Huawei Mate 9 - Manual (Page 177)

System Features and Settings
Power on and off timer
Use the power on and off timer to reduce power consumption and prevent disturbances when
you're asleep.
Touch Settings > Smart assistance > Scheduled power on/off. Switch on Scheduled power
off and Scheduled power on, and then configure the power on and off time and repeat settings.
Your phone will automatically turn on or off at the preset time.
To disable the timer, switch off Scheduled power off and Scheduled power on.
Restarting your phone
You may notice a drop in performance when your phone has been powered on for a long time.
Restart your phone regularly to clear cached files and ensure optimal performance.
To restart your phone, press and hold the power button for 3 seconds, and then touch Restart.
To force your phone to restart, press and hold the power button until your phone vibrates.
Changing the system language
You can change the system language at any time.
1
Open Settings.
2
Touch Advanced settings > Language & input.
3
Touch Language and select the desired language.
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