Sunday, February 07, 2010

Guide to Unscrewed your 3.1.3 to 3.1.2

Firstly, you need to make sure you're using redsn0w version 0.9.4.

Download here:
http://modmyi.com/forums/downloads/firmware/6/iphone-3gs-3-1-2-32354/

Very important - You must have your SHSH on file with saurik and have already edited your hosts file prior to this document. (You can stop reading if you do not have it stored)

Add this to your hosts:
74.208.10.249 gs.apple.com

Now to begin:

-First, connect your iPhone to the USB and put it into DFU mode.

How to get to DFU Mode:
http://www.iclarified.com/entry/index.php?enid=1034

iTunes will display an alert stating you need to restore your device, click ok then hold (option + click restore for Mac) or (shift + click restore for Win)  and navigate to your previously downloaded 3.1.2 FW.

After the restore finishes again it'll have error 1015. That's normal.
Click ok and close iTunes. Activate redsn0w 0.9.4 and jailbreak as normal.

How to jailbreak using redsn0w 0.9.4:
http://www.redmondpie.com/jailbreak-iphone-os-3.1.3-firmware-with-redsn0w-0.9.4/

After the jailbreak is finalized your device should reboot and strange enough you successfully downgraded to 3.1.2.

PLEASE NOTE: AFTER THE FIRST JAILBREAK YOUR DEVICE WILL NOT BE JAILBROKEN.
(You are just on an un-jailbroken 3.1.2)

 

Now, you can follow this guide:
http://william-the-billionaire.blogspot.com/2010/01/how-to-jailbreak-your-iphone-3gs-312.html

 

Credit to Modmyi.com, redmondpie.com and iclarified.com

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