How to Jailbreak Your iPhone 3GS Using PwnageTool (Mac) [4.2.1]

Posted February 16, 2011 at 3:13am by iClarified | Please help us and submit a translation by clicking here | 117006 views
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These are instructions on how to jailbreak your iPhone 3GS on iOS 4.2.1 using PwnageTool for Mac.

Step One
Make a folder called "Pwnage" on the desktop. In it, you will need a couple of things. PwnageTool 4.2, found here or here.

You will also need the 4.2.1 iPhone firmware.
4.2.1 (3GS): iPhone2,1_4.2.1_8C148a_Restore.ipsw

When downloading the IPSW file, it is best to download it with Firefox since Safari often auto extracts it!

Step Two
Double click to mount PwnageTool then drag the PwnageTool icon into the Pwnage folder.

Then from the Pwnage folder double click to launch the PwnageTool application.

Click Ok if presented with a warning.

Step Three
Click to select Expert Mode from the top menu bar

Step Four
Click to select your device. A check-mark will appear over the image of the device. Click the blue arrow button to continue.

Step Five
You will be brought to the "Browse for IPSW" page. Click the Browse for IPSW... button.

From the popup window select your firmware from the Pwnage folder then click the Open button.

Step Six
You will then be brought to a menu with several choices. Click to select General then click the blue arrow button.

The General settings allows you to decide the partition size. Check Activate the phone if you are not with an official carrier then click the blue arrow button.

NOTE*: Deselect Activate if you have an iPhone legitimately activated on an official carrier.

The Cydia settings menu allows you to create custom packages so you do not have to manually install the necessary them later.

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 Seven
You are now ready to begin the pwnage process! Click the Build button to select it then click the Blue arrow button to begin.

Step Eight
You will be asked to save your custom .ipsw file. Save it to your Pwnage folder you created on your Desktop.

Your IPSW is now being built. Please allow up to 10 minutes.

You will be asked to enter your administrator password. Do this then click the OK button.

Step Nine
Once your ipsw has been built you will be asked to connect your iPhone to the computer. Once it detects your device PwnageTool will guide your through the steps to putting your iPhone into DFU mode.

Press and hold the power and home buttons for 10 seconds.

Then release the power button and continue holding the home button for 10 seconds.

Once your iPhone is successfully in DFU mode, PwnageTool will prompt you to launch iTunes.

Step Ten
Once In iTunes, hold the Alt/Option key and click Restore.

Step Eleven
Navigate to the Pwnage folder on your desktop using the dialog window that appears. Select the custom IPSW that was created and click the Choose button.

Step Twelve
iTunes will now restore the firmware on your iPhone. This can also take up to 10 minutes. Once done you will be rebooted into jailbroken iOS 4.2.1!

***THANKS: Thank you to Geohot and the Dev-Teams for their hard work in making this jailbreak and tutorial possible!

Add Comment
Rands - July 20, 2011 at 5:23pm
Please help! I was following this tutorial and got to the last step, as I was restoring it in itunes I kept getting the following message: "The iPhone cannot be restored at this moment because the iPhone software update server could not be contacted or is temporarily unavailable" Now I'm stuck in DFU mode, what should I do?? :(
Tony - July 20, 2011 at 5:33pm
Hold the home and power buttons till you see the apple icon.
Rands - July 20, 2011 at 7:02pm
Okay, I just rebooted it using blackra1n and it's working again. It's still tethered and running on the old iOS, but at least I got my phone back and didn't lose any of the info. Guess I'll just stick to 3.1.2.
Pat_O - April 4, 2011 at 3:35pm
Hi All, Great work Dev Team. Now my question was, I created a custom restore(using PwnageTool) for my iPhone3G 4.2.1 and managed to jailbreak it. The problem that I now have is, both wi-fi and bluetooth are not functioning. For example, wi-fi has address but doesn\'t pick up any signals. I have tried to re-jailbreak but still get the same problem. what solution can you recommend?
dragonmorphs - March 12, 2011 at 9:14pm
So I just went through all the steps and when I went to restore the Custom_Restore, I got a message from iTunes \"The iPhone \"iPhone could not be restored. This decise isn\'t eligible for the requested build.\" What to do? My iphone is 4.2.1, BB 5.15.04, bought unlocked. My macbook I used is up to date and so is my iTunes... could that be the reason?
david - March 18, 2011 at 12:13pm
i get the same error message with my factory unlocked 3gs!
dragonmorphs - March 18, 2011 at 10:38pm
Yeaaa. I think it\'s \'cause we don\'t have SHSH (well i didn\'t save any with TU) and Apple isn\'t allowing anymore 4.2.1.... i think
david - March 19, 2011 at 8:00am
i checked out greenpoison, and it worked, and apart from that its much easier :-)
Miguel - April 2, 2011 at 5:31pm
I just ran into the same error trying to upgrade from 4.0 to 4.2.1. How did you guys resolve it? Thanks!
iHacker - March 4, 2011 at 4:49pm
To all queries regarding BB 06.15.00 : worked Wonderfully!! Successfully \"Un-tethered\" my previously jailbroken tethered device! NO issues/bugs whatsoever! iPhone 3G [S] with NEWER bootrom previously jailbroken but TETHERED on iPad baseband 06.15.00 on iOS 4.2.1. Here\'s what you do: 1.0 Just follow the above given procedure (Step by Step). 2.0 If error 16xx is encountered in iTunes during restore, don\'t worry, DO NOT TOUCH the iPhone (leave it on DFU mode plugged in) and RESTART the computer. 3.0 Open iTunes (if not automatically) and repeat the \"Option-Restore\" process. This should do the trick and voila!!, you just got yourself an UNTETHERED Jailbreak!
jo-b - March 14, 2011 at 9:10am
Hi, the Mac-Restart doesn\'t solve the problem here. iTunes always gives the message: \"The iPhone cannot be restored, because the iPod-Updateserver[!!] isn\'t available yet.\" or \"Restoring is not possible\" (>> both free translated from german.) Restoring from the old (4.1) ipsw is also not possible. Are there any other ideas out there? tia jo-b -- iPhone 3GS, MBP 10.6.6, iTunes 10.2.1
claudia - March 3, 2011 at 7:13pm
I made it, thank you sooo much! It worked the second time y tried.
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