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For more information on downloading Duo to your phone, check out our guide: how to install APK files. The ability to block numbers is also provided, along with a list that makes it easy to manage them. The application has a very handy feature called “Knock, knock” that lets that user that’s being contacted to see who’s calling before picking up. Also, the app can only be used from a phone that has a sim card or a phone number attached to it.
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Google Duo can be used both on mobile data connections and Wi-fi, but the latter is recommended since it involves quite a bit of traffic. Thanks to its easy-to-use interface and featuring everything you need to call your friends and family for free, Google Duo is still a very reliable communication application. The app uses only the frontal camera for calling, and you can only use the contacts in your address book. Google Duo is the well-known cross-platform audio and video call app that was originally an alternative to FaceTime. Usually, apps that give users the option of making video calls are also providing a host of numerous other functions as well, but Google Duo is different in this regard.