The Microsoft Health app for Windows Phone lets you change the wallpaper and theme color on your Microsoft Band, but you have limited choices. There are only 12 wallpapers and 13 theme colors. If you want more choices, there are third-party apps that can help. A new app that we like is Awesome Band Backgrounds. It includes several photos and you can crop them to your preference. Best of all, it’s free. Watch our hands-on video to see it in action.