To turn on an Android phone without Power button, put the phone in fastbooot mode using Volume Up+Volume Down and connect the phone to a computer.

Quick Answer: To restart your iPhone without the power button, go to Settings > General > Shut Down, then slide to power off. You can also ask Siri to restart your iPhone without the button.

Google Pixel and Samsung phones have taken over power menus by forcing Assistant and Bixby on you. You can change them back to power menus.

Apple's upcoming iPhone 15 Pro and iPhone 15 Pro Max models will introduce a new button press combination to power off and force restart the ...