Used to be able to do this all the time. DUN on the PC, BT to the phone and connect to the Internet.

Not sure what I changed now but while the PC connects to the Phone okay using BT, DUN reports Registering Computer on the NEtwork, Authentication Successful and a the dialup connection shows the following properties

PPP adapter BluetoothConnection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : BluetoothConnection
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 10.180.165.72(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . : 0.0.0.0
   DNS Servers . . . . . . . . . . . : 202.73.206.16
                                       202.73.198.16
   NetBIOS over Tcpip. . . . . . . . : Enabled

Can't actually get access to the Internet. The only thing that looks wrong is the Default Gateway which should be populated with something. Under Advanced Settings for theTCP/IP connection I have set use default gateway on the remote network