Open the phone's main menu and enter the phone setting options.
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Slide down the page, and click Select Healthy Use of Mobile Phone.
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Click the option below to turn off the healthy use of the mobile phone and continue the next operation.
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In the pop-up dialog box, click Select Close to close the corresponding service.
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Then, you can click the screen time off to remove the restrictions on the use time of the mobile phone.
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You can also click Select Available Duration-Add Available Duration to set more time periods for using the mobile phone.
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