OK, so I downloaded the recently released IOS Remote App. All works as expected, except inconsistent Volume Control. I have two Vizio TVs in my house - E701i-A3 and M401i-A3 models. Volume Control via IOS app works perfectly on my E701i-A3 - pressing iPhone volume buttons triggers volume change on the soundbar attached to this set. No such luck with my M401i-A3 set - pressing iPhone volume buttons only triggers iPhone local ringer volume changes.. which tells me something isn't right with CEC audio control between ATV4 and the TV set. I don't use soundbar with this set - just internal TV speakers. Both sets are running the latest Vizio firmware, and CEC/audio is enabled. No issues controlling the volume or turning the sets on/off via hardware Siri remote. Sort of out of ideas here.. anyone has any thoughts as to what the issue might be with my Vizio M401i-A3 set? Has anyone gotten IOS Remote volume control working with other TV models?