Most Android smartphones and tablets share a few common features, and hardware Power and Volume buttons fall into this category. Let’s see how they can be useful beyond their most obvious features:
1. To ignore unwanted calls: if you can’t or don’t want to receive a certain incoming call, you don’t have to wait for your phone to stop ringing. Unmute the call immediately by fully pressing the decrease button volume .
2. To print the active screen: Want to take a screenshot of your phone’s current screen to share with someone? It’s easy to do. Keep that particular screen in the foreground and press the buttons at the same time Power+Volume Down . You will find the screenshot saved in the Screenshots section of the gallery.
Note that if you press the power or volume down button too soon, you will end up turning off the display or turning down the ringer volume.