How to Turn Off your iPhone without Using Power Button (iOS 13.3)?
Step 1: Open 'Settings' App.
Step 2: Tap on 'General,' and then scroll down at the very bottom.
Step 3: Tap on 'Shut Down' link.
Step 4: Now, Slide the 'ShutDown' button to the right in order to Power Off your iPhone.
It's done.
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