PwnageTool 5.1.1 allows to create custom firmware and preserve modem version for unlock with ultrasn0w or Gevey. PwnageTool 5.1.1 supports all A4 devices:
iPhone 3GS
iPhone 4
iPad 1
iPod Touch 3G
iPod Touch 4G
Apple TV 2G
You can download RedSn0w 0.9.12b1 here and PwnageTool 5.1.1 here.
iOS 5.1.1 untethered jailbreak tutorial using Redsn0w is available here.
RedSn0w
redsn0w allows owners of A4+earlier devices to install rocky-racoon two different ways:
backup/restore method similar to Absinthe and cinject
its traditional limera1n-based ramdisk install. If you have a lot of media on your A4 device (music, movies, TV shows, etc), then the ramdisk method is preferrred because it avoids any possibility of later problems related to syncing to iCloud (including Photo Stream and Music Match). The ramdisk method is not available for A5 devices or later because limera1n can’t be used. If you’d like to use redsn0w’s ramdisk method, just be sure to put the A4 device in DFU or Recovery mode before starting redsn0w (otherwise it will immediately start to use the backup/restore method).
We’ve also added a new redsn0w feature specifically for those who got in on the SAM unlock: you can now include your SAM tickets as part of your initial ramdisk jailbreak of iPhone4 or earlier, or alternatively you can upload your SAM tickets to any device after its been jailbroken. redsn0w accepts either the individual SAM activation ticket plist file, or the entire zip file created by redsn0w’s “Backup” button. As usual, redsn0w continues to cover all of its previous jailbreaks and untethers (so redsn0w-0.9.12b1 covers everything from 5.1.1 all the way back to 4.1).
PwnageTool
PwnageTool also avoids any possible sync issues, but again it applies only to A4+earlier devices. If you unlock your iPhone with ultrasn0w or a commercial method, you must use PwnageTool to avoid updating your baseband otherwise you’ll lose the unlock. PwnageTool will also jailbreak+untether the AppleTV2,1 5.0_2B206f (unless you customize the IPSW further, you’ll have just basic SSH access to the device).
Just like version 2.9.4 the new 2.9.5 version supports untethered jailbreak of A4 devices on iOS 5.1.1. Sn0wbreeze can be used to create a custom firmware with jailbreak and preserve iPhone modem (baseband) version for unlock.
Sn0wbreeze 2.9.5 supports iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G and Apple TV 2G. It does not work with A5 devices, like iPad 2, iPad 3 and iPhone 4S.
iH8Sn0w released Sn0wBreeze 2.9.4 with the ability to perform an untethered jailbreak of A4 devices on iOS 5.1.1. Sn0wbreeze can be used to create a custom firmware with jailbreak and preserve iPhone modem (baseband) version for unlock.
Sn0wbreeze 2.9.4 supports iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G, iPod Touch 4G and Apple TV 2G. It does not work with A5 devices, like iPad 2, iPad 3 and iPhone 4S.
InteVyDis has released an untethered jailbreak for A4 devices on iOS 5.1.1 as part of Vulndisco Mobile 1.7. The module is vd_ios_untether_5_1_1. It works by creating a custom bundle you have to install via RedSn0w. Evgeny Legerov posted in twitter:
vulndisco mobile 1.7 is out with untethered 5.1.1
This jailbreak is not free and costs big money. It works only on A4 devices -- iPhone 3GS, iPhone 4, iPad 1, iPod Touch 3G and iPod Touch 4G. It is not yet tested by other hackers. So this might be fake. However famous hacker I01nc notes that the company is a legit source of exploits:
@legerov runs a company: Intevydis that sell exploit packs for many years. If that JB were fake he would hurt his own business.
The unfortunate thing is that now two sets of exploits may be revealed to Apple and some people may pay for the expensive exploit pack despite it being available free in a few days from pod2g.
MuscleNerd tweets:
the most troublesome part is that (potentially) close to 2x as many exploits will be burned now with 2 A4 JBs.
We recommend that you wait the extra day or two for a free jailbreak from pod2g that should work on all devices.
Version 0.9.11b4 completes the tethered JB support for 5.1.1 on A4 devices and earlier, including proper “Stitching” and “Custom” creation of NO_BB IPSWs.
Sadly pod2g has discovered that his untether does not work on the iPod 3G or iPhone 3GS, according to a recent tweet by the hacker.
Sad news. Just tested the untether on an iPod 3G. The kernel vulnerability don’t happen on this one. I think iPhone 3Gs is out too.
the iOS version don’t really matter. It’s about the hardware.
This means these devices can only be tethered jailboken.
This will be disappointing news for many although it’s possible a kernel vulnerability could yet be found for these older devices. For those wondering, pod2g reminds us that the old bootrom 3GS will be untethered jailbroken for life.