Mobile VOIP Dialer

I would like to have a Mobile Voip App that would be compatible with all the mobile operating systems like Nokia, IPhone, Windows Mobile and Blackberry. The below features & specification has to be included : - Dialer for phone sets from Nokia with Symbian OS of S60 2nd & 3rd Edition, Blackberry, IPhone (IOS), Windows 7 (mobile), Android and Facebook app. - Supports SIP for signaling. - Supports G729 and G.711 (ulaw) Codec. - Can run behind NAT / private IP. - A tunneling system thru which the dialer can work in areas where SIP ports are blocked. - Able to use the dialer with any kind of Soft switch which support SIP such as Asterisk, VoipSwitch and etc. - Can support two stage billing so call timer will start from Invite Ring 200 OK - Supports GPRS, WiFi,3G network and Bluetooth for internet connectivity. - SIP protocol support - Unlimited user license - Customized with company logo/name - Making and receiving calls - Call timer - Calling in background - Display Balance - Display Call history - Display Credit Time - Use of existing Phone address book - Touch Tone - Silence Suppression - Echo Cancellation - Registration Timeout - Local signaling (Dial tone, busy, ring back, etc.) - Redial - Speaker - Mute