Here:
On the phone, Programs > More > More > Accessories > IRComm and Menu > Activate.
Align the infrared port with that on your PC, the PC should recognise the
connection as Standard modem over infrared. It will install the drivers
for
the device.
Once installed, go to Start > Control Panel > Phone and Modem Options.
Select Standard modem over infrared and click Properties. Go to the
advanced screen, and enter the following initialisation string:
+cgdcont=1,"IP","orangeinternet","",0,0
Then, go to Start > Control Panel > Network Connections > Create a new
connections.
Create a new connection, connect it through Standard modem over
infrared, and put the phone number in as "*99#".
Dial the number and bam!