This mod cannot enable server-side features. That means no offline downloads (saving music to your phone) and no very high quality streaming via the actual Spotify servers—the app may say it’s streaming at 320kbps, but your actual bitrate depends on server routing.
If you were to install this mod, the typical process would be: Spotify Mod Apk Version 8.9.8.545
If you want the features of Spotify Premium without the risks of version 8.9.8.545, consider these options: This mod cannot enable server-side features