Huawei P8 lite 2017

Find "Carrier"

Press Settings.

Find "Carrier"

Press More.

Find "Carrier"

Press Mobile network.

Find "Carrier"

Press Carrier.

Select network automatically

If you want to select a network automatically, press Choose automatically to turn on the function.

Select network manually

If you want to select a network manually, press Choose automatically to turn off the function.

Select network manually

Press OK.

Select network manually

Press the required network.

Return to the home screen

Press the Home key to return to the home screen.