Mobile Dialer similar to Fring

Hi All, We are looking for someone to develope SIP based Mobile Dialer, which essentially should work on both, Symbian and Windows mobiles, similar to fring. Below are some of the features that it should support. 1) User friendly interface 2) Mobile Dialer supports SIP/IAX for signalling. 3) Mobile Dialer supports G729, G723.1,GSM and G.711 codec. 4) It needs to display account balance by http query from the server(GET Method). 5) It should notify if it gets unregistered from server due to connectivity. 6) Mobile Dialer runs on application layer so it supports GPRS, WiFi,3G network and Bluetooth for internet connectivity. 7) This software will run on the phone having Symbian or Windows Mobile 5 and 6. 8) Mobile Dialer is fully customizable. 9) Able to use Mobile Dialer with any kind of Soft switch which support SIP We have a decent budget for it and it well might be a very good opportunity for anyone who is interested. Regards Faizal Hamid [Posting of Contact Information is Prohibited - GAF Admin]