These instructions can be found
HERE:
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. That last o is actually the number zero 0! If you use the letter o youll get an error.
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
Enjoy
#4 took me a while to figure out...
Open Cydia
- Tap "Manage" at the bottom of the screen
- Tap "Sources" in the middle of the screen.
- Tap "Edit", top right corner
- Tap "Add", top left corner
- Type in repo666.ultrasn0w.com (DO NOT clear the "http://", so it should say "http://repo666.ultrasn0w.com")
- Tap "Add source"
- Once it finds it and loads some things, Tap "done", upper right corner
- Click on the Source you just created and install it
Good luck