In light of the recent release of the new version of the Dev Team’s jailbreaking program called Redsn0w which works with OS 3.1.2, here is a guide demonstrating you how to jailbreak your iPhone 3GS using Redsn0w on OS 3.1.2.
This guide is for Windows. For Mac go here.
Full credit for this guide goes to iClarified.com.
Step One
Create a folder on your desktop called Pwnage
Download RedSn0w from here and place it in the Pwnage folder. Likewise, download the latest 3.1.2 firmware from below and place it in the same folder.
3.1.2 (3GS): iPhone2,1_3.1.2_7D11_Restore.ipsw
Extract the RedSn0w executable from the zip file to the Pwnage folder.
Step Two
Connect your iPhone to the computer and launch iTunes.
Select your iPhone from the list of devices on the left. Now hold down shift and click the Restore button. Restore is preferred as it won’t create any wasted space on your iPhone.
Navigate to the Pwnage folder on your desktop and select the firmware ipsw. Click the Open button to continue.
Step Three
Once iTunes has finished updating your iPhone to the desired firmware you may launch redsnw0w.exe from the Pwnage folder on your desktop.
Step Four
Once RedSn0w opens click the Browse button
Step Five
Select the firmware ipsw we placed in the Pwnage folder on our desktop then click Open
Step Six
RedSn0w will ask you if this is a newer (fixed) model iPhone. Newer models of the iPhone 3GS have a fixed bootrom which requires you to connect your device to the computer each time you wish to reboot.
To find your serial number you can follow these instructions. The week number is usually the 4th and 5th digit of the serial number. For example, a serial number beginning with 88926 would be week 26 of 2009. 3GS units made week 45 or later will usually have a fixed bootroom. Before week 40 they usually have the older bootroom. Between weeks 40 and 45 the results vary.
If you believe your device has a fixed bootrom then press the Yes button. Otherwise press the No button.
If you accidentally select the wrong option you may have to do a full restore so please make this choice carefully.
Once the firmware has been verified click the Next button to continue.
Step Seven
Make sure Cydia is selected and click the Next button.
From this window you can select the jailbreak options you would like. If you have already pwned your device check the Already pwned option.
Verbose boot displays detailed information on boot of your device and is generally only needed by developers and advanced users.
Make sure Cydia is selected. For this tutorial we will also select Custom boot logo and Custom recovery logo.
When you click to select each custom logo option a dialog window will appear asking you to select the image. Locate the image you would like to use then press the Open button.
*Remember the rules for boot logos are: RGB or Grayscale format with Alpha channel and dimension below 320×480.
Click the Next button to continue
Step Eight
RedSn0w will now instruct you on how to put your iPhone into recovery mode. Disconnect you iPhone 3GS from the computer then power it off. Then hold down the Home button while reconnecting the device to the computer. Don’t let go of the button until RedSn0w detects the iPhone and begins installation.
Step Nine
Your iPhone will now reboot
Step Ten
RedSn0w will then begin uploading the new RAM Disk and kernel.
Step Eleven
Once this is complete you will be notified that RedSn0w is done. Click the Finish button. When your iPhone finishes rebooting (5 minutes or so) it will be jailbroken with Cydia on the SpringBoard.
[...] This guide is for Mac. For Windows go here. [...]
Thanks a lot it work now how to unlock the phone?
regards
Hanna
Add the following source to Cydia : blackra1n.com and then search for Blacksn0w. Download it, reboot your device and it will be unlocked.
When I open the firmware it just goes to my iTunes and does nothing.
Sorry if this has been covered, but I’ve looked everywhere and can’t find a definitive answer…
iPhone 3GS 3.0.1 (7A400) serial 87936 (older model from what I can gather) firmware 04.26.08
Already jailbroken using redsn0w….
I want to upgrade to 3.1.2 because of a couple of apps requiring 3.1; i’ve downloaded the 3.1.2 ipsw from links.
When I run the iTines step, do I point at the old 3.0 ipsw i used to jailbreak last time, or the new 3.1.2? And same in redsn0w – I guess i point at the new 3.1.2? I want to get this clear in my head so that I don’t screw up and find myself getting upgraded to 3.1.3 or something stupid. Incidentally, Cydia tells me i have shsh’s on file for 3.0 and 3.1.2, so I guess that’s good (if I knew what to do with them!)
Many thanks in advance for any help and thanks so much for the previous version I used to jailbreak on 3.0 – went like a breeze so hope this will too.
Ya you normally would simply SHIFT+Restore and point it to the OS 3.1.2 firmware file. But Apple have stopped signing the OS 3.1.2 so I don’t think it will work: http://blog.alltechrelated.com/2010/02/04/important-apple-stop-signing-os-3-1-2/
As you have a iPhone 3GS, there is not much you can do at the moment but make sure you do NOT update to OS 3.1.3 as you may loose your jailbreak forever. Just sit tight on OS 3.0.1 and wait for a future jailbreak. Sorry