According to popular iPhone Dev Team hacker, MuscleNerd, an untethered jailbreak solution for iOS 4.2.1 on the iPhone 4 will be arriving this week including all A4-based Apple devices, such as the iPod Touch 4 and the iPad as well. But now he deleted the tweet which only points towards the fact that the team won’t be able to deliver by Christmas?

scotty6kids78: @MuscleNerd are we any closer to the unteathered #jailbreak for the new #ios4.2 on #iphone4 ?

MuscleNerd: @scotty6kids78 it’ll be here by Xmas (not because we’re sitting waiting for Xmas, but because it’s achievable deadline)

For those of you who don’t already know, a tethered jailbreak means that you will see a “connect to iTunes” logo until you run the jailbreak software every time you reboot your iPhone, iPad, or iPod Touch. It isn’t too bad but if your iDevice reboots while you are away from your computer, you cannot use your device until you re-run the jailbreak software again on your computer.

While we aren’t sure about the status of the window, we do know that the tethered jailbreak solution will be released very soon. We will keep you updated as soon as more information comes in. You can follow us on Twitter and/or subscribe to our RSS feed.