How to solve WiFi problem

Forget some network, scan and find it again.
Then connect with it, key in the correct password again.

 

How to troubleshoot Android Wi-Fi connection problems

1. Step 1: Verify AP and router settings.
2. Step 2: Verify wireless adapter.
3. Step 3: Check SSID and IP address.
4. Step 4: Verify network connection with Ping.
5. Step 5: Wireless-specific connection problems.
6. Step 6: Check security settings.
7. Step 7: Check RADIUS settings.
8. Step 8: Check 802.1X EAP issues.
9. Step 9: Check for intermittent network connections.

Hope this helps you!