I flew my mavic yesterday I have flown it about 35 times already. Yesterday for some reason I was not getting any sound from my controller. I taught when I updated firmware something happened, I check all menus on controller and couldn't find anything on volume control. I know the controller has a speaker on it I can hear it when controller starts up. But I would not get any sound when flying i was getting frustrated because I like the sound. I took my phone out and realized my volume on phone was off turn it up and decided to try and fly again and I had my sound back. At least on my controller it works this way and with galaxy note 5 attached to it.