How to downgrade from 4.0 firmware to jailbroken 3.1.3 - NEWDownload Link File http://filesharego.com/algeSerrena/jailbroken
How TO DOwnload :
Just Fill The Surveys and Get The Download Link for free.
Downgrade from 4.0.
There may be other, simpler ways to do so, but after hours of testing this has worked for me twice.
-YOU WILL NEED SHSH FILES ON SAURIK'S SERVER FOR 3.1.3 AND 3.1.2.
-YOU WILL NEED TO EDIT YOUR HOSTS FILE TO BYPASS APPLE'S SIGNATURE.
Instructions:
To do this, you'll need the following:
blackra1n
3.1.2 FW for 3GS (this isn't tested on any other device)
3.1.3 FW for 3GS
Pwnage Tool 3.1.5
Small disclaimer - I downgraded to 3.1.3 first to try and jailbreak and was unsuccessful, so I then downgraded to 3.1.2 from 3.1.3 and then did everything listed here. I have been able to downgrade straight to 3.1.2 from 4.0 so I'm just assuming you will be as well. Also, just to cover the bases, if anything should go wrong, simply put the phone into DFU mode, and upgrade back to 4.0. Then follow the instructions from the beginning.
1. Plus the device into ...