Redsn0w 0.9.6b2, which was released by iPhone Dev-Team yesterday to jailbreak iOS 4.1 on all iDevices, is fully capable of jailbreaking iOS 4.2 GM on iPhone 4/3GS/3G, iPod Touch 4G/3G/2G & iPad. Redsn0w 0.9.6b2 is based on the same bootrom exploit which was used by Geohot in his Limera1n tool.
Update via MuscleNerd:
Though Redsn0w 0.9.6b2 will jailbreak iOS 4.2 GM on all of the said devices but it'll also upgrade your baseband to 05.15.04 on iPhone 3GS/3G and 07.10.00 on iPhone 4. Both of these basebands are NOT unlockable using the the current version of Ultrasn0w. So all those iPhone users who reply on unlocked devices should stay away from it.
Official update via Dev-Team Blog:
- iPhone 4
- iPhone 3GS
- iPhone 3G
- iPod Touch 4G
- iPod Touch 3G
- iPod Touch 2G (Non-MC models)
How to Jailbreak iOS 4.2 GM on iPhone 4/3GS/3G, iPod Touch 4G/3G/2G & iPad with Redsn0w 0.9.6b2:
*Find download links at the end of post
- *Download iTunes 10.0.1 for Windows | Mac OS X.
- *Download Redsn0w 0.9.6b2 for Windows | Mac OS X.
- *Download both iOS 4.1 and iOS 4.2 firmware compatible with your iDevice.
- Restore iOS 4.2 IPSW using iTunes 10.0.1 to your iDevice.
- Once iOS 4.2 is successfully restored on your iDevice, launch Redsn0w.exe, click on the "Browse" button and select iOS 4.1 IPSW (NOT iOS 4.2 IPSW).
- Check "Cydia" and click on the next button.
- Check Enable Multitasking, Homescreen Wallpaper and Battery Percentage. Please note that this step is optional, if you don't want to use these options, simply uncheck them.
- Turn off and unplug your device from your computer.
- Connect your device in recovery mode. For that you will need to quickly hold "Power" button, after holding the "Power" button for 3 seconds, you will now have to hold "Home" button for 10 seconds. After that release "Power" button but keep holding "Home" until the installation automatically begins.
- Now leave the rest for Redsn0w, your device will reboot automatically once the process is completed. You should have a fully jailbreaked iPhone/iPod Touch on iOS 4.1
Download iOS 4.1 for iPhone 4/3GS/3G and iPod Touch 4G/3G/2G
Download iOS 4.2 GM for iPhone 4/3GS/3G & iPod Touch 4G/3G/2G
Download iOS 3.2.2 for iPad (Wifi+3G)
Download iTunes 10.0.1 for Windows & Mac
Download Redsn0w 0.9.6b2 for Windows and Mac OS X