We're getting some no-video problems after the migration to Unified Plan
(before it was only working for same plan clients FWIW).
It was already disabled on Android, so the same in iOS while we figure
this out.
For some reason one of the users gets a black screen when doing Android
to Android calls. If iOS is involved things Just Work (TM).
It seems to be related to the use of H.264, but since it works with iOS
there must be something else to it.
