Using IPTV Smarters Pro and your Xtream Codes login. About five minutes, no computer needed.
On your Fire TV home screen, open Search and type “IPTV Smarters Pro”. Select it and choose Get / Download to install.
Launch IPTV Smarters Pro and accept the terms of use when prompted.
On the login screen, choose “Login with Xtream Codes API”.
Type any name (e.g. “Pioneer IPTV”), then enter the Server URL, Username and Password from your welcome email.
Select Add User. The app checks your details and loads your channel list — the first load can take a minute.
Open Live TV, Movies or Series and press play. Your TV guide fills in automatically.
Re-check the Server URL, Username and Password for typos or stray spaces, and confirm your subscription is active. Copy-paste beats typing on a TV remote.
Close background apps and restart the device (Settings → My Fire TV → Restart). Move closer to the router, switch to 5 GHz, or use an Ethernet adapter.
Make sure your Fire TV software is up to date (Settings → My Fire TV → About → Check for Updates), then search again or add it from the Amazon Appstore in a browser.