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Jailbreak iOS 4.2.1

How to Update iPhone 3GS / 3G Baseband to 06.15.00 with Redsn0w 0.9.6b5 for iOS 4.2.1 Unlock

Taimur Asad·November 29, 2010
Redsn0w 0.9.6b5 has just been released which can jailbreak and update iPhone 3GS & 3G baseband to 06.15.00 so that it can be unlocked using the newly released Ultrasn0w 1.2.

Update iPhone 3GS / 3G Baseband to 06.15.00 with PwnageTool 4.1.3 for iOS 4.2.1 Unlock [Guide]

Taimur Asad·November 29, 2010
A special edition of PwnageTool (version 4.1.3) has been released which can update the baseband of iPhone 3GS & 3G to 06.15.00 so that they can be unlocked using Ultrasn0w 1.2 on the latest iOS 4.2.1 or iOS 4.1 firmware. This is important because basebands 05.14.xx and 05.15.xx are currently not unlockable using Ultrasn0w.

Video Guide on How to Jailbreak iOS 4.2.1 on iPhone, iPad, iPod touch Using Redsn0w

Steven Chi·November 24, 2010

iOS 4.2.1 Final Version Jailbroken Using Updated Redsn0w 0.9.6b4 [How to Guide]

Taimur Asad·November 23, 2010
The iPhone Dev Team has just released Redsn0w 0.9.6b4 today which brings first proper jailbreak, with working Cydia and MobileSubstrate for all iOS 4.2.1 devices.

GreenPois0n iOS 4.2.1 Tethered Jailbreak to Release Within a Few Days

Taimur Asad·November 23, 2010
The well known iPhone developer and hacker Joshua Hill of the Chronic Dev Team has provided an ETA for the arrival of updated GreenPois0n jailbreak tool for the newly released iOS 4.2.1 firmware. For those of you who don’t know, GreenPois0n is based on Geohot’s Limera1n bootrom exploit which has already pwned all current iOS devices for life. The only problem is that it is a tethered jailbreak, which means you will have to boot it into a “jailbroken state” using a tool like Redsn0w on every reboot.

How to Patch & Install Cydia on iOS 4.2.1 After Redsn0w Jailbreak [Guide]

Taimur Asad·November 22, 2010

How to Install Jailbreak Apps on iOS 4.2.1 without Cydia Using Redsn0w

Taimur Asad·November 21, 2010
Since Cydia is broken on iOS 4.2.x, the new Redsn0w 0.9.6b3 released today supports iOS 4.2.1 so that developers can make their jailbreak-apps compatible before Apple releases the final firmware to public. Using this version of Redsn0w, you can now install jailbreak-apps without using Cydia.

Redsn0w 0.9.6b3 for iOS 4.2.1 Jailbreak Now Available for Download

Taimur Asad·November 21, 2010
The iPhone Dev Team has just released Redsn0w 0.9.6b3 which brings support for iOS 4.2.1 GM firmware file. The highlight feature of this release is SSH and SSL support which will now allow you to install bundles and packages independent of Cydia, which is currently broken on 4.2.1.

How to Jailbreak iPod touch 4G on iOS 4.2.1 GM with PwnageTool Bundle

Taimur Asad·November 21, 2010

iOS 4.2.1 GM on iPad and iPod touch 4G Jailbroken Using PwnageTool with Working Cydia ! [Guide]

Taimur Asad·November 20, 2010
I have just jailbroken my iPad on iOS 4.2.1 using PwnageTool bundles released by Johnny Franks. These bundles can be used to jailbreak the newly released iOS 4.2.1 GM on both iPad and iPod touch 4 with working Cydia !

How to Downgrade iOS 4.2.1 to 4.1 / 4.0.2 / 4.0.1 on iPhone 4, 3GS, 3G, iPod touch and iPad

Taimur Asad·November 19, 2010
iOS 4.2.1 was released yesterday for iPhone 4, 3GS, 3G, iPod touch 4G, 3G, 2G and iPad. Even though iOS 4.2.1 jailbreak is possible via Redsn0w 0.9.6b2, but Cydia is still broken which makes the jailbreak pointless for many. It also contains new baseband for all iOS devices which currently makes it impossible to unlock using existing version of Ultrasn0w. So if you upgraded to iOS 4.2.1 and now want to downgrade back to iOS 4.1 / 4.0.2 / 4.0.1, follow the instructions posted below to downgrade iOS 4.2 on iPhone 4, 3GS, 3G, iPod touch and iPad to iOS 4.1 / 4.0.x.

How to Jailbreak iOS 4.2.1 GM on iPhone 4, 3GS, 3G and iPod touch with Redsn0w [Guide]

Taimur Asad·November 19, 2010

iPhone, iPod touch and iPad Jailbreakers, Stay Away from iOS 4.2.1 Until Further Notice

Uzair Ghani·November 19, 2010
Alright guys, here is a quick heads up! Apple has seeded iOS 4.2.1 GM to developers hinting towards the fact that final version will see the light of day soon. If you’re one of those who are currently relying on a jailbreak or a carrier unlock then we highly recommend that you avoid updating to iOS 4.2.1.

iOS 4.2.1 GM Released for iPhone, iPad, iPod touch

Taimur Asad·November 19, 2010
After releasing a revised version of iOS 4.2 GM for iPad to developers last week, Apple has now seeded iOS 4.2.1 GM for iPhones, iPad and iPod touches. This build is meant for developers only. Only members enrolled in the iPhone Developer Standard or Enterprise Program can access these bits of by signing into Apple Developer Connection.
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