Every time Apple releases a new firmware it stops the ability to restore to an older firmware. If you need to restore to old firmwares you need to save your SHSH keys as soon as possible.
Here are instructions on how to backup your SHSH blobs using TinyUmbrella utility for Mac OS.
Step One
Download the latest version of Firmware Umbrella from here to your Desktop.
Every time Apple releases a new firmware it stops the ability to restore to an older firmware. If you need to restore to old firmware you need to save your SHSH keys as soon as possible.
Here are instructions on how to backup your SHSH blobs using TinyUmbrella utility for Windows.
Step One
Download the latest version of TinyUmbrella from here to your Desktop.
iH8sn0w has released new version of popular jailbreak utility Sn0wBreeze 2.9. Sn0wbreeze is used to create a custom firmware with jailbreak and preserve iPhone modem (baseband) version for unlock. New version 2.9 adds support for untethered iOS 5.0.1 jailbreak as well as support for all firmwares supported by previous versions of sn0wbreeze.
UPDATE: Apple released new iOS versions and has stopped signing all other firmwares, including iOS 6.1.2 and iOS 5.1.1. This means you can NOT restore to 6.1.2/5.1.1/4.3.3 and others any more (both original and custom), unless you have saved your SHSH keys for it.
If you have decided to perform an untethered jailbreak and unlock, you need to get the following information:
What type of device do you have (iPhone 3G/3GS/4, iPod Touch 3G/4G, iPad 1/2, Apple TV)?
Do you need unlock (if your iPhone locked to one carrier and you want to use it with another)?
The answer is NO, if the device is not iPhone, if it was purchased as factory unlocked and can be used with any cellular carrier (f.e. in Canada, France, etc).
If the answer is YES, you need to find out your modem version (Setting-General-About-Modem).
What firmware version do you have? Take a look at Setting-General-About-Version. For example it could be iOS 4.3.3.
What operating system do you use on your desktop (Windows, Mac OS)?
How to perform jailbreak, when you do NOT need an unlock
For iPhone 3G the latest is iOS 4.2.1. You can perform jailbreak with any utility. For iOS 4.2.1 you can also use them or GreenPois0n (Windows, Mac OS).
iPad 2 jailbreak is available for iOS 4.3.3 via JailbreakMe and iOS 5.0.1 / iOS 5.1.1 via Absinthe, iOS 6.0-6.1.2 and iOS 7.0-7.0.4 via Evasi0n, iOS 7.1-8.1 via Pangu, iOS 8.1.1-8.4 via TaiG, untethered iOS 9.0-9.0.2 via Pangu9.
iPad 3 jailbreak is available for iOS iOS 5.1.1 via Absinthe, iOS 6.0-6.1.2 and iOS 7.0-7.0.4 via Evasi0n, iOS 7.1-8.1 via Pangu, iOS 8.1.1-8.4 via TaiG, untethered iOS 9.0-9.0.2 via Pangu9.
iPhone 4S jailbreak is available for iOS 5.0 / iOS 5.0.1/ iOS 5.1.1 via Absinthe, iOS 6.0-6.1.2 and iOS 7.0-7.0.4 via Evasi0n, iOS 7.1-8.1 via Pangu, iOS 8.1.1-8.4 via TaiG, untethered iOS 9.0-9.0.2 via Pangu9.
iPhone 3GS, iPhone 4, iPod Touch 3G, iPod Touch 4G, iPad jailbreak is untethered for iOS 5.1.1 and iOS 6.0-6.1.4.
iPhone 5/5C/5S/6/6plus, iPad 4, iPod Touch 5G jailbreak is untethered for iOS 6.0-6.1.2 and iOS 7.0-7.0.4 via Evasi0n, untethered for iOS 7.1-8.1 via Pangu, iOS 8.1.1-8.4 via TaiG, untethered iOS 9.0-9.0.2 via Pangu9.
iPhone 6S / 6S+ / 6 / 6+ jailbreak is untethered for iOS 8.1.1-8.4 via TaiG, untethered iOS 9.0-9.0.2 via Pangu9.
iPad Mini / Mini 2 / Mini 3 / Mini 4 / Air / Air 2 jailbreak is untethered for iOS 7.0-7.0.4 via Evasi0n, untethered for iOS 7.1-8.1 via Pangu, iOS 8.1.1-8.4 via TaiG, untethered iOS 9.0-9.0.2 via Pangu9.
iOS 4.3.3
Apple stopped signing iOS 4.3.3, so you cannot update to iOS 4.3.3 without SHSH keys saved (in advance some time ago). If you have iPhone 4, iPhone 3GS, iPad 1, iPod Touch 3G or iPod Touch 4G that run iOS 4.3.3 - use JailbreakMe or RedSn0w to untether jailbreak your device.
If you have saved SHSH keys for iOS 4.3.3 you can use PwnageTool (Mac OS) or Sn0wBreeze (Windows).
iOS 4.3.4/4.3.5
For iOS 4.3.4/4.3.5 only tethered jailbreak is possible with redsn0w. Tethered means that each time you restart your device you will have to connect it to a computer and run redsn0w. The untethered iOS 4.3.5 jailbreak is possible only for iPhone 3GS with old bootrom. You can detect your bootrom version using this tutorial.
iOS 5
To jailbreak and unlock iOS 5 use latest version of redsn0w 0.9.9 or sn0wbreeze 2.8. You can jailbreak tethered or semi-tethered.
The untethered iOS 5 jailbreak is possible only for iPhone 3GS with old bootrom. You can detect your bootrom version using this tutorial.
iOS 5.0.1
For iPhone 4/3GS, iPad 1, iPod Touch 3G/4G an untethered jailbreak is available for iOS 5.0.1. For untethered jailbreak use the latest redsn0w 0.9.10 or Corona - package from Cydia to untether currently installed tethered jailbreak.
Tutorial how to untether installed tethered jailbreak is available here.
For iPhone 4S and iPad 2 use Absenthe.
For tethered iOS 5.0.1 jailbreak you an use redsn0w 0.9.9 and sn0wbreeze 2.8.
iOS 5.1
For now only tethered jailbreak is available for iPhone 4/3GS, iPad 1 and iPod Touch 3G/4G for iOS 5.1.
iOS 5.1.1
You can do an untethered jailbreak for iPhone 4S, iPhone 4, iPhone 3GS, iPad 3, iPad 2, iPad 1, iPod Touch 3G, iPod Touch 4G and Apple TV2G.
Use Absinthe 2.0.4 or RedSn0w 0.9.12 (for all iPhones, iPods and iPads), Sn0wBreeze 2.9.5 (for all A4 devices) and Seas0npass (for Apple TV 2G).
Tutorial how to untether installed tethered jailbreak is available here.
iOS 6.0-6.1.2
Untethered jailbreak is available for all devices with iOS 6.0 - iOS 6.1.2. It is called Evasi0n.
iOS 6.1.3-6.1.5
Tethered jailbreak is available for old devices (iPhone 3GS, iPhone 4, iPod Touch 4) and Cydia package to make it intethered.
iOS 7.0 - 7.0.4
Untethered jailbreak is available for all devices with iOS 7.x, including iPhone 5S/5C and iPad Air. Utility is called Evasi0n 7.
iOS 7.1 - 7.1.2
Untethered jailbreak is available for all devices with iOS 7.x, including iPhone 5S/5C and iPad Air. Utility is called Pangu.
iOS 8.0 - 8.1
Untethered jailbreak is available for all devices with iOS 8.x, including iPhone 5S / 5C / 6 / 6+ and iPad Air /Air 2 / Mini / Mini 2 / Mini 3. Utility is called Pangu8.
iOS 8.1.1 - 8.4
Untethered jailbreak is available for all devices with iOS 8.0-8.1.2 including iPhone 5S / 5C / 6 / 6+ and iPad Air /Air 2 / Mini / Mini 2 / Mini 3. Utility is called TaiG.
iOS 9.0 - 9.0.2
Untethered jailbreak is available for all devices with iOS 9.0-9.0.2 including iPhone 6S / 6S+ / 6 / 6+ / 5S / 5C / 6 / 6+ and iPad Air /Air 2 / Mini / Mini 2 / Mini 3. Utility is called Pangu9.
This is step-by-step instructions on how to perform jailbreak of your iPhone 3GS on iOS 4.3.5 firmware using RedSn0w 0.9.8b7b for Windows.
If you have iPhone 3GS with an old bootrom version 359.3, the jailbreak is untethered. If your device has bootrom version 359.3.2 and higher, jailbreak will be tethered. You can detect your bootrom version using this tutorial.
Tethered jailbreak means that each time you restart your device you will need to connect it to a computer and run redsn0w.
If you have other device, here are links to our RedSn0w 0.9.8b7b iOS 4.3.5 jailbreak tutorials:
RedSn0w can perform a tethered jailbreak on iOS 4.3.5 for all devices except the iPad 2, according to MuscleNerd's tweet:
So those who really do want tethered 4.3.5 can use redsn0w pointed at 4.3.4 (except iPad2)
We strongly recommend NOT to update to iOS 4.3.4 or iOS 4.3.5 to preserve untethered jailbreak. We will soon post step-by-step tutorials on how to perform iOS 4.3.5 tethered jailbreak.
The iPhone Dev-Team has released RedSn0w 0.9.8b3 which can perform a tethered jailbreak on iOS 4.3.4. This means that you will have to connect your device to a computer and run redsn0w each time you restart.
For the convenience of kernel hackers like @comex and @i0n1c, we have a new redsn0w 0.9.8b3 that supports a TETHERED jailbreak for iOS 4.3.4 on all devices that have 4.3.4 except the iPad2. The vast majority of people will want to stay back at 4.3.3 because that's where the untethered jailbreak is! There are no new features in 4.3.4 - only fixes for jailbreak exploits.
Also, this is a good time to remind everyone (since we're still seeing confusion about this): iPad2 owners with a baseband (3G or CDMA) cannot currently use saved blobs to go back to 4.3.3 once the signing window is closed. This is unlike every other device, so don't be confused! iPad2 owners with basebands should stay away from all updates to maintain your jailbreak!
This jailbreak works with iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G and iPod Touch 4G. It does not work with iPad 2.
You can download RedSn0w 0.9.8b3 from here: (Mac, Windows)
Apple have recently released iOS 4.3.4 for iPhone 4, iPhone 3GS, iPad 1, iPad 2, iPod Touch 3G and iPod Touch 4G. Here are the direct links for each device that is supported by the update:
Famous iPhone hacker Stefan Esser, also known as i0n1c, recently wrote on twitter that we should not expect untether jailbreak for iOS 4.3.4 anytime soon. i0n1c was the one who created untether for iOS 4.3.3 firmware.
Our advice is simple - save your 4.3.3 SHSH keys asap. With these SHSH keys you will be able to restore to iOS 4.3.3 anytime, without - only iOS 4.3.4. Here are tutorials for you.
Apple has released iOS 4.3.4 to block the PDF exploit used by comex in JailbreakMe utility. JailbreakMe can wireless jailbreak all devices on iOS 4.3.3.
iOS 4.3.4 Software Update
Fixes security vulnerability associated with viewing malicious PDF files.
As you might know hacker Comex has found a new PDF vulnerability and released JailBreakMe tool that uses it. These were great news. The bad ones is that your iPhone and iPad and iPod Touch is at risk. Bad guys can use the same vulnerability to take control of your device and do whatever they want with it.
Apple will fix it in iOS 4.3.4 firmware some day. Fortunately Comex has already released a patch for his JailbreakMe 3.0 exploit to protect already jailbroken devices from any malicious use of the exploit.
The package called 'PDF Patcher 2' can be downloaded and installed from Cydia. To jailbreak please use our step-by-step instructions.
This is step-by-step instructions on how to perform untethered jailbreak of your iPod Touch 3G и iPod Touch 4 with iOS 4.3.3 firmware using JailbreakMe. This jailbreak works in iPod Touch Safari browser. You need a computer only to update to iOS 4.3.3.
This is step-by-step instructions on how to perform untethered jailbreak of your iPhone 3GS и iPhone 4 with iOS 4.3.3 firmware using JailbreakMe. This jailbreak works in iPhone Safari browser. You need a computer only to update to iOS 4.3.3.