Typically the reason why the sound may be missing when people submit responses through a
phone (using a link, not the mobile app) is because they need to enable their browser to use the
To give Safari access to your microphone, you can simply go into your phone settings > Privacy > Microphone > switch Safari ON.
On your Android device, open the Chrome app. To the right of the address bar, tap More > Settings > Site Settings > Microphone. Tap to turn the microphone or camera on or off.
If you see Boast under Blocked, tap the site and then “Access your microphone” and then “Allow”.