"couldn't add fingerprint, try again"
If you are getting the error message "couldn't add fingerprint, try again" while trying to add your fingerprint on your Poco F3, there are a few things you can try to resolve the issue.
1. Check if the fingerprint sensor is clean and free from any dirt or grime. If the sensor is dirty or obstructed, it may not be able to read your fingerprint properly.
2. Make sure that your finger is positioned properly on the fingerprint sensor. The sensor should be able to read your entire fingerprint, so make sure your finger is centered on the sensor and covers the entire surface area.
3. Restart your phone and try adding your fingerprint again. Sometimes, software glitches can cause issues with the fingerprint sensor, and restarting your phone can help resolve these issues.
4. Try adding a different finger. Sometimes, the fingerprint sensor may have difficulty reading a particular finger due to the texture of the skin or other factors. Try adding a different finger, or try adding the same finger at a slightly different angle.
5. If none of these steps work, you can try clearing the cache of the Security app by going to Settings > Apps > Security > Storage > Clear cache. If this still doesn't work, you may need to perform a factory reset on your phone to resolve the issue. However, keep in mind that a factory reset will erase all data on your phone, so make sure to back up your important files before proceeding.
6. If the issue persists, it may be due to a hardware issue with the fingerprint sensor. In that case, it's recommended to bring your phone to an authorized service center for repair or replacement.