iPhone hacker i0n1c has updated a YouTube video showing a Jailbreak of iOS 4.3 using a new undiscovered exploit to indicate that his Jailbreak may become available as soon as this week. The new Jailbreak would be compatible with any device that is susceptible  to the Limera1n exploit, which means pretty much all iOS 4.3 devices except for the iPad 2.

In the description of the video he explains that the Jailbreak is untethered and that he would like to see the Dev Team release a tethered Jailbreak for iOS 4.3, which they already have, before he releases it.

This video demonstrates my iPad 1 running untethered jailbroken iOS 4.3

The jailbreak uses a *UNDISCLOSED* exploit in the iOS Kernel. Installation is similar to previous iOS versions which means you require a bootrom exploit (or something else) to install it in the root partition.

Because there is no public bootrom exploit for the iPad 2 at the moment it will not work for now.

However the jailbreak can be made compatible with all devices that are vulnerable to the limer4in exploit and that are supported by iOS 4.3

Because of several changes in iOS 4.3 in comparison to iOS 4.2.1 the jailbreak is NOT READY yet. That is what the *ALPHA* means. I need some time to check what kernel patches are actually required to work 100%ly.

However I recommend the dev-team or chronic-dev to first release a *tethered* iOS 4.3 so that everyone can test if their nice feature actually work. I guess most people require Mobile Substrate to work and AFAIK it does not work due to ASLR. It would be a waste if Apple kills an untethered jailbreak before Mobile Substrate works.

That said I will release the jailbreak when a) there is no other untether by the time I am finished b) if MobileSubstrate works.

Any report that I wait for iOS 4.3.1 is just a misinterpretation of my words.
I merely think that Apple should release a iOS 4.3.1 soon, because it is in their interest to not wait for several months when everyone knows that there is a remote exploit in MobileSafari that might have leaked during the #PWN2OWN contest.

Check back in the next days for more information about when and where you can get it.

DO NOT LET YOURSELF GET SCAMMED BY ALL THE OTHERS TRYING TO SELL YOU THIS EXPLOIT. IT WILL NOT LEAVE MY HOUSE BEFORE IT IS FINISHED.

Because so many people are asking for an ETA:

I am pretty sure that the untether will be released before the next weekend. I was using older kernel patches that caused lagging on the jailbroken device. I will change that and then port it to the other devices and release.

He mentions that his release of the new Jailbreak method is contingent on wether the Mobile Substrate is ready to support iOS 4.3 and whether anyone else beats him to the punch with a Jailbreak. Mobile Substrate is the communication layer that many Jailbreak apps need to run properly on iDevices and if it’s not ready for iOS 4.3, which it currently is not, then many apps will not run properly on 4.3.

We would likely see this new exploit built into a new version of Redsn0w.