Using Mobile Phones Handsets for VoIP and the Security Implication

Mobile phones getting smarter every day and they derive from the main function as a phone device but one thing which added to them as improvement in the technology of voice is sending voice using wireless network and through the Internet -VoIP, another impotent aspect is how secure is the service, through-out the project topics of the technology and the structure of VoIP will be covered and the ways of connecting to the different networks using many smart mobile phone devices.