General recommendation: for all functionalities to work correctly on a mobile device, it is recommended that the system software (Android, Windows Mobile, or iOS) on the mobile device is updated to the latest version.
Further troubleshooting steps:
- Check whether airplane mode is turned off on the device. If it is on, turn it off.
- Check whether any software is installed on the device that could affect the default Wi-Fi client (such as alternative Wi-Fi clients, VPN clients, etc.). If so, disable or remove it.
- Verify the correctness of the entered user credentials for the wireless network you wish to connect to.
- Reset or restart the device.
- Select the “Forget (desired) network” option (e.g. Eduroam) and re-enter the credentials (step 3).
- Check the obtained network parameters (IP address, default gateway, etc.) if a connection to the wireless network has already been established.
How do we check Wi-Fi operation?
- Check connectivity (by browsing the web, checking the responsiveness of a server/website (PING)).
- You can also check an established connection by testing its speed using online tools (e.g. http://speedtest.net).
You will find it easier to resolve the issue if you pay attention to error messages when establishing a network connection (e.g. “Authentication failure”) and to unusual symbols (e.g. an exclamation mark on the connection status) displayed by your device. Sources:
- http://www.smartmobilephonesolutions.com/content/cant-connect-to-wifi-on-android-smartphone
- https://www.cnet.com/how-to/common-wi-fi-problems-and-how-to-fix-them/
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