1. Check if the name of the Wi-Fi network (USSD) and password are correct.
2. Check if your W-Fi is properly TURNED ON (Go to MENU>SETTINGS>Wi-Fi)
3. If your Wi-Fi is OFF, please TURN IT ON, search for the name of the network that you want to connect to and select it. If the network is secured, it will ask for a WEP/WPA password. Input the password accordingly.