Yep, The iPhone Dev Team have done it again! They have successfully unlocked and jailbroken the iPhone 3G S. But, unfortunately, they do not have an announced release date but will most likely be released after iPhone OS 3.1 is released by Apple.

From iPhone Dev Team’s blog:

Our ultrasn0w program uses the at+xlog crash as an injection vector of our unlocking payload — and it does so on the 3GS in exactly the same way as on the 3G! But this injection vector will be lost if you update to 3.1 using the official Apple IPSW, which updates the baseband. So stay away from official 3.1 IPSWs until we release the tools that let you update the firmware without updating the baseband.

The iPhone Dev Team urge you not to update to iPhone OS 3.1 if you want to be able to unlock your iPhone 3G S. You have been warned!

- source: blog.iphone-dev.org

Well, I know many of you have been waiting for this news, so here it is: iPhone Dev Team has found out that 24kpwn, the same exploit used to crack open into the iPod Touch 2G, lives in the iPhone 3GS bootrom. That means the iPhone Dev Team can apply the same technique that they use to jailbreak and unlock on their current redsn0w tools. The baseband is also exploitable with ultrasn0w. Awesome news, ey?

From iPhone Dev Team:

Important: Apple has not given up on the cat&mouse game, and in fact there are challenging aspects of the 3GS jailbreak that aren’t in the other devices. It’ll take some time to work these into our tools, but the fundamental weaknesses are there: The bootrom is exploitable via 24Kpwn, and the baseband is exploitable via ultrasn0w. (And just like with the 3G, ultrasn0w for 3GS requires that you not update your baseband when Apple comes out with new firmware.)

If you would like to know the technical notes, from the iPhone Dev Team, on where the 24Kpwn exploit is in the 3GS visit here

Now it’s time to wait for the iPhone Dev Team develop and release the tools for users to use and jailbreak and/or unlock their iPhone 3GS’

- source: blog.iphone-dev.org