Mute Incoming Calls by Flipping Your Android Device
Android smartphones have a gesture that allows you to mute the ringing of a call by flipping over your device. The feature is called “Flip to Silence” and it only mutes incoming calls. With this feature enabled, you can silence an incoming call by placing your phone face down on a flat surface.
How To Turn on or turn off Flip To Silence Feature on Phone
Open the “Contact” app and tap the three-dot menu icon in the top right. And Tap on Settings.
Now, click “Flip to silence” option.
Finally, turn on “Flip to silence” option.