Redsn0w Untethered Jailbreak [Backup Plan] for iOS 4.2.1 Confirmed and will be released on christmas!

Since Comex’s untethered jailbreak for iOS 4.2.1 has been delayed, MuscleNerd of iPhone Dev-Team has announced that they are going to release their “backup plan” for untethered iOS 4.2.1 jailbreak over the Christmas weekend. However before they do a general release, they are looking for testers to try out this latest version of Redsn0w. The requirements for testing Redsn0w for iOS 4.2.1 untethered jailbreak are as follows:

Over the Christmas weekend we’ll be releasing a version of redsn0w that implements the “backup plan” to the 4.2.1 untethered jailbreak.  We’re seeking your help to test this redsn0w and find any bugs before we do a general release!
(If you have an iPhone 3G, or an old-bootrom ipt2g or iPhone 3GS, you already have an untethered jailbreak!  Just use the latest public redsn0w.)
To keep things manageable, this will be a Mac-only test program.  We also request that any volunteers *NOT* need the ultrasn0w unlock (in case things go very wrong).
Right now, the “backup plan” requires that you have the 4.2b3 IPSW on your Mac, and that Cydia has your 4.2b3 SHSH hashes.  Please don’t pirate that 4.2b3 IPSW!  (We’re also working on a way that this technique might apply to all those with 4.1 IPSWs, but that’s not the first goal right now.)
If you fit all the above qualifications, please follow @redsn0w_testers on twitter for announcements, and use the comments section here for feedback.  Thanks very much for your help, and Happy Holidays!

So yea, if you fit all the requirements stated above, you are good to go! We will of course keep you updated ! Stay tuned !

For more news coverage, you can follow us on Twitter or become a fan on our Facebook page, we will keep you updated with posts over the web.