You'll need to get Wifi Tether android-wifi-tether - Wireless Tether for Root Users - Google Project Hosting You'll want to find/install 3.0-pre14.
Open that, and in the profile select "Epic", setup your password or leave the default, and you're good to go
If you are in a 4g area, you'll need to enable 4g AFTER starting up the tether, or it won't function.