DevTeam released PwnageTool 4.2 utility. It is able to create a custom IPSW that can perform an untethered jailbreak on iOS 4.2.1. As usual it can preserve baseband version for unlockers. Devteam used the same method that was implemented in greenpois0n.
PwnageTool supports all 4.2.1 devices other than iPod touch 2G:
Jailbreak is even improved compared to GreenPois0n RC6:
DevTeam released PwnageTool 4.2 utility. It is able to create a custom IPSW that can perform an untethered jailbreak on iOS 4.2.1. As usual it can preserve baseband version for unlockers. Devteam used the same method that was implemented in greenpois0n.
PwnageTool supports all 4.2.1 devices other than iPod touch 2G:
Jailbreak is even improved compared to GreenPois0n RC6:
PwnageTool also includes two very recent improvements to the 4.2.1 JB: iBooks was just fixed by @comex and @pushfix last night so that it works as intended on DRMed books, and the wifi problem on AppleTV 2G was fixed by @nitotv, @DHowett, and @saurik. Both of these fixes will also be available in upcoming Cydia package updates, so if you’re already jailbroken you can wait for those updates rather than restore and jailbreak again.
You can download the new PwnageTool from here. We will post tutorial for PwnageTool 4.2 soon.
Update: step-by-step tutorial
Untethered iOS 4.2 jailbreak GreenPois0n has just been upgraded to version RC6. New version includes support for the Apple TV 2G. GreenPosi0n will give your Apple TV an untethered jailbreak and will also install the popular NitoTV software on it. RC6 also fixes emulator issues. So if you had problems with RC5 go ahead and try this one. You can also apply RC6 over RC5 without restoring.
You can download the latest GreenPois0n version here.
The Chronic Dev-Team has released Greenpois0n for Windows which brings an untethered jailbreak to iOS 4.2.1 devices. You can jailbreak , iPhone 3GS, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G, iPad.
You can download the latest version of GreenPois0n from .
Update:
The Chronic Dev-Team has released Greenpois0n for Windows which brings an untethered jailbreak to iOS 4.2.1 devices. You can jailbreak , iPhone 3GS, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G, iPad.
You can download the latest version of GreenPois0n from here.
Update: Step-By-Step tutorial
The Chronic Dev-Team has finally released the new version of Greenpois0n, which features a full untethered jailbreak for iOS 4.2.1. No SHSH blobs needed. The exploit used has already been patched in iOS 4.3, so it not work on future iOS 4.3.
You can jailbreak , iPhone 3GS, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G, iPad and Apple TV 2G. Unlike redsn0w 0.9.6 this is untethered, so there is no need to connect iOS device to a computer after restart.
There is only Mac OS X version available. Chronic Dev-Team will release Windows and probably Linux version soon.
Unlockers: do not update to stock iOS 4.2.1. You should keep your baseband version. Wait for new version of PwnageTool.
You can download GreenPois0n RC5 from here.
UPDATE:
DevTeam worked hard for the last several hours and released jailbreak tool for iOS 4.2.1. It is redsn0w 0.9.6 b4.
As usual we remind all ultrasn0w unlockers please stay away from this official firmware. Wait for the ability to create custom 4.2.1 IPSWs that don’t update your baseband!
New redsn0w 0.9.6 b4 uses limera1n exploit and will successfully jailbreak all devices. The only problem is that it is a tethered jailbreak, which means you will have to plug it to a computer and rerun redsn0w on every reboot. This so called tethered or semi-tethered jailbreak. This condition applies to iPhone 3GS (new bootrom), , iPad, iPod touch 2G (MC model), iPod touch 3G and iPod touch 4G. Hackers are working hard to create untethered jailbreak for these devices. To use future untethered jailbreak you need to save SHSH keys for iOS 4.1 using utility or directly in Cydia.
Old devices like iPhone 3GS (old bootrom), iPhone 3G and iPod touch 2G (non-MC model) can be jailbroken-untethered right now using this latest version of RedSn0w.
You can download RedSn0w 0.9.6 b4 here.
Just a day after PwnageTool 4.1.1 release, DevTeam created one more update for popular jailbreak utility – PwnageTool 4.1.2 for Mac OS X. This release should solve some problems that users had. However there are still users reporting iTunes errors when restoring custom firmware. Anyway PwnageTool 4.1.2 is worth trying.
You can download PwnageTool 4.1.2 here.
Here is a step-by-step Tutorial: how to jailbreak and unlock your iPhone using PwnageTool.
Today DevTeam released new version of jailbreak utility PwnageTool 4.1.1 for Mac OS X. This release solves some of the problems with the previous version 4.1. Many users had errors with restore process, some had Cydia crashes. If you had any problems with PwnageTool 4.1 – we recommend you try to use the new version PwnageTool 4.1.1.
You can download PwnageTool 4.1.1 here.
Here is a step-by-step Tutorial: how to jailbreak and unlock your iPhone using PwnageTool 4.1.1.
These are instructions on how to jailbreak your iPhone using PwnageTool 4.1 for Mac OS X. If you need unlock and you have not updated to iOS 4 you will be able to preserve baseband and unlock iPhone using ultrasn0w.
This guide will work for , iPhone 3GS, iPhone 3G, iPod Touch 3G, iPod Touch 4G, iPad and AppleTV. Just use the right firmware and select the right device (step four).
Step One
Make a folder called “Pwnage” on the desktop. Now you need to download there PwnageTool 4.1 from here and iOS 4.1 firmware from here.
When downloading the IPSW file, it is best to download it with Firefox since Safari often auto extracts it!
Step Two
Double click to mount PwnageTool then drag the PwnageTool icon into the Pwnage folder.