First Method:

1. First install the latest nokia pc suite.
2. Make sure your phone is connected to the computer via cable or bluetooth.
3. click the connect to internet icon.
4. Go into configure.
5. Click next and then specify you want to set up the connection manually.
6. As the access point, put telstra.internet if your using just normal pay as you go internet or telstra.datapack if you are using a datapack.
7. Leave all the other fields blank, click the tick and connect!

2nd Method:

1. Create a dialup account in windows and setup the nokia phone as a modem, just dial “*99#” and your away.

I prefer the first method as i already have nokia pc suite installed, if you don’t you probably should try method 2