Log in to the web UI of the ONT, choose WLAN and repeat the following steps in wlan0 (5GHz) and wlan1 (2.4GHz):

• Wi-Fi name: Choose Basic Settings and change the SSID (Wi-Fi name). Click Apply Changes, and click OK when Change setting successfully is shown.
• Wi-Fi password: Choose Security, set Encryption to WPA/WPA2-PSK (recommended) and change the Pre-Shared Key (Wi-Fi password). Click Apply Changes, and click OK when Change setting successfully is shown.