How can I downgrade my iPhone 3G 4.0 to OS 3.1.2?

daniel

Active member
I want to jailbreak my iPhone 3G. It is currently OS 4.0. I heard that to jailbreak it i would have to downgrade my iPhone. How do i do this?? I have a brand-new computer that i just synced it with, my old computer broke. Plz help me downgrade!!!!!!
 
Top