it crashes!
because its design for appsnapp for 1.1.1 not for 1.0.2
my question how do i unlock it ? 1.0.2? is there a way?
please help another iPhone lover!
many thanks