[Guide] How to Jailbreak and Unlock iPhone 3G and iPhone 3GS on iOS 4.2.1

Following the Jailbreak for iOS 4.2 the Dev Team has released an update to UltraSn0w allowing users who rely on a carrier unlock to use their devices with devices with iOS 4.2.1.

The Apple iPhone 3G and the Apple iPhone 3GS on basebands later than 05.13.04 can take advantage of this unlock.

If you are using an Apple iPhone 4 you will have to wait longer for an unlock as the baseband OS on the newer device requires more work from from the Dev-Team. Stay tuned for an update.

Download Greenpois0n RC5 for iOS 4.2.1

The GreenPois0n RC5 Jailbreak tool has been released. This version of the tool allows users to jailbreak their devices running iOS 4.2.1 (untethered).

[Guide] How to jailbreak iOS 4.2.1 using Redsn0w 0.9.6b4

We previously shared a guide on how to jailbreak iOS 4.2 using PwnAgeTool 4.1 for Mac. Now the Dev Team has updated their RedSn0w jailbreak tool to version 0.9.6b4 with support for jailbreaking iOS 4.2.1.

Redsn0w 0.9.6b4 is based on Geohot’s Limera1n bootrom exploit which has already pwned all current iOS devices. The only issue is that this is a tethered jailbreak which means you will have to boot it into a “jailbroken state” on every reboot.

So if you have an iOS device running iOS 4.2.1 check out our following guide on how to jailbreak the device using Redsn0w 0.9.6b4

Apple iOS 4.2.1 released for iPhone, iPad and iPod Touch

Apple has just released the final version of iOS 4.2.1 for iPhone 4, iPhone 3GS, iPhone 3G, iPad and iPod touches. The update to iOS brings a number of new features for iPhone, iPad and iPod touch users including: Multitasking, Folders and Game Center for iPad, AirPrint, AirPlay, and other system wide changes and improvements.