Simple put: you are wrong.

The course agreement for most universities attributes the copyright from any works you create during your studies to the unversity. They own it.

Actually, first hand experience of making calls over 3G (HSDPA) packet data connections using Fring on Three shows that call quality is terrible. Admittedly this was in central London, where cells may be quite heavily contended, but once people actually start using 3G you can quite regularly see bursts of latency - causing the throughput to go through the floor.

You get a guaranteed QoS with a proper voice call. You do not with packet data. In fact, Three's own "Skype" service is based on iSkoot, which does uses packet data for getting the contact list, setting up a call etc - but it actually carries calls over a proper voice channel.