From a tweet by MuscleNerd, it looks like GeoHot may surprise us once again because he has an untethered jailbreak exploit for iOS 4.2.1. Before that GeoHot made a surprise come back and released Limera1n jailbreak for iOS 4.1.
Dev-Team has just released RedSn0w 0.9.6rc7 with One-click boot option for tethered iOS 4.2.1 jailbreak devices. With RedSn0w 0.9.6rc7, there’s no need to select firmware files each time you need to boot your tethered jailbreak device.
Greenpois0n RC5, the iOS 4.2.1 jailbreak for iPhone 4, 3GS, 3G, iPod Touch 4G, 3G and iPad will be out soon! p0sixninja, the dev behind Greenpois0n has confirmed in a tweet that Greenpois0n RC5 is right around the corner.
RedSn0w 0.9.7 beta to jailbreak iOS 4.2.1 untethered is now available for download. You can download RedSn0w 0.9.7b from below. It’s the backup plan for the Untethered jailbreak which required iOS 4.2 beta 3 SHSH blobs. Currently the Redsn0w 0.9.7b is Mac OS X only and limited to iPhone 4, iPad, and iPod touch 4G.
According to MuscleNerd, Untethered Jailbreak for iOS 4.2.1 with RedSn0w is about ready. The New RedSn0w will not only jailbreak iOS 4.2.1, already jailbroken (tethered) users can use this new RedSn0w to re-jailbreak to get untethered support without any restore (all installed jailbreak tweaks will stay).
iOS 4.2.1 firmware for Apple TV 2G is now available for download. You can download iOS 4.2.1 Apple TV 2G build 8C1540 from the link below. The iOS 4.2.1 to Apple TV 2G should also be available under updates shortly.
Dev-team and Comex has confirmed that untethered iOS 4.2.1 jailbreak will be out before Christmas 2010. First MuscleNerd came up with a video demonstrating untethered iOS 4.2.1 jailbreak on iPod Touch 4G.
Redsn0w 0.9.6b5 can jailbreak iOS 4.2.1/4.1 and update iPhone 3GS / 3G baseband to 06.15.00 which is unlockable with UltraSn0w 1.2. Those iPhone 3GS/3G users stuck with Baseband 05.15.04 & 05.14.04 need to update baseband to the iPad baseband 06.15.00.
Redsn0w 0.9.6b5 to jailbreak iOS 4.2.1 and update baseband to 06.15.00 is out now! You can download RedSn0w 0.9.6b5 for Mac & Windows from the links below. Those iPhone 3GS/3G users stuck with 05.15.04 & 05.14.04 baseband need to update baseband to 06.15.00 which is unlockable.
UltraSn0w 1.2 is out to unlock iPhone 3Gs/3G iOS 4.2.1. This guide is on how to unlock iPhone 3GS or 3G iOS 4.2.1 baseband 006.15.00 with UltraSn0w. iPhone 3GS / 3G unlock instructions can be found below.
iOS 4.2.1/4.1 unlock for iPhone 3GS and iPhone 3G will drop by Sunday, 28th November, according to MuscleNerd. UltraSn0w will unlock iPhone 3GS/3G on iOS 4.2.1/4.1 on Sunday, however, iPhone 4 unlock will take little longer.
Semaphore has released TinyUmbrella 4.21.01 that can save SHSH blobs for iOS 4.2.1 (iPhone, iPad and iPod Touch). Step-by-step instruction to save iOS 4.2.1 SHSH blobs and TinyUmbrella 4.21.01 download links after the jump…
AppSync 4.2 for iOS 4.2 jailbroken firmware is now available in the Cydia. AppSync 4.2 patches MobileInstallation file and lets you install cracked apps on iOS 4.2. Once you’ve AppSync for iOS 4.2.1 installed on your iPhone/iPad/iPod Touch running jailbroken iOS 4.2.1, you’ll be able to install cracked apps (.ipa).
Dev-Team has release RedSn0w 0.9.6b4 to jailbreak iOS 4.2.1 on iPhone 4, 3GS, 3G, iPod touch 4G, 3G, 2G and iPad. RedSn0w 0.9.6b4 jailbreaks iOS 4.2.1 with working Cydia and MobileSubstrate. Step-by-step instructions on how to jailbreak iOS 4.2 with RedSn0w 0.9.6b4 after the jump…