The procedure is pretty much the same as all other themes, where we download themes and then apply that theme. If you’re looking for a good theme for your Galaxy device, then make sure to check out list of best Samsung themes. The best thing is that, the theme will automatically change the wallpaper, icon style, default apps UI, lock screen, and a few other things. And Samsung offers a list of themes for the One UI, you can download from the Galaxy Store. If you’d like to customize your Galaxy phone’s look, then the easiest way to do is, downloading a theme from the built-in store. One of the best things about Samsung custom skin – One UI is, it has a bunch of customization options which allows you to change the UI according to your own need.