The mobile phone with the global theme you made may not support it for some reasons. You can search and download the theme creation software through the computer, and then create the global theme according to the introduction.

1 Open the phone settings, find "Wallpaper and Lock Screen Magazine" and open it.

2 Select the created theme and confirm.

Note: The current global theme requires ColorOS 2.1 and above, and can only be used on mobile phones with a screen resolution greater than 720P.