I have little to no knowledge of networks and VIOP but i have been able to phone friends on skype free using a VNC connection to my laptop, the only issue is sound?

Can sound be sent over a vnc network if so then if we can send it both ways then we can have free skype on any iphone, no need to create apps as there would be no limitation, the only issue is that you would need a sms to tell you to login to your computer, be least thats free,

Any ideas on its pluasability?