Hey guys i stumbled upon this site and it applied a carrier update to my phone and I am able to use tethering.
http://help.benm.at
Just visit this page on your iphone 3g or 3gs
Select
mobileconfigs
USA
AT&T
INSTALL
once profile installs
go to
Settings>general>network>Internet thethering>on and pick USB only or USB+BLUEtooth
Plug into computer and BOOM
115ping 3.2MBPS
http://help.benm.at
Just visit this page on your iphone 3g or 3gs
Select
mobileconfigs
USA
AT&T
INSTALL
once profile installs
go to
Settings>general>network>Internet thethering>on and pick USB only or USB+BLUEtooth
Plug into computer and BOOM
115ping 3.2MBPS