When Apple released iOS 4.2.1 last month, it was already possible to jailbreak any iPhone, iPod touch, or iPad running the operating system using the Redsn0w jailbreak utility. There’s just one problem: Redsn0w provides a tethered jailbreak, which means that any time you want to reboot your iOS device you need to connect it to a computer using a USB cable. The same is true if your phone battery dies.
But now it looks like an untethered jailbreak for iOS 4.2.1 is coming soon. Famed hacker MuscleNerd has posted a video showing a jailbroken iPod touch 4th generation rebooting. There are no wires anywhere in sight, but after rebooting MuscleNerd opens the Cydia store and other apps that are only available on jailbroken devices.
The new tools aren’t available yet, but when they are you’ll probably be able to find instructions at the iPhone Dev Team blog.
You can checkout the video after the break.