372321 Mobile Dialer

I need a Mobile Dialer like itelbilling.com. check [[login to view URL]] for more details. I need the dialer not the all fuctionality like icon,header. 1. User friendly interface 2. Should Suports SIP for signalling. 3. Supports G729, GSM and G.711 codec for sending audio data. For details of codec support according to Phone Sets. 4. Mobile Dialer can run behind NAT or on private IP. 5. Mobile Dialer Express runs on application layer so it supports GPRS, WiFi and Bluetooth for internet connectivity. 6. This software will run on the phone having Symbian or Windows Mobile 5 and 6. 7. Mobile Dialer with any kind of Soft switch which support SIP 8. Dialer should be able to run behind NAT or on private IP 9. Dialer will show the remaining Balance. [login to view URL] will show the last call duration and the number. i need all the source code and the compiler information.