For those of you wondering if you can ever tether your Samsung Vibrant as a 3G USB modem, you can using the hidden “Samsung Kies” feature, which allows you to use your Samsung Vibrant as a 3G USB modem.
The best part? It requires no rooting just couple clicks to download the free software from Samsung’s site, then set it up.
For full step-by-step instructions, head over to Samsung Vibrant Hacks!
By the way, this should also work on other Samsung Galaxy S phones but you will need to change the network provider settings under Samsung Kies software.