How do I turn automatic sound for News Feed videos on Facebook on or off?

To turn automatic sound for News Feed videos on or off:
  1. Tap More in the top right of Facebook.
  2. Scroll down and tap Settings and Privacy > Settings > Media and Contacts.
  3. Tap or to turn Videos in News Feed Start With Sound on or off.
Keep in mind that you can also control the volume of the videos you see as you scroll in News Feed with the sound settings of your mobile device.
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