Suggest you try this thread:
http://forum.ppcgeeks.com/showthread...nating+account
The Roaming Only tweak works for me here on the outskirts of Tucson but I only turn it on when I need it and I don't tether much. If you over-use it, Sprint enforcers in black trenchcoats show up at you door. The Terminating thread talks about an AirWave/AirRave thing. I don't know what it is but it sounds like the ultimate problem solver and some people have gotten it for free from Sprint. See thread above for details.