The process for configuring your Blackberry as a bluetooth modem varies depending on your service provider. Assuming you are able to pair your device with your machine, here are the steps required to connect on the following networks:
T-Mobile – “Blackberry” at first menu @ (800) 937-8997
Username: [blank]
Password: [blank]
Number: *99#
Additional dialing commands: +CGDCONT=1,”IP”,”wap.voicestream.com”