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The Chronic Dev-Team has recently announced via twitter that they will release their Greenpois0n untethered jailbreak for Windows this weekend.

Site issues should be better soon thanks to @iOPK. Windows version should be out tomorrow or the next day

greenpois0n windows Greenpois0n for Windows will Be released this weekend

Greenpois0n for Mac OS X with support of iOS 4.2.1 untethered jailbreak was released yesterday.

gp web1 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 s1 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 s2 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

Step Four
Connect your iPhone to the computer, power it off. Then click the large Jailbreak button in greenpois0n app.

greenpois0n rc5 s3 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 s4 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

Now continue holding sleep button and and press home for 10 seconds.

greenpois0n rc5 s5 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

Release sleep button and continue holding the home button. Do not release the Home button at this point!.

greenpois0n rc5 s6 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

Step Six
Once your iPhone is successfully in DFU mode the jailbreak will begin. You need to continue holding the home button.

greenpois0n rc5 s7 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 s8 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 s9 266x400 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 s10 266x400 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS greenpois0n rc5 s11 266x400 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

Step Ten
Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove Loader.app button.

greenpois0n rc5 s12 266x400 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS greenpois0n rc5 s13 266x400 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

Step Eleven
Restart your iPhone and run Cydia. Let it do all the necessary updates.

greenpois0n rc5 s14 266x400 Step by step tutorial: untethered jailbreak iOS 4.2.1 on iPhone, iPod or iPad using Greenpois0n for Mac OS

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.

greenpois0n rc5 486x400 GreenPois0n RC5 released: untethered jailbreak for iOS 4.2.1

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.

You can download GreenPois0n RC5 from here.

UPDATE: Step-by-step tutorial

Good news everyone. DevTeam recently posted a tweet where they inform us that they will soon release a new version of Redsn0w utility for Windows. It will be an untethered jailbreak for iOS 4.2.1 using the Monte iOS 4.1 technique.

redsn0w 097 jb Dev Team is ready to release RedSn0w 0.9.7 with untethered iOS 4.2.1 jailbreak

In fact, Apple still provides 4.1 ipsw and this could be used to jailbreak.

In addition, the team warns that Windows version will be very slow because the program uses the filesystem instead of RAM.

redsn0w 097 jb 2 Dev Team is ready to release RedSn0w 0.9.7 with untethered iOS 4.2.1 jailbreak

iOS 4.2 Jailbreak

The Chronic Dev-Team has announced via twitter an untethered jailbreak for iOS 4.2.1. This should work for iPhone 3GS (new bootrom), iPhone 4 and iPad. And it will not require saved iOS 4.2b3 SHSH keys.

The untether is demoed in the video below. It’s a result of a collaboration between @0naj, @p0sixninja, and @pod2g. P0sixninja has previously said it will not require iOS 4.2b3 SHSH blobs.

A small bug with wifi still remains. They will release utility as soon as they fix it.

Here is a video proof:

geohot1 Geohot To Release Untethered iOS 4.2.1 Jailbreak

Last week we reported that the well-known hacker Geohot might call his next jailbreak tool rubyra1n. Now guts from Dev Team hit that they know something about Geohot’s effort to bring a proper untethered jailbreak to iOS 4.2.1.

A recent tweet from MuscleNerd confirms the rumors: “I hear geohot does have an untether actually! Though not for all devices”.

MuscleNerd from iPhone DevTeam tweeted that an untethered jailbreak solution for iOS 4.2.1 will be released soon, probably next week.

scotty6kids78: @MuscleNerd are we any closer to the unteathered #jailbreak for the new #ios4.2 on #iphone4 ?

MuscleNerd: @scotty6kids78 it’ll be here by Xmas (not because we’re sitting waiting for Xmas, but because it’s achievable deadline)

This untethered solution will be applicable to all current iOS 4.2.1 devices, including iPhone 4, iPhone 3GS, iPad, Apple TV 2G and iPod touch 4G. We will keep you updated.

MuscleNerd Untethered iOS 4.2.1 Jailbreak for iPhone 4 next week

untethered DevTeam Successfully Untethers iPhone iOS 4.2.1 Jailbreak

Currently iOS 4.2.1 jailbreak for iPhone 4, iPhone 3GS new bootrom, iPad, iPod 3G/4G is a tethered jailbreak. That means if you have to reboot your device, it will show a “connect to itunes” logo until you run the jailbreak software again. Musclenerd from iPhone DevTeam has announced that untethered jailbreak for iPhone iOS 4.2.1 is ready. Unfortunately this will be only for those who saved 4.2b3 SHSH keys via Cydia or tinyumbrella.

Got “backup plan” for untethered 4.2.1 JB working (video coming up). Uses mysterious 4.2b3 hashes Cydia kept for you.

“Backup plan” because hacker comex is working on a more extensible jailbreak. We’ll keep you up to date with more information as it develops. For now you can watch the proof video:

Redsn0w 096B4 RedSn0w 0.9.6b4: jailbreak for iOS 4.2.1 released

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), iPhone 4, 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 TinyUmbrella 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.

iOS 4.2 Jailbreak

Next iPhone/iPod/iPad firmare iOS 4.2 is due out soon. What can we expect in terms of jailbreaking 4.2?

Limera1n exploit for 4.2 in most cases is a tethered jailbreak. That means if you have to reboot your device, it will show a “connect to itunes” logo until you run the jailbreak software again.

  • iPhone 3G – will run 4.2 untethered. Redsn0w will be updated.
  • iPhone 3GS – old bootrom will run 4.2 untethered if done via Pwnagetool while updating from 4.1. Otherwise it will be tethered.
  • iPhone 4 – tethered
  • iPod 2G – untethered.
  • iPod Touch 3G, iPod Touch 4G – tethered
  • iPad – tethered.

Tethered jailbreak isn’t that bad for iPads and iPods. But if something happens and your iphone reboots while you’re away from your computer, you cant use the device until you get home and run some tool on your computer again.

We suggest not updating until new expoit will be implemented in new utility.

The community is working on a solution to this to either make the jailbreak untethered or at least semi-tethered. Semi-tethered means the device will at least reboot, but unjailbroken while on the road until you return to your computer.