Untethered Jailbreak for iOS 4.2.1 is Coming Soon [Video]

Finally, iPhone Dev Team member MuscleNerd has confirmed through twitter that he has achieved the untethered jailbreak to work on the iOS 4.2.1 and will be out before Christmas 2010.

For those who don’t know ,Tethered means that the jailbreak needs to be reapplied every time you power down your jailbroken iDevice. If you let the battery run out or restart your iDevice then you will need to reapply the jailbreak.

According to MuscleNerd, it’s a backup plan for untethered iOS 4.2.1 Jailbreak because comex is working on a more extensible one, but this method is also generalizable. This method Uses iOS 4.2 beta 3 SHSH blobs Cydia kept for you.

Here are the latest updates from MuscleNerd’s Twitter account.

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

(It’s a “backup plan” because comex is working on a more extensible one, but this method is also generalizable)

ipt4g 4.2.1 untethered JB w/4.2b3 kernel: http://is.gd/inE4e … Wastes no exploits, but upcoming @comex JB maybe better

You can also check out the video below, showing the untethered jailbreak working for iPod Touch 4G iOS 4.2.1.

comex has also confirmed on Twitter that he will release the untethered iOS 4.2.1 jailbreak on Christmas so that means we’ll see iOS 4.2.1untethered jailbreak before the end of 2010.

We will update you as soon as we get any information on this, stay tuned with us on Twitter or Facebook Fanpage.