Apple quietly turned the back of the iPhone into a programmable control surface, then hid it in a settings menu most people ...
This iPhone button gives you instant access to Siri, screenshots, Control Center, and more.
The feature is called Back Tap and, like the Action Button on newer iPhones, it gives you one more way to use your device ...
Your smartphone’s power button hides powerful shortcuts for camera, flashlight, emergency SOS, screenshots, and more.