Hi all

Apologies if this question has been posted before, but I searched round the forums and couldnt find an exact answer.

Basically, I had a jailbroken (cydia) iphone running 3.1.2, which was updated to 3.1.3 and 05.12.01 firmware, and could no longer be unlocked. Just today, I reconnected it to my PC and am given the option in itunes of "Restoring from the backup", a backup file which itunes made of the iphone before it was upgraded. My question is, if I go ahead and restore it to this version, will the software and firmware versions restore also, thus I will be able to Jailbreak again?

Thanks for any help ro advice anyone can give