I have a 3g 8gb i phone with 3.1.3 (7e18) firmware and 5.12.01 modem firmware.
I have never jail broke this i phone but i want to. From what i have read and tried apple has stopped signing the firmware 3.1.2 which makes it impossible to download, but in the posts it says that 3g's do not have to have signed firmware. I have tried to (shift) restore my i phone back to 3.1.2 and receive error code 1015???? I don't know what to do any help would be appreciated. I don't know if there is a way to accomplish this or if i have to wait for a new jailbreak? Thank you.
ps I am using windows vista for my i tunes.