Preview video calls with Knock Knock
When you call someone using Duo, the other person can see live video of you while the phone 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 has contacts.
To turn Knock Knock on
- Open Duo.
- In the top right corner, tap More Settings Knock Knock.
- Switch Knock Knock to On . Or tap again to turn off.
Can't see video preview for incoming call
If you can't see a video preview when a contact calls you and you have Knock Knock turned on, the other caller has Knock Knock turned off or they're not in your contacts.
Note: If you’re on an iPhone, you’ll need to see the video preview through the call notification. When you get the notification for an incoming call:
- If your phone is locked: Swipe left on the notification and tap Preview.
- If your phone is unlocked: Swipe down on the notification and tap Preview.