Of the two communication apps that Google announced at I/O, Duo surely seemed like the less interesting one.
Video calls have been done again and again, and by now, if you have someone you want to talk to and see at the same time, odds are you already have your preferred way of doing that.
Thankfully, Knock Knock doesn't work for contacts you don't have in your address book - a nice way to avoid unsolicited images from people you don't know.
And it can also be disabled, but keep in mind that if you turn it off, you won't send your stream to your contacts but you also won't get theirs when they call, regardless of whether or not they have it enabled or disabled.
How can Duo be so good when most of what you're seeing are pixelated images?
Not because I to see them while I chat with them, but because the simplicity is there and it's enough to make me think twice before opening either app.If you're on the receiving end of a Duo call, you'll see the recipient before picking up if you both have Knock Knock enabled, and Duo will also show you which network it's currently using for its call.If you fail to answer, a missed call notification will appear on your phone and let you either call back or message (SMS) the person back.See, I'm residing in my mountain house now, where reception is beyond terrible: even Whats App text messages take more than 10 seconds to deliver sometimes.The Wi Fi connection you see my phone using here is a Mi Fi router, so it suffers from the same piss-poor reception as my HSDPA signal, which you may have seen revert back to Edge sometimes.
Once you've installed the app, all you have to do is agree to a couple of permission requests if you're running Android 6.0 Marshmallow or above, then type your phone number. Once the code is there, you're inside and looking at your own sexy (or not) face through the front camera window.