Huawei provides several methods for updating their devices, though STB updates are frequently managed automatically by the service provider. : Navigate to Settings > About > System Update .
To fix persistent glitches before attempting a full firmware flash, perform a factory reset via the system settings or by entering Android Recovery Mode (holding the reset button while powering on).
Then copy to PC via adb pull .
: If you can access settings but the device is laggy, perform a factory reset via Settings > Device Preferences > Reset to clear damaged OS files.