All credits here...
http://www.addictivetips.com/mobile/jailbreak-iphone-3gs-ios-4/
As per I take no responsibility if you turn your iPhone into a paper weight ;)
- You will firstly need to downland the Jailbreak Bundle for iPhone 3GS plus pwnagetool 3.1.5 for Mac.
- You will also need RedSn0w beta 0.9.5 Beta 4 and iTunes 9.2 beta.
- Now once you are finished downloading all these tools, make sure to keep them in a directory together for easy access.
- Now go to contents and navigate through resources to Firmware Bundles.
- Once you are at the Firmware bundles, now copy the custome iPhone 2.1_4.0_8A293_bundle.bundle to the Firmware Bundles of the pwnagetool.app.
- Now go to the redsn0w app and click show package contents. Now navigate to the contents > Mac OS.
- After you are MacOS root directory, copy the cydia.tar.gz on your desktop and extract the file.
- After this you have to copy Cydia into the pwnage tool app. Just right click on the pwnagetool.app and browse to Contents> Resources> CustomPackages. Now click cydiainstaller.bundle and over-write all files with the ones you got for Redsn0w 0.9.5 Beta 4.
- Now you need to load the pwnagetool.app and have to create the iOS 4.0 custom Firmware for iPhone 3GS
- Once you get the custom .ipsw, restore your iPhone to iOS4.0 using iTunes.
2 comments:
it doesn't works... you can make all the mods to pwnagetool.app, even you can make the custom firmware... but anytime you try to update the firmware (with the iPhone in DFU mode) always get error 1600
If your getting the error 1600, you need to use 'recovery mode' instead of 'DFU mode'. Hope this helps.
Info here and many other Google results... http://www.simonblog.com/2008/10/07/iphone-jailbreakupgrade-more-on-itunes-1600-error/
Let me know how it goes.
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