The Chronic Dev Team has released Greenpois0n RC6.1, a new version of their ‘untethered’ iOS 4.2.1 jailbreak tool which now includes an update that disables Apple’s means of protecting the iBooks application from jailbreakers.
Recent Greenpois0n changelog:
RC6.1: comex ‘hunnypot’ iBooks fix, don’t overwrite animate if it already exist
RC6: Apple TV 2 support, fixed emulators compatibility issues with greenpois0n
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:
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.
Developer Steve Troughton-Smith has tweeted that customers of Three in Ireland and the UK and China Unicom in China woke up today and found that that Cydia on their devices was blocked by the carrier. So, now the jailbroken devices don’t have access to certain content from Cydia when on the Three and China Unicom networks. Though, only main page is unavailable. Moreover, Cydia is blocked over 3G networks that means that the popular store still available via Wi-Fi.
These are step-by-step instructions on how to jailbreak iOS 4.2.1 on iPhone 3GS, iPhone 4, iPad, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G using Greenpois0n for Windows. Tutorial for Mac OS X users is available here. All the steps are the same for all devices, we will cover iPhone.
Greenpois0n has been updated to support the iOS 4.1 and iOS 4.2.1 firmware. Use Limera1n if you want to jailbreak iOS 4.0, iOS 4.0.1, iOS 4.0.2.
Remember: Greenpois0n recommends a clean restore before continuing.
Unlockers: do not update to iOS 4.1 or iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. Experienced users can also try update to iOS 4.2.1 without upgrading your baseband by using TinyUmbrella. Start TSS Server->Start iTunes->Plug in your iPhone->Restore 4.2.1->Error 1013->Put phone into DFU Mode->Launch Greenpois0n.
We are not authors of this app. We do not promise that everything will go well, use this tutorial at your own risk.
These are step-by-step instructions on how to jailbreak iOS 4.2.1 on iPhone 3GS, iPhone 4, iPad, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G using Greenpois0n for Mac OS X. Tutorial for Windows users is available here. All the steps are the same for all devices.
Greenpois0n has been updated to support the iOS 4.1 and iOS 4.2.1 firmware. Use Limera1n if you want to jailbreak iOS 4.0, iOS 4.0.1, iOS 4.0.2.
Remember: Greenpois0n recommends a clean restore before continuing.
Unlockers: do not update to iOS 4.1 or iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. You can unlock iPhone 4 with iOS 4.1 using ultrasn0w. Experienced users can also try update to iOS 4.2.1 without upgrading your baseband by using TinyUmbrella. Start TSS Server->Start iTunes->Plug in your iPhone->Restore 4.2.1->Error 1013->Put phone into DFU Mode->Launch Greenpois0n.
We are not authors of this app. We do not promise that everything will go well, use this tutorial at your own risk.
These are step-by-step instructions on how to jailbreak iOS 4.2.1 on iPhone 3GS, iPhone 4, iPad, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G using Greenpois0n for Mac OS X. Tutorial for Windows users is available here. All the steps are the same for all devices, we will cover iPhone.
Greenpois0n has been updated to support the iOS 4.1 and iOS 4.2.1 firmware. Use Limera1n if you want to jailbreak iOS 4.0, iOS 4.0.1, iOS 4.0.2.
Remember: Greenpois0n recommends a clean restore before continuing.
Unlockers: do not update to iOS 4.1 or iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. Experienced users can also try update to iOS 4.2.1 without upgrading your baseband by using TinyUmbrella. Start TSS Server->Start iTunes->Plug in your iPhone->Restore 4.2.1->Error 1013->Put phone into DFU Mode->Launch Greenpois0n.
We are not authors of this app. We do not promise that everything will go well, use this tutorial at your own risk.
Step One
Open your web browser and download the latest Mac version of GreenPois0n from here.
Step Two
When prompted save the download to your desktop.
Step Three
Double click the downloaded greenpois0n-osx_rc5.zip file to extract the archive. Then double click greenpois0n icon from the desktop to launch the application.
Step Four
Connect your iPhone to the computer, power it off. Then click the large Jailbreak button in greenpois0n app.
Step Five
You will now be instructed on how to place your iPhone into DFU mode. You will be asked to press and hold the sleep button (power button) for 3 seconds.
Now continue holding sleep button and and press home for 10 seconds.
Release sleep button and continue holding the home button. Do not release the Home button at this point!.
Step Six
Once your iPhone is successfully in DFU mode the jailbreak will begin. You need to continue holding the home button.
Step Seven
Now once Greenpois0n informs you that it has completed the jailbreak you can release the Home button.
Click the Complete button to close the application.
You’ll notice some text scrolling on your device.
Step Eight
After the iPhone restarts you’ll see a new Loader application on your Springboard. Press to launch it.
Step Nine
Select Cydia then press the large Install Cydia button that appears. Now Cydia will be downloaded from internet, so you need internet connection through wi-fi or edge/3g.
Step Ten
Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove Loader.app button.
Step Eleven
Restart your iPhone and run Cydia. Let it do all the necessary updates.
You’re done!
Update:To change the boot logo back to Apple: install “Apple Boot Logo” from Cydia, then go to Settings-BootLogo and select Apple Logo.
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 4, 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.