How to Jailbreak iPhone 3G running iPhone OS 3.1.2 Using PwnageTool 3.1.4

News | Saturday October 17 2009 2:03 PM | Comments (0) Tags: , , , ,

Hacking your iPhone could void its warranty. So please proceed with caution and at your own risk.
users. We’ll publish the guide
and iPhone 2G users shortly.
. It allows you to only jailbreak your iPhone 3G by allowing you to create a pre-jailbroken
.4. But as it also preserves your iPhone ’s baseband from getting updated so that you can use
to unlock it.
This guide cannot be used to downgrade your baseband from 05.11.07 to 04.26.08 (currently there no method away to downgrade the baseband from 05.11.07 included in iPhone OS 3.1).
. You'll need to reinstall them via Cydia.
The only way to update to iPhone firmware 3.1.2 and preserve baseband is by using the PwnageTool 3.1.4. PwnageTool is only available for Mac users, so Windows users who want to unlock their iPhone 3G should either get the custom firmware created by the PwnageTool on a Mac from someone they trust or borrow their friend's Mac and follow this guide.
1. Please take a backup of your iPhone , refer to
for more details.
2. Please download PwnageTool from any of these download links:
3. You need to download the iPhone firmware 3.1.2 file for iPhone 3G from
(iPhone 1,2_3.1.2_7D11_Restore.ipsw).
Create Custom Firmware 3.1.2 using PwnageTool 3.1.4:
1. Launch PwnageTool 3.1.4. You will see the following warning message, click OK.
2. Please select the Expert Mode from the menu bar in the next screen.
3. Then select iPhone 3G(S) (iPhone 3G(S) option is application for both iPhone 3G and iPhone 3GS) from the options presented and then click on the blue arrow button to continue.
4. You will see the “Browse for IPSW” screen. PwnageTool will automatically find the iPhone 1,2_3.1.2_7D11_Restore.ipsw file that you had downloaded on your Mac. If PwnageTool doesn't automatically find the ipsw file you can click Browse and select the file.
5. Click iPhone 1,2_3.1.2_7D11 to select the IPSW file, a checkmark will appear next to it. Then click the blue arrow button to continue.
6. In the next screen, select General and then click on the blue arrow button to continue.
7. The General settings allows you to decide the partition size (you have to increase the size of the root partition, 695 MB worked fine for us).
Keep “Activate the phone” option checked if you want to unlock your iPhone or deselect it if you are using an official iPhone carrier.
Click the blue arrow button to continue.
8. In the next screen, you will see the Bootneuter settings greyed out for the 3G iPhone . Click the blue arrow button to continue.
9. In the next Cydia settings screen; you can pre-install the packages in the custom firmware so you don't have to manually install them later. Select the packages and click the blue arrow button to continue
10. The Custom Logos Settings screen allows you to change the boot and restore logos. Once you have selected the boot and restore logos, click the blue arrow button to continue.
11. In the next screen, select Build and then click on the blue arrow button to continue. You will be prompted to save the custom firmware file, save it as iPhone 1,2_3.1.2_7D11_Custom_Restore.ipsw so that you differentiate the custom firmware file created by PwnageTool with the firmware file you had downloaded earlier.
12. While building the custom firmware, you will be prompted to enter a password. Enter your administrator password and then click OK.
13. You will then be prompted with following message:
Its safer to select “No”.
14. PwnageTool will put your iPhone into DFU mode (Device Firmware Upgrade mode). It will prompt you to turn off your iPhone 3G (ensure that it is connected to your Mac).
15. Then you will be prompted to hold both the Home and Power buttons for 10 seconds.
16. Finally, you will prompted to release the Power button while you continue holding down the Home button for another 10 seconds.
17. If it is successful in putting your iPhone 3G in DFU mode, PwnageTool will display the following message:
18. iTunes will also pop-up with the following message:
Select “Ok”.
Restore your iPhone 3G in DFU mode with Custom iPhone Firmware created using PwnageTool 3.1.4:
You can now use the custom iPhone firmware created using the PwnageTool 3.1.4 to restore your iPhone 3G in DFU on either Mac or Windows by following these steps.
1. Connect your iPhone to your Mac or PC and select your iPhone from the list of devices in iTunes.
2. In the Summary Tab, Hold down Option and press the “Restore” button. If you are using Windows hold down Shift and press the Restore button. (
This is a VERY IMPORTANT STEP as just pressing the “Restore” button will result in restoring your iPhone with the latest firmware which is firmware 3.1.2 currently, by holding down Option in case of Mac or Shift in case of Windows, allows you choose the custom iPhone firmware file.
3. You should be able to see all the older iPhone firmware files you had downloaded so far, select the
(iPhone 1,2_3.1.2_7D11_Custom_Restore.ipsw file) that was created earlier using PwnageTool to restore your iPhone 3G (
it’s important that you use the custom firmware file iPhone 1,2_3.1.2_7D11_Custom_Restore.ipsw
4. Once your iPhone 3G is restored, it will be jailbroken and updated with iPhone firmware 3.1.2 but the baseband will still be 04.26.08 (and not 05.11.07) so you can unlock your iPhone 3G using
. You can check it by going to Settings -> General -> About and looking for Version, it should be 3.1.2 (7D11) and Modem firmware should be 04.26.08.
5. The last step is to set up your iPhone 3G from a backup.
As always, don't forget to drop us a line to tell us how it goes.

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