Why does the video footage have no sound? 1 Turn up your phone's volume. 2 Go to Device Settings – Privacy & Security, enable the Audio Recording. However, it only takes effects for new recordings. 3 If it is still not working, contact us via email@example.com. Related articles Why can't I hear sound from the device via the app? How to download and share my recordings? Motion Detection of Battery-Powered Devices User Manuals Where are my videos stored?