Originally Posted by Nathan

As far as I have tested on MVP, all VRS works fine expect sorenson since sorenson might have blocked from using their service on MVP or any other products. But I have tried call Sorenson vrs on my MVP, works great. I don't know what you are yanking about.

Here's what work on MVP so far:
Viable- viablevrs.tv
SnapVRS- call.snapvrs.tv
CSDVRS- csdvrs.tv
i711- i711.tv
Purple- hovrs.tv / spanish.hovrs.tv
SprintVRS- sprintvrs.tv
GraciaVRS- connect.graciavrs.tv
HolaVRS- holavrs.tv
SorensonVRS- svrs.tv

There are more VRS provider out there, go ahead can test them.

However this will not work on P3 since it's still in testing, only local number, IP address and toll free 866 will work on P3.