A encrypted mobile application for VOIP - repost

Below are requirement and concept of software we are interested in launching. A end user mobile application with help of which Kuwait and UAE based client can make calls through internet. Specification Platform Support : Symbian and Android priority and IOS later on Encryption: Data needs to be compressed and encrypted as Middle east block IP calling. Application first connect to our server and then to client server so that same application can be sold to different ITSP ( Internet Telephony Service Provider) Application file size: Smaller the application better the performance in low end devices like e51 e71 galaxy y etc. Application can initiate call directly from dialer like skype. It should ask client while dialer if he want to place call on GSM or Internet. A sample application can be checked in play store Itel Mobile Dialer