How to Jailbreak Your iPhone 3GS on OS 3.1.2 Using RedSn0w (Mac)


This tutorial can be utilized to jailbreak prior to making use of the UltraSn0w unencumber. &#a hundred and sixty;

Step One
Create a folder to your pc referred to as&#a hundred and sixty;Pwnage

Obtain RedSn0w from&#a hundred and sixty;right here&#one hundred sixty;and position it within the Pwnage folder. Likewise, obtain the most recent three.1.2 firmware from under and position it in the identical folder.

three.1.2 (3GS):&#a hundred and sixty;iPhone2,1_3.1.2_7D11_Restore.ipsw

Double click on the redsn0w zip file to extract the redsn0w folder 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 Option 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. 

*Note: If you are already on the 3.1.2 firmware and have not
jailbroken then you may skip this step.

Step Three
Once iTunes has finished updating your iPhone to the desired firmware open the Pwnage folder on your desktop and launch the redsn0w application from the redsn0w folder we extracted earlier.

Step Four
Once RedSn0w opens click the Browse button

Step Five
Select the firmware i
psw 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 belie
ve 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.

Step Seven
Once the firmware has been verified click the Next button to continue.

Step Eight
RedSn0w will now prepare
the jailbreak data

Step Nine
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 sele
ct 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 Ten
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 dev
ice to the computer. Don't let go of the button until RedSn0w detects the iPhone and begins installation.

Step Eleven
Your iPhone will now reboot

Step Twelve
RedSn0w will then begin uploading the new RAM Disk and kernel.

Step Thirteen
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.

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