How to Jailbreak iPhone 3G OS 3.1.2 on Mac

By Mac Hack PC 12 October 2009 View Comments

Recently Apple released the latest iPhone Software update OS 3.1.2, the latest firmware update contains a baseband firmware update 5.11.04 which is not compatible with Ultrasn0w. Which means if you upgrade your iPhone 3G 3.0 or 3.1 to 3.1.2 your baseband will also gets upgraded from Modem FW 04.26.08 to 5.11.04. When this happens, you can’t unlock baseband 5.11.04 with any utility in the present market. Thanks to Dev team, PwnageTool program let’s you update your main firmware without touching your baseband firmware.

We have put a simple step by step guide which will show you how to upgrade, jailbreak and unlock your iPhone 3G from Firmware 3.0 or 3.1 to Firmware 3.1.2 without upgrading your baseband.

If you a Windows user follow this link : How to Jailbreak iPhone 3G OS 3.1.2 on Windows

Dont’s:

Don’t update your iPhone OS from 3.0 or 3.1 to 3.1.2 using iTunes directly. (First we need to create a Costume firmware using PwnageTool and then update your iPhone with the custom firmware using iTunes)

Requirements :

iPhone 3G
Mac OS X Leopard/Snow Leopard
iTunes 9.0.1
iPhone 3G Firmware OS 3.1 - If you would like you can just Download the iPhone 3G Custom Firmware 3.1.2 and got directly to STEP ___
PwnageTool 3.1.3
PwnageTool-iPhone 2G-3G-3.1.2Bundles

There are two part to Unlock iPhone 3G.

Part One: (JailBreak)

Step 1: Download the required files and save them on your Mac (In a single folder).

Step 2: Extract PwnageTool 3.1.3 and install it.

Step 3: Extract PwnageTool-iPhone 2G-3G-3.1.2Bundles.zip.

Step 4: Two finger click on PwnageTool 3.1.3 icon and choose “Show Package Contents”

Show Package Contents

Step 5: Go to Contents >> Resources >> FirmwareBundles

Step 6: Copy all PwnageTool-iPhone 2G-3G-3.1.2Bundles files into the above folder.

Pwnage Tool 3.1.3 iPhone 2G 3G Bundle files

Step 7: Now close all folder and running application and start PwnageTool 3.1.3

Step 8: Choose your Mode (Simple or Expert – In this post we are using Expert mode)

Step 9: Choose your iPhone (That is iPhone 3G – Which is on the right corner. Once you select your iPhone you will see a Green check mark like this.)

Step 10: Click the blue arrow button at the botton right corner.

Step 11: PwnageTool will start looking for .ipsw file in your mac automatically. (If not, nothing to worry – browse it your self by clicking on the “Browse for IPSW…”).

IPSW file iPhone 3G

Step 12: Select the .ipsw file and click blue arrow button (Make sure you select the right one. If not, it will give an error warning).

Step 13: Select “General” and click next. (The General settings allows you to decide the partition size, Activate the phone and Enabled baseband update. The most crucial step of your process. So, just be careful.)

If you are using an Official service provider (i.e. AT&T) you do not need to “Unlock Baseband”, therefore you can Uncheck “Activate the phone” and Check “Enable baseband update”.

If You are using an Unofficial service provider (i.e. T-Mobile) then Uncheck “Enable baseband update” Keep in mind that “Activate the phone” will not work on the iPhone 3G (settings will be grayed out) as of the time of this post – you will need to read our ultrasn0w guide to unlock your iPhone.

Step 14: Next window is Bootneuter (Leave it as default setting). Click blue arrow button. (Nothing should be checked)

Step 15: The next window “Cydia Settings”.

Click to select the Download packages tab. Then click the Refresh button to display all the available packages. Double clicking the package you want will download it and make it available in the Select Packages tab.
Checkmark the ones you want then Click the blue arrow button.
The Custom Packages Settings menu displays listed package settings for your custom IPSW. For know leave these settings as is. Click the blue arrow button to continue.

Step 16: The “Custom Logos” Settings menu allows you to add your own images, you can pick your custom logo settings. If you uncheck them both, the originals will remain. Once done click the blue arrow button to continue.

custom boot logo iphone

Step 17: Now you are now ready to begin the Pwnage process. Click the “Build” button to select it then click the Blue arrow button to begin building custom IPSW file.

You will be asked to enter your administrator password. Do this then click the OK button.
This process may take about 10 minutes. (Mine took about 4 minutes)

Step 18: Here you will be asked a question “If your iPhone has Pwnage before? “- If you are not sure about this question please click “NO”. We recommend “No” in both the cases.

Step 19: Here is the most important steps since the PwnageTool take your iPhone into a repair mode, called “DFU mode”, but then we need your help by pressing the buttons on/off .

Follow the instruction on your screen (or follow below steps)

First connect your iPhone to your Mac and press power button for few seconds. You will be asked to slide to power off. Slick it to power off your iphone.
Now Press both power and home button for 10 seconds.
After 10 seconds release the power button but keep holding the home button.
After few seconds you will be in DFG mode.

Step 20: Don’t worry if your timing goes wrong, because if you can’t do it at the right time Pwnage tool will ask you to try again. If everything worked fine, you will get into DFU mode and your iPhone is ready to be unlocked.

Step 21: Once you are successfully entered into DFG mode. Close PwnageTool application and start iTunes.

Step 22: Once you start iTunes you will get a messge asking you to restore. Click “Ok”.

Step 23: Hold “Alt/Option” key on your mac and click “Restore”.

Step 24: Navigate to the Custom IPSW file that you just build/(Downloaded custom firmware OS 3.1.2 and click open to restore this .ipsw file into you iPhone. This process may take about 10 to 15 minutes.