- Firmware 3.0 Beta 4 for iphone 3G
- prerelease itunes 8.2
- QuickPwn for Beta 4
- Shift + Restore or Shift + Upgrade for the 3.0 firmware beta 4
- Run QuickPWN Beta 4 for icy
- Follow onscreen instructions and when it says recovery mode, unplug your iphone, turn it off, wait 10 seconds, hold home for 5 seconds, then plug it in, continue following the onscreen instructions.
- Enjoy jailbroken 3.0 beta 4 [source]