Yeah! iPhone Dev Team to the rescue, yet once again with the release of redsn0w version 0.8! This new version of redsn0w now works with the iPhone 3G S. Yep, so if you didn’t want to use purplera1n for whatever reason, then you can now use iPhone Dev Team’s Redsn0w!

From the Dev Team:

ultrasn0w unlockers — You all must remain particularly vigilant against upgrading your basebands, since doing so will kill the unlock (for most phones, there’s no going backwards in baseband version). Apple has gotten very serious with the latest baseband — they’ve removed 180 (!) commands in an effort to cut down their exposure to holes. So please always stay away from stock Apple IPSWs and instead use our tools as we release them. These tools let you update your firmware without updating your baseband.

If you’re a Linux user and had to use a Windows machine or a Mac machine to jailbreak your iPhone, then you may be very pleased to know that redsn0w is finally available for Linux!

Since Redsn0w version 0.8 has the same user interface as it’s previous version, the tutorial we posted a few days ago will be exactly the same for the iPhone, iPhone 3G and iPhone 3GS aswell as iPod Touch’s.

And if you want to unlock using ultrasn0w, then read this tutorial

Download Redsn0w 0.8 from our iPhone Downloads section:
Redsn0w 0.8 for Windows
Redsn0w 0.8 for Mac OS X
Redsn0w 0.8 for Linux

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