Enable "Unknown Sources" in your device's security settings.
If you are looking at community-driven projects that focus on patching the app rather than downloading random files, these are the current popular methods: spotify-premium-apk-mod-unlocked-v8-7-88-496-download
: Modded APKs can contain malware or spyware that steals personal data and financial information. Enable "Unknown Sources" in your device's security settings