How to Jailbreak iPhone 3G with OS 3.1 on MAC

By Mac Hack PC 17 September 2009 View Comments

Recently Apple released the latest iPhone Software update OS 3.1, 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 to 3.1 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 to Firmware 3.1 without upgrading your baseband.

If you a Windows user follow this link : How to Jailbreak iPhone 3G with OS 3.1 on Windows

If you are a iPhone 3G S follow these links :
How to Jailbreak iPhone 3G S on MAC
How to Jailbreak iPhone 3G S on WIN

Dont’s:

Don’t update your iPhone OS from 3.0 to 3.1 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
iPhone Firmware OS 3.1 – (DirectDownload1)
PwnageTool 3.1 – (Dire ctDownload1 / Direc tDownload 2 / D irectD ownload3 / DirectDownloa d4 / TorrentDownload1)

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).

iPhone1,2_3.1_7C144_Custom_Restore.ipsw pwnagetool 3.1

Step 2: Close all other running application.

Step 3: Double click to install PwnageTool_3.1.dmg and run PwnageTool application.

Step 4: Choose your Mode (Simple or Expert – In this post we are using Expert mode)

Step 5: Choose your iPhone (That is iPhone 3G).

Once you select your iPhone you will see a Green check mark like this.

Step 6: Click the blue arrow button at the botton right corner.
Step 7: PwnageTool will start looking for .ipsw file in your mac automatically. (if not, browse it your self by clicking on the “Browse for IPSW…”).

Step 8: Select the .ipsw file and click blue arrow button.

Step 9: 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 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 10: Next window is Bootneuter (Leave it as default setting). Click blue arrow button.

Step 11: 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 12: 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.

Step 13: 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 14: Here you will be asked a question. If you are not sure about this question please click “NO”. We recommend “No” in both the cases.

Step 15: Here is the most important steps since the PwnageTool makes your iPhone into a repair, 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 16: 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. The Pwnage Tool has created an image software on your iPhone containing the release and to be able to finish your iTunes to restore this file “unlocked.”

Step 17: Once you are successfully entered into DFG mode. Close PwnageTool application and start iTunes.

Step 18: Once you start iTunes you will get messge asking you to restore. Click “Ok”. You will get to this screen in iTunes.

Step 19: Hold “Alt/Option” key on you mac and click “Restore”.

Step 20: Navigate to the Custom IPSW file that you just build and click open to restore this .ipsw file into you iPhone. This process may take about 10 to 15 minutes.

Once this process is done you need to Soft Unlock you iPhone 3G using Ultrasn0w.
Here is the link: How to Unlock iPhone 3G with OS 3.1

Vuala!!!!!!!!!!!! (Here it is in French)..

Happy Hacking guys..

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Mac Hack PC

Depending on your BaseBand you can use UltraSn0w or Blacksn0w. If your BB is 05.11.07 use blacksn0w and if you any thing less than that use Ultrasn0w. Both can be downloaded from Cydia. For blacksn0w add this source in cydia www.blackra1n.com
Here is the tutorial - http://www.machackpc.com/iphone/3g/jailbreak-un... And http://www.machackpc.com/iphone/3g/how-to-unloc...
Smut

I had installed 3.1.2 custom firmware and it was already jailbreaked but how do I unlock it now? I have 3G iPhone
USMC7372

Don’t forget, with the second options at the least, both APN’s for Cellular Data and MMS have to be the same, or the phone will kick the MMS settings and your MMS won’t send/receive.

Thanks again MacHack! UDABOMB!!
Mac Hack PC

Just checked - The file size is 239.36 MB. You might have, had an error while downloading. So, please try it again. http://www.machackpc.com/iphone/download-iphone...
kiwinz

i download your custom fimware 2g yesterday Cydia& ICY have 166 mb why?.thanhs
Mac Hack PC

Bozo, Here is the link – http://www.machackpc.com/iphone/download-iphone...
iPhone 3G OS 3.1.2, BB – 04.26.08, Cydia and ICY

Update - Below tweak seems to be not working. Its does all the uninstalling part but, when your phones goes to sleep and wakeup, ICY will be back on the SCREEN. Please bear with me. As, I will be unpdating the custom firmware 2G & 3G with out ICY

Not sure if you knew this tweak but,.. – You could restore with this CF and install CyDelete. Once the installation is done, you will need to restart the springboard. Once that is done, just hold down any icon on the screen. Once it start shacking you will see an “X” mark on all Cydia Installed application. Then you could just delete ICY.
Bozo Baboon

Could you please upload a iPhone 3G OS 3.1.2 Custom Firmware with no baseband upgrade (retains 4.26.08) and with Cydia only and NO ICY?
Thanks!