Dial in via Treo 650 and bluetooth

1. Open "device manager"
2. Open properties pages of Bluetooth DUN Modem
3. Add the following extra init commands: AT+CGDCONT=1,"IPV4","CMNET",,0,0
4. Create a dial up connection using this modem
5. Dial number: "*99***1#"
6. Empty username/password

Tested over China Mobile.