Huawei P40 lite 5G
Android 10.0
1 Find "‹SIM› SMS centre"
Press the message icon.
Press the menu icon.
Press Settings.
Press Advanced.
Press ‹SIM› SMS centre.
2 Set the message centre number
Press arrow right.
Key in +447785016005 and press OK.
+447785016005
3 Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.