LG G Flex 21 730x434 LGs future key devices will have a nifty Knock feature to activate the display with a double tapWhen Korean firm LG introduced its LG G2 smartphone with buttons on the back, it also rolled out a nifty feature known as Knock, which lets you simply tap twice on the screen to switch your display on and off, instead of having to press a button.

The company announced today that the Knock feature will be made a standard in all its future key mobile devices, while its L Series smartphones will get the feature via a global upgrade starting in January. 

LG Mobile President and CEO Jong-seok Park notes: “No one ever thought that a power button needed to be improved until our engineers wondered why they couldn’t turn the entire screen into a power button.”

Thumbnail image via David Becker/Getty Images, image via LG