If IPTV Smarters Pro keeps looping on the login screen, showing “Invalid Details,” or loading forever, don’t panic — this is one of the most reported issues in late 2025.

The cause can range from cached credentials and incorrect API formatting to DNS resolution issues.

Let’s go through the verified fixes that get Smarters Pro running again on all devices.

1. Clear App Cache & Data

This alone fixes the issue for more than half of users.

Android TV / Firestick:

1. Go to Settings → Apps → IPTV Smarters Pro → Storage

2. Select Clear Cache and Clear Data

3. Restart your device

4. Reopen the app and re-enter your details

Clearing data forces Smarters Pro to rebuild configuration files — eliminating corrupt login loops.

2. Double-Check Login Details (and URL Format)

For most users, login errors happen because of simple mistakes in the portal URL or spelling.

Make sure you include the full API URL, usually something like:

http://yourprovider.com:port/

Then enter your username and password exactly as provided — no extra spaces or missing colons.

3. Change DNS or Connection

Smarters often fails to reach the login server due to slow or blocked DNS lookups.

Switching to a global DNS usually fixes the issue instantly.

Try one of these:

• Cloudflare: 1.1.1.1 / 1.0.0.1

• Google: 8.8.8.8 / 8.8.4.4

If possible, restart the app after applying DNS changes.

4. Update the App to the Latest Build

Several older Smarters Pro builds (especially versions 3.1.x–3.2.x) have broken authentication.

To fix:

1. Uninstall the current version

2. Reboot your device

3. Reinstall the latest APK from the official source or Play Store

4. Log in again using your portal details

If your provider requires a custom build, ask if a 2025-compatible APK is available.

5. Disable IPv6 on Router (Advanced)

IPv6 can cause authentication conflicts on certain ISPs.

If login errors persist only on home Wi-Fi:

• Log into your router

• Find Advanced → Network Settings

• Disable IPv6, leaving IPv4 active

• Save and restart both router and device

6. Try the Alternative Login Method

Smarters Pro supports Xtream Codes API, M3U URL, and Local File logins.

If one fails, test another:

1. From the login screen, choose “Login with M3U URL”

2. Paste the playlist link provided by your service

3. Wait for loading — if it works, your API login may be temporarily blocked

7. Check for Server Downtime

If your credentials are correct and DNS is working, the issue may be server-side.

Try logging in from another device or network. If it still fails, contact your provider to confirm whether the portal is under maintenance or migration.

Quick Recap

✅ Clear app data and cache
✅ Verify your full URL and credentials
✅ Change DNS to Cloudflare or Google
✅ Update to the latest Smarters Pro version
✅ Disable IPv6 if needed
✅ Try M3U or local login if API fails

Final Tip

Most login issues in IPTV Smarters Pro come down to DNS delays or outdated versions. Clearing data and changing DNS resolve over 80% of cases instantly.

If you still can’t log in, it’s usually a provider-side problem — not the app itself. Wait a few hours, retry, and your access should be restored.