Instructions for use as bluetooth modem with tmobile
There are two pieces of information you really need: The "Phone number" and the modem initialization string.
Phone number: *99***2#
Initialization string: at+cgdcont=2,"IP","internet2.voicestream.com"
On my system (XP SP2), you get to the modem initialization string by:
Phone and Modem Options
[Select the bluetooth modem]