How to Lock iPhone Without a Power Button

If your iPhone’s power button breaks, locking your phone's screen may become a frustrating waiting game. Locking your screen is an essential operation for the continued use of your iPhone, and you may worry that you need to replace the phone. Buy yourself time by using Apple's AssistiveTouch on-screen menu to lock the screen in seconds. This How.com.vn teaches you how to lock your iPhone's screen without using the power button.

Steps

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It's the gray gear icon on the home screen or in the app list.
It's in the third group of settings—look for the blue-and-white icon containing a circle with a person inside.
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It's in the second group of settings.
It's the first option.
As long as this switch is green, a gray circle will stay visible in the lower-right corner of your iPhone's screen.
It's the new gray circle near the bottom-right corner of the screen. You can use this button to access many of the iPhone's functions, including an option for locking your phone screen.
It's the phone-shaped icon on the right side. Another menu will expand.
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Tap Lock Screen. It's the padlock icon. This locks your screen immediately.
- If you need to restart your phone, tap the AssistiveTouch button, tap Device, select More, and then tap Restart.
- If you don't want to select Device before you can access the Lock Screen option, add Lock Screen to the top-level menu. To do this, return to Settings > Accessibility > Touch > AssistiveTouch, tap Customize Top Level Menu, select Custom, tap Lock Screen, and then tap Done.