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These are instructions on how to jailbreak and unlock your iPhone 3GS on iOS 4.1 using PwnageTool 4.1.3 for Mac OS X. This tutorial will explain how to upgrade your baseband if needed for an unlock.

For iPhone 3G use this tutorial.

There is no unthethered jailbreak for new iPhone 3GS bootroms and iOS 4.2.1 yet, so you should stay at iOS 4.1.

Important: iPhone3GS users with old bootroms who want to go to 4.2.1 and unlock should not use this PwnageTool! Update to stock 4.2.1 first, then use new redsn0w to update your baseband.

Step One
Make a folder called “Pwnage” on the desktop. Download a couple of things:

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These are instructions on how to jailbreak and unlock your iPhone 3G on iOS 4.2.1 using PwnageTool 4.1.3 for Mac OS X. This tutorial will explain how to upgrade your baseband if needed for an unlock.

Step One
Make a folder called “Pwnage” on the desktop. Download a couple of things:

• PwnageTool 4.1.3 from here

You will also need the 4.2.1 iPhone firmware.

• iPhone 3G iOS 4.2.1: iPhone1,2_4.2.1_8C148_Restore.ipsw

If you are on the 05.14 or 05.15 baseband you will also need the iPad 3.2.2 firmware. You can find out your baseband version in Settings -> General -> About -> Modem Firmware.

• iPad iOS 3.2.2: iPad1,1_3.2.2_7B500_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.

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Good news is that you can still use redsn0w 0.8 to jailbreak firmware 3.0.1. Here’s the step-by-step plan:

1. Download both firmware 3.0 and firmware 3.0.1 (link).
2. Download redsn0w 0.8 (link).
3. Update or restore to official 3.0.1 in iTunes.
4. Run redsn0w.
5. When redsn0w asks you to identify the IPSW used, point it at the 3.0 IPSW instead of the 3.0.1 one.
6. Follow the instructions.
7. After the jailbreak, reinstall ultrasn0w 0.9 if you need the unlock.

The Dev-Team, after a little advice last night, has released an updated for ultrasn0w, the tool that provides unlock  for the iPhone 3G and 3GS.

Through a message on Twitter we found out that this new version fixes a slight bug that appeared when we turn off Airplane mode. So if you have problems – go ahead and update. The update is also recommended for everybody else.

Avaliable in Cydia, repository http://repo666.ultrasn0w.com.

via ispazio

DevTeam updated ultrasn0w. They removed the daemon and used ideas of GeoHot’s purplesn0w, but implemented these ideas in a better safer way. New ultrasn0w 0.9 uses 152 bytes of baseband RAM, which is 6900 timesless than purplesn0w. They also use mobile substrate to patch CommCenter, instead of patching the file itself.

Here is a list of features from DevTeam.

• Works on both 3G and 3GS.
• Works on hacktivated devices.
• Works regardless of how you jailbroke your device.
• Doesn’t patch any mach-o binary whatsoever.  (Doesn’t require a separate patch as each new firmware comes out).
• Doesn’t install any additional daemon
• Has no race conditions, no popups about “Missing SIM”, no network issues
• Is almost 7000 times smaller than its nearest competition
• Is available now via Cydia.  Source repo is http://repo666.ultrasn0w.com (that last “0” in ultrasn0w is a zero!)

Anyway this new solution is a very good one. It uses good ideas in a good way. We recommend to use ultrasnow.