UPDATE: See Jailbreak iOS 4.2.1 for instructions on how to jailbreak iOS 4.2.1.
The final iOS 4.2 download is expected to be released soon. Jailbreakers will be forced to jailbreak their iDevice again. If you plan to jailbreak iOS 4.2, read this post for the full details. Remember, don’t hit the update button once the iOS 4.2 software update comes out!
Jailbreak iOS 4.2 Details
All iOS devices will be jailbreakable on iOS 4.2 and future firmware updates. This means you can jailbreak iPhone 4 4.2, jailbreak iPhone 3GS 4.2, jailbreak iPhone 3G 4.2, jailbreak iPhone 2G 4.2, jailbreak iPhone 4.2, jailbreak iPod touch 4G 4.2, jailbreak iPod touch 3G 4.2, jailbreak iPod touch 2G 4.2, jailbreak iPod touch 4.2, jailbreak iPad 3G 4.2, and jailbreak iPad 4.2 firmware.
Tethered Jailbreak vs Untethered Jailbreak
Some devices may be tethered. This means that you will need to jailbreak iOS 4.2 each time you reboot your iOS device. Untethered jailbreak means you only need to jailbreak once and you can reboot without having to jailbreak iOS 4.2 every time. The good news is that most of the devices will be untethered.
Jailbreak iOS 4.2 Software
You will be able to jailbreak iOS 4.2 with either redsn0w (Windows,Mac, Linux), greenpois0n (Windows,Mac, Linux), or limera1n (Windows, Mac). There is no estimate as to when a jailbreak will be out, but it should be out very quickly. If you haven’t already, Subscribe to our YouTube Channel and Join our Facebook page.
Unlock iOS 4.2 Details
iPhone 3G and 3GS users will be able to unlock iOS 4.2 through a newer version of ultrasn0w, while iPhone 4 users will have to wait.
iOS 4.2 Update Details
Notable new features in iOS 4.2 for iPad include Multi-tasking, Folders, AirPrint, and Game Center. New features in iOS 4.2 for iPhone and iPod touch include AirPlay, Ringer Volume Control, FaceTime, and improved performance on iPhone 3G.