Once, the power button on a smartphone turned the phone on and off, but an annoying trend is seeing the button repurposed for different duties.

Eventually, I discovered that I could double-press the power button to launch the camera on my Samsung phone. It also works on Google Pixel phones and other devices.

J7 Power Button Not Working After Software Update Problem: Since updating to the newest software update recently released the power button has ceased to close the screen or access the power menu.

iPhone or iPad lock/power button not working? It's a common problem, and even Apple has admitted it. Here's how to fix a broken iPhone lock button.