Preview video calls with Knock Knock

When you call someone using Duo, the other person can see live video of you while their device rings if they have you as a contact. You won't be able to see the person you're calling until they answer.

You’ll also only see video from callers you have as contacts.

Turn on Knock Knock

  1. On your Android phone or tablet, open Duo.
  2. In the top right corner, tap More More and then Settings and then Knock Knock.
  3. Turn on Knock Knock.

Can't see video preview for incoming call

If you can't see a video preview when someone calls you, the other caller has Knock Knock turned off or they're not in your contacts.

Was this article helpful?
How can we improve it?