This helps enable a particular shortcut once double or triple tap on the back of iPhone.
iPhone have gyroscope that detects whether the back of your phone is tapped or not. Based on the taps it performs the shortcut that is assigned.
In order for this feature to work you need to have the latest version of iOS. This feature works on iPhone 8 and later which comes with the glass back. It also works even if you have a case installed on your iPhone.
To enable this setting perform the following steps
1. Go to Settings
2. Select Accessibility
3. Go to Touch
4. Scroll at the bottom & select “Back Tap”
5. Select Tap Double Tap | Triple Tap to choose a shortcut
6. After setting this now you can Double or triple tap on iPhone to activate the shortcut that is selected
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