An OBiWiFi module plugged into an OBi200 or OBi202 would probably work. I don't know how the quality would be. I suspect that if you could minimize others using the connection during calls, it would be good. A computer also using the connection might saturate the available bandwidth.
I don't think there is any way you will make direct USB work for your purpose, unless somebody makes a gadget that converts the VZ USB to Ethernet.