Need help - iPhone specialists only

I have a problem after jailbreaking my iPhone 3G of NO SERVICE at all, I've tried many ways to fix it, couldn't work, the only chance is downgrading and then doing it again, but that's a bunch of long time, so I wanna ask if some of you might know another way of fixing it.

Thanks!

 

You have to use the new Firmware "Pwnge" made.

Google search "iPhone firmware 8B117"

It comes with directions, or just post back here and I can walk you through it.