PiPO M8 pro - Manual (Page 28)

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Mobile networks: Turn on ―Mobile Networks‖→ ―Data enabled‖
whether you use a 3G dongle or SIM card, it‘s required to turn on ―Data
enabled‖ for mobile data transmission .
Sound: turn off touch sound by tapping ―sound‖—―touch sounds‖
Display: To set Brightness, Wallpaper, Sleep time-out, Font size here.
Screenshot: Tap ―Screenshot‖, ticket the option ―show screenshot button on
the status bar‖. There will be a screenshot button on the bar.
Storage: Check internal storage here. If you insert a Micro SD card, or USB disk,
you can check the total and available space for your Micro SD card or USB disk.
Please unmount it to safely remove it.
Battery: Check the Battery status here.