Jailbreak iPhone, iPod Touch, iPad

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.

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.

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.

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:

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”.

May be soon we will jailbreak our devices with a new tool from George Hotz (better known as Geohot) called Rubyra1n. On March 27, 2010 George Hotz registered two domains limera1n.com and blackra1n.com, another jailbreak tool Hotz released last year. The new rubyra1n, however, doesn’t share the same data with limera1n.com — an app released in October to jailbreak iOS 4.1. Geohot doesn’t comment these rumors anyhow, but we, obviously, wouldn’t be surprised at all to see him coming out with his own iOS 4.2.1 jailbreak for all devices.

The iPhone Dev team has just released the second beta of their untethered RedSn0w jailbreak (the first beta has been released few hours ago and has more bugs).

New jailbreak is called “Jailbreak Monte”, as it uses new “backup method”. The iPhone Dev Team warns that their beta-version is not a general release and you should back up all your media before using it. There are also other limitations and bugs:

• The beta is limited to iPod touch 4G, iPad and iPhone4;
• The team asks not to participate in testing if you rely on the ultrasn0w carrier unlock;
• The bluetooth functionality is disabled due to sandbox problem;
• iPod player works only on iPod touch 4G;

To use this version of jailbreak Cydia should have your 4.2b3 SHSH blobs saved on file and following:

“You must already have the usbmuxd software installed and running on your Mac (this requirement will eventually go away too). The correct invocation of the relay is just as that page says: “./tcprelay.py -t 22:2222”.  If the relay isn’t installed or running correctly by the time the redsn0w ramdisk has started, you’ll need to restore to stock FW again to try it again. Please test it beforehand to save yourself some time!”

Now, if you’re ready to apply this version of jailbreak, upi can download redsn0w 0.9.7 beta here.

After downloading and applying just select “Jailbreak Monte” to try out the untether.

The iPhone Dev team asks to test it after a fresh restore in order to keep track of the variables involved. Be careful!

By the way, iPodUplink has posted a video where you can see how to jailbreak your device with the latest version of redsn0w:

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.

This week Google has released a new version of its client app for Android Market, which will work on any smartphone running Android OS 1.6 or higher.

The company aims to facilitate the process of discovering new software and its purchase. That’s why new Android Market will have a Cover Flow-like style of app listings and include new categories like Widgets and Live Wallpapers, as currently the catalog is filled pretty much with these kinds of software. Besides that, app pages will now have more info and links to related content.

Some changes were made to the policy of software returns. If earlier user could take his money back in case he didn’t like the app he bought within 24 hours, now this time is shortened to 15 minutes.

As the number of Android devices continues to grow and it becomes hard for developers to make their apps hardware compatible with as many existing handsets as possible, Google presents its new solution:

“To make it easier for developers to distribute and manage their products, we will introduce support for device targeting based on screen sizes and densities, as well as on GL texture compression formats.”

Another important feature of new Android Market is a new limitation of app file size, which is now extended to 50 MB (earlier it was 25 MB). This is still 40 times smaller than the current limitation for iOS apps (2GB). This can be explained by the fact that iOS apps can be downloaded not only via its mobile client (like apps for Android), but also via iTunes, that can be connected to the Internet in any possible way and thus capable to download such amounts of information. Nevertheless, some developers pass this limitation by offering tiny apps for Android that can download necessary files (like music, textures, video) of any size after its purchase.

However, Google’s attempts to create a rival to an App Store still are not successful as they can be. AppleInsider has studied the subject and revealed that the Android’s openness has led to a number of cases when popular titles like Radiant were cracked to be used as illegal copies by “97% of players in Asia, 70% in Europe and 43% in North America”. That’s why most of developers like Rovio (which created Angry Birds) offer free versions of their apps to earn money from showing the ads. But that kind of income is not as profitable as offering paid apps, which makes iOS more attractive for developers than Android.

It was also noted that Android Market offers poor security for users, though this situation can be changed by cleaning up the store. At least, that was what the developer of DoubleTwist Jon Lech Johansen advised Google more than a half a year ago, but the company has not still made any steps in that direction.

Apple has reportedly disabled its jailbreak detection API through iOS 4.2 software update. The API helped third-party mobile device management (MDM) applications to check for unauthorized modifications of system files. Apple’s jailbreak detection API provided MDM applications direct access to iOS system information and was able to ask the operating system directly if it had been jailbroken. Jailbreak exploits typically change a number of operating system files, and exploit one or another low-level OS features to let users directly load their own or third-party applications.

“We used it when it was available, but as an adjunct,” says Joe Owen, vice president of engineering at Sybase, which offers the Afaria device management software. “I’m not sure what motivated their removing that….”