Edit: NEVERMIND. You don't want to tether. You can no longer use this function you are describing
AFAIK. It was called Quick to Net, ie circuit switched data and I believe they are charging for it now. Someone correct me though if I'm wrong.
-Go to phone screen.
-##778, Send.
-Edit.
-000000
-View Info, Security.
-Change "S.IP DUN User name" from
XXXXXXXXXX@dun.vzw3g.com to
XXXXXXXXXX@vzw3g.com
-View Info, M.IP Default Profile.
-Change "DUN NAI" from
XXXXXXXXXX@dun.vzw3g.com to
XXXXXXXXXX@vzw3g.com
(XXXXXXXXXX is your VZW mobile number)
-Menu, OK.
-OK to soft reset.
This method works whether you have flashed to a custom ROM or if you are on stock ROM, ie. using Modem Link or Internet Connection Sharing.