BusyDizzys

Might be usefull for some so we posted it, no need for mega hacking the phone to bits in this guide.

Stol3d from Wiki and what?

"If you’ve got a Samsung Vibrant and want to take advantage of that unlimted 3G account you can tether without rooting the phone. This method uses a USB cable to provide internet access to Windows XP and Windows 7 computers. Samsung’s own Kies software handles the tethering, as long as you have the magic number to get connected on T-Mobile USA networks; ‘epc.tmobile.com’ for the APN name and ‘*99#’ as the phone number. The video after the break which takes you through the tethering ritual."

...