If the Wi-Fi settings screen on your Android phone or tablet says there’s been an authentication problem, you won’t be able to reach the internet properly. Below are several things you can try to fix the issue and get back online.

Here’s a comprehensive guide to troubleshooting Wi-Fi authentication problems on your Android phone:

1. Basic Fixes:

• Restart your phone: A simple restart can often resolve temporary glitches.

• Restart your router: Turn off your router, wait 30 seconds, and turn it back on. This resets the router’s connection and can resolve issues.

• Forget and reconnect to the Wi-Fi network:

  1. Go to Settings > Wi-Fi.

  2. Long-press the problematic Wi-Fi network.

  3. Tap “Forget network.”

  4. Reconnect to the network and enter the password again.

2. Check Network Settings:

• Verify the Wi-Fi password: Double-check that you are entering the correct password. 

• Check for hidden characters: Make sure there are no hidden characters (like spaces) in the password.

• Ensure the network is secure: The Wi-Fi network should use WPA2 or WPA3 security for the strongest protection.

3. Update Software:

• Update your Android version: Out-of-date software can cause compatibility issues.

• Update your router’s firmware: Check your router’s manufacturer website for firmware updates.

4. Check for Router Issues:

• Network congestion: Too many devices connected to the router can cause slow speeds or authentication problems. Try disconnecting other devices temporarily to see if it helps.

• Router settings: Some routers have specific settings that can affect Wi-Fi connectivity. Check your router’s manual or website for troubleshooting tips.

5. Troubleshooting Wi-Fi Connection Settings:

• Disable MAC address filtering: If your router has MAC address filtering enabled, it may be blocking your phone’s access. Disable it in your router’s settings.

• Change Wi-Fi channel: Try changing the Wi-Fi channel on your router to reduce interference.

6. Other Possible Causes and Solutions:

• VPN or proxy settings: If you are using a VPN or proxy server, it may interfere with your Wi-Fi connection. Temporarily disable them to see if it resolves the issue.

• Network interference: Other devices or appliances in your home (like microwaves or cordless phones) can interfere with your Wi-Fi signal. Try moving your phone or router to a different location.

• Physical damage: If your phone has been dropped or damaged, the Wi-Fi antenna may be affected. Contact your carrier or a repair shop for assistance.

7. Contact Your Carrier or Router Manufacturer:

• If none of these solutions work, contact your carrier or router manufacturer for further assistance. 

Remember to be patient and try each step one at a time. Sometimes, simply restarting your phone or router can fix the problem.