Apple iPhone 8
Select network
You can set your phone to select a network automatically or you can select a network manually. If you select a network manually, your phone will lose network connection when the selected network is out of reach.
Press Settings.
Press Mobile Data.
Press Network Selection.
Press the indicator next to "Automatic" to turn automatic network selection on or off.
If you turn off the function, press the required network.
Press the Home key to return to the home screen.
1. 1. Find "Network Selection"
2. 2. Select network
3. 3. Return to the home screen