These buttons include a button to change audio source, a button to toggle between your front and rear-facing cameras, a mute button, a button/round thumbnail of your camera view (which you can tap to enlarge and thus minimise your friend's camera view to the round thumbnail), and an end call button. When you or your friend end a call, you will be brought back to the camera view/video call button screen, where you'll then see buttons for your recent and frequent contacts next to and below the video call button. Here's what Google has to say: We’ve built Duo to be fast and reliable, so that video calls connect quickly and work well even on slower networks.Keep in mind if you don't have someone in your contacts, the quick-hit buttons for your recent and frequent contacts will simply show their phone numbers, and tapping any of these number buttons will prompt you to either add the number to your contacts, start a video call, remove it from this list, or block the number. According to a tweet from Google exec Amit Fulay, Duo was updated in March 2017 so that users can use the app to place voice calls. The app lets you reach people in your phone’s contacts list. Call quality adjusts to changing network conditions to keep you connected - when bandwidth is limited, Duo will gracefully reduce the resolution to keep the call going smoothly.Manage preferences While on the app's main interface (the camera view/video call button screen), tap the three-vertical-dots button in the upper right-hand corner. Duo has a feature called Knock Knock that lets you see live video of your caller before you answer. The voice-calling feature is available to Duo users worldwide. For video calls on the go, Duo will switch between Wi-Fi and cellular data automatically without dropping your call.You'll then see options to go to Settings, Help, and Feedback. Under this menu, there are several settings you can change, including the ability to turn off Knock Knock. You can disable this feature under the Settings menu within the app (see 'Manage preferences' above). You can start your call at home, and continue seamlessly even when you head out the door.
When you first see this screen, you'll be asked to give Duo access to your contacts.
Google is going after Face Time and Whats App and other video-calling apps with its own solution called Duo.
Duo is free to use and enables 1-to-1 video and voice calls.
Not the sort of bloke you expect to see in a pay-per-minute sex show.
“It’s really shocking to see how far he’s fallen and that he’s resorting to this to make money.