Odd.
When on WiFi and sending a text or MMS message, are you not docked messages against your account?
I would think the VOICE part of the call is still routed through cellular towers and the video is what is put through WiFi somehow?
Yet to see exactly how it is utilized....
Not really the same, as text and MMS are not sent as data, they're sent over the regular 2G network. I would seriously doubt that video and audio are not sent over the same medium! What if one went down? No way would video go over the internet and voice through the cell towers.