This is not a tutorial, but a quick tip for you guys who stays in countries which doesn't have Spotify support.
I have seen a lot of tutorials on installing Country Restricted Apps on Android, which include rooting and most need external apps. But for Spotify App we don't have to root or install country faking Apps. All we you have to do is visit m.spotify.com from your phone browser. Manually download the application and install. It's simple as that. Enjoy.