The Dev-Team, an iPhone hacking group, has released a free jailbreaking and unlocking tool for the iPhone 3.0 OS.
Called UltraSn0w, the easy to use unlocking tool jailbreaks the 3.0 iPhone to allow unauthorized apps and unlocks it for use with other carriers.
Available for Windows and Mac OS X (though not PowerPC machines), the instructions are:
1. Ensure you have upgraded to iPhone OS 3.0
2. Jailbreak your iPhone 3G using redsn0w or PwnageTool (this will also install Cydia/Icy)
3. Run Cydia or Icy
4. Please add the repo repo666.ultrasn0w.com to Cydia or icy
5. Search for ‘ultrasn0w’ in cydia or icy and install ultrasn0w
6. Reboot your iPhone 3G
7. T-Mobile USA users should disable 3G before using ultrasn0w
8. Enjoy
The Dev Team promises a fix for the iPhone 3GS, but hasn’t promised any delivery time.
Here’s a video tutorial for using UltraSn0w from iClarified. And here’s the text instructions with a bunch of nice screenshots.