The feature is called Back Tap and, like the Action Button on newer iPhones, it gives you one more way to use your device ...

Since iOS 14, Back Tap has allowed iPhone users to tap the back of their smartphones to quickly perform a simple action. Android phones have a similar feature that's relatively easy to set up and use, ...

Back-Tap lets you set separate actions for double and triple taps. You can also adjust the sensitivity and set when the feature should be paused. You'll be able to set gestures to take (and share) a ...