Huawei Mate 8 - Manual (Page 174)

Power management
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Switch between the Installed apps and System apps tabs to configure the Internet
access permissions for individual apps. Touch to configure which apps have
Internet access while roaming.
If you disable Internet access for an app, you will be asked if you want to enable Internet
access next time you open it.
Configuring display and sound settings
You can save power by optimizing the display and sound settings on your phone.
Refer to Configuring the display settings to learn how to save power by disabling
Daydream, turning off the indicator light, and reducing the screen brightness and screen-
off time.
Refer to Sound settings to learn how to save power by disabling unnecessary sound or
vibration alerts.
Batch select Internet
access permissions
Select app type
Advanced Internet
access permissions