If you have a UTstarcom PPC-6700 phone, Engadget has a good walkthrough for configuring it to act as a modem for your laptop via USB or Bluetooth. While the instructions provided are for Verizon service, they worked just fine on my Alltel phone.
You will need the drivers from your phone’s CD to get this work. If you lost the CD, Google for Harrier USB software (or you can get it from here , but you’ll have to register). The Harrier software can act as a dialer for most CDMA devices.