Huawei P20
Turning automatic use of mobile data on or off
You can set your phone to use mobile data automatically when the connection to the Wi-Fi network is weak. To turn automatic use of mobile data on or off, you need to turn on mobile data.
You can set your phone to use mobile data automatically when the connection to the Wi-Fi network is weak. To turn automatic use of mobile data on or off, you need to turn on mobile data.
Press Settings.
Press Wireless & networks.
Press Wi-Fi.
Press Wi-Fi+.
Press the indicator next to "Wi-Fi+" to turn the function on or off.
Press the Home key to return to the home screen.