If someone you don't know is calling you, or a friend is calling from a new phone number, Knock Knock won't work. The same thing happens when you call someone. If your number isn't saved as a contact, Knock Knock is off by default.
With Duo, you can get closer to everyone you love with simple, high-quality video calling on iOS and Android. Google Duo is very easy to use and the set-up is simple. The first time you launch Duo, you're asked to enter your number. Google then sends you a text message containing a code to enter. Once you've verified your number, you're signed up and ready to start using Duo.
- Allow Duo to take pictures and video so that the app (and whoever calls you) can see you.
- Allow Duo to record audio so that the app (and whoever calls you) can hear you.
- Allow Duo to access your contacts so that it can see which of your contacts are on Google Duo and who you could invite to the service.
- Allow Duo to send and view text messages so that it can send invites to your contacts and so it can see the verification code you'll receive in a few steps.
To Make a Call With Duo
Google Duo Settings
- If you don't want the people you call to see you before they accept the call, you can slide the toggle for Knock Knock off.
- By default, the setting to limit mobile data usage is on, knocking down the video quality when you're away from Wi-Fi, so if you want full video quality this is where you can enable it.