Samsung Galaxy A42 5G
Android 10.0
1 Find "Message Centre"
Press the message icon.
Press the menu icon.
Press Settings.
Press More settings.
Press Text messages.
Press Message Centre.
2 Set the message centre number
Key in +447785016005 and press Set.
+447785016005
3 Return to the home screen
Press the Home key to return to the home screen.