Name says it all guys, I found this on the net, it automatically downgrades the baseband down to 2.2.8, so then you are able to use yellowsn0w to unlock your iPhone 3G. Beware, i have not tested this, so i can not confirm it works. Use it at your own risk, i do not at any stage want to be blamed for any damage YOU may cause. I'm just passing on info
This is a new tool released that automatically downgrades your iphone 3g’s modem baseband to 2.28 which in turn lets you run the iphone 3g unlock codenamed yellowsn0w released by the iphone dev team.