iPhone Dev Team has released an unofficial PwnageTool bundle for iPhone 3GS owners with the old bootrom that want to update to iOS 4.2.1 without upgrading their baseband. So if your iPhone 3GS baseband is 05.13.04 or lower (Settings -> General -> About -> Modem Firmware) then you should install the bundle before using PwnageTool 4.1.3 to update to iOS 4.2.1.

This is great new for iPhone 3GS (old bootrom) owners, you can update your iPhone 3GS to iOS 4.2.1 and since the baseband is preserved, you can unlock your iPhone 3GS using Ultrasn0w 1.2 without the need to update it’s baseband to 06.15.00, which has its risks.

iPhone Dev team has provided the following information on their blog about the unofficial PwnageTool bundle:

For those Mac users with an old-bootrom 3GS who really know what they’re doing,here’s a minimal 3GS 4.2.1 bundle that will get you to 4.2.1 without updating your baseband.  Be sure to uncheck “Activate the iPhone” using Expert mode.  To actually jailbreak after you’ve restored with the help of that bundle, please use redsn0w.

Download and Install PwnageTool Bundle for iPhone 3GS (old bootrom):

• Download the PwnageTool bundle from here and extract the contents (iPhone2,1_4.2.1_8C148a.bundle) of the zip file.
• If you have downloaded PwnageTool, right click on the extracted PwnageTool app and select Show Package Contents from the menu.
• Navigate to Contents/Resources/FirmwareBundles/.
• Copy and paste the iPhone2,1_4.2.1_8C148a.bundlethat your had extracted earlier into the FirmwareBundles folder.

That’s all, now when you launch the PwnageTool, it will pick up the latest firmware bundle.

As always, let us know how it goes in the comments section below. And, stay tuned for more news and info on this topic by following us on Twitter and/or subscribing to our RSS Feed.

[Source: iPhone Dev Team’s (blog)]

Authors: _GadgetNews

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