After purchasing, you'll receive login credentials by email. Follow the guide for your device below — most people are watching their first channel within 5 minutes.
Settings → My Fire TV → Developer Options → Apps from Unknown Sources → Turn ON
Search "Downloader" in the Firestick app store and install the free app by AFTVnews.
Open Downloader, type in the IPTV Smarters Pro APK URL, download and install it.
Open IPTV Smarters → Add User → Xtream Codes → Enter your URL, username & password.