How to Jailbreak Your iPhone 3G on OS 3.1.2 or 3.1.3 Using RedSn0w (Mac)

Posted January 31, 2010 at 6:58pm by iClarified | Please help us and submit a translation by clicking here | 108616 views

These are instructions on how to jailbreak your iPhone 3G on the 3.1.2 or 3.1.3 firmware using RedSn0w for Mac. If you are already on firmware 3.1.2, do NOT update to firmware 3.1.3. The Windows version of this tutorial is here. The iPhone 3GS version of this tutorial is here. The iPhone 2G version of this tutorial is here

This tutorial can be used to jailbreak before applying the BlackSn0w unlock. You can find instructions on how to apply the unlock here.

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 (3G): iPhone1,2_3.1.2_7D11_Restore.ipsw

Extract the redsn0w folder from the RedSn0w zip file to the Pwnage folder.

Step Two
***If you are running iPhone OS 3.1.2 or 3.1.3 you may skip this step***
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 Choose 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

Even if you are on firmware 3.1.3, still select firmware 3.1.2. Redsn0w works the same way on firmware 3.1.2 or firmware 3.1.3. If you select firmware 3.1.3, you will get an error, as Redsn0w does not recognize the 3.1.3 file yet.

Select the firmware ipsw we placed in the Pwnage folder on our desktop then click Open.

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

Step Seven
RedSn0w will now prepare the jailbreak data

Step Eight
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 320x480. If you would like to use the iClarified ones they can be found here: Boot Logo, Recovery Logo

Click the Next button to continue

Step Nine
Please plug your iPhone into the computer and make sure its OFF then click the Next button

Step Ten
RedSn0w will now guide you through the steps to get into DFU mode. You can find more help with DFU mode here

Hold down both the Home button and the Power button for 10 seconds.

Release the Power button and continue holding the Home button until RedSn0w detects the device.

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.

*As usual a big thanks to the iPhone Dev-Team for their hard work and contribution to the iPhone community.

Add Comment
Pam - October 29, 2010 at 4:00pm
I have Iphone 3g, 3.1.3 (7E18). I downloaded red snOw-mac_.0.9.4 and iPhone1,2_3.1.3_7E18_Restore.ipsw. On step 4 when I browse I get the message \"unable to recognize specified IPSW\" Does anyone know where I go from here? Thanks.
Pam - October 29, 2010 at 4:39pm
I reread the directions and recognized on Step 5 that I should download firmware 3.1.2 even if I have 3.1.3. So I did that, also downloaded via Firefox vs. Safari. Everything goes along fine. At the finish the iPhone looks like it\'s processing and after a few minutes it shows a black screen with an apple. After a few more minutes I get the slide screen with the itunes icon, identifying no sim card and only able to make an emergency call. Does anyone know why it\'s not working for me?
Pather - August 31, 2010 at 7:54am
Hi, i tried this tutorial, but when redsn0w starts rebooting device, it freezes and nothing else happens. I have iOS version 3.1.3 and I\'ve done everything I should... any tips?
Dave - April 25, 2010 at 4:08am
Hi, Thanks for this tutorial ... it totally worked for me unlocking 3G iPhone running 3.1.3. iPhone 3G Version: 3.1.3 (7E18) Carrier: Vodafone New Zealand Model: MB496X Modem Firmware: 05.12.01 I had tried using pwnage instruction on iclarified but the procedure did not work. My phone was jailbroken but I had No Service [no cellular network capability ... unable to make phone calls etc.]. I restored back to standard image (3.1.3 via iTunes) and then attempted this RedSn0w procedure and it worked first time. All I wanted was to be able to tether my iPad to iPhone and surf the net .... and after jailbreaking iPhone and installing MyWi I can do it and it works great !! Thanks DEV Team and all others involved in creating this jailbreak software ...
Pam - October 29, 2010 at 4:05pm
Hi, I have the same phone and I set up the Pwnage folder, downloaded redsnOw-mac_.09 and iPhone1,2_3.1.3_7E18_restore.ipsw. But on step 4 redsnOw is \"unable to recognize specified IPSW\". Any suggestions. Thanks.
cseeman - February 12, 2010 at 11:19pm
Curious why no tutorial for 3.1.3 Jailbreak yet. Is this coming? I can\'t seem to find it on iClarified
yoda - February 11, 2010 at 12:06am
Still not working...3G - 05.11.07
2 More Comments
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