Apple iPhone 8
Turn Wi-Fi Assist 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 Wi-Fi Assist on or off, you need to turn on mobile data.
Press Settings.
Press Mobile Data.
Press the indicator next to "Wi-Fi Assist" to turn the function on or off.
Press the Home key to return to the home screen.
1. 1. Find "Mobile Data"
2. 2. Turn Wi-Fi Assist on or off
3. 3. Return to the home screen