Welcome to Big Blu, a unique custom theme for the thematic substratum system. Using a black or transparent background and blue accents, Big Blu will transform your device and theme some of your favorite apps. Big Blu gives you the ability to choose from several buttons or no buttons at all, and they will show through the theme and through many themed apps.
Update If you encounter problems when updating Big Blu or any other substratum theme, Uninstall the theme and clear the cache and substrateum applications data. Give all permissions to the substratum application and reinstall the theme.
For More Info Google Play
varies with device