Most common causes and fixes:

1. Wrong password — tap "Forgot Password" to reset. 2. Account locked after too many wrong password attempts — wait 30 minutes and try again. 3. Account banned — you will see a ban reason + expiry date on the login screen. If permanent, see "Can I appeal a ban?" 4. Phone/email not recognized — check you are using the same one you registered with. Spelling matters. 5. App outdated — update Fuvio from Play Store or App Store. Old versions sometimes break after server updates. 6. Server down — very rare. Check @Fuvio_Official on Twitter/Telegram for status updates. 7. Network — switch between Wi-Fi and mobile data, restart the app.

Still stuck? Submit feedback with "Cannot login" + your phone/email + a screenshot of the error.