Navigate to the BASIC tab and select "Wireless."
In the Wireless Network (2.4GHz b/g/n) section, configure the Name (SSID) as <xxx>-2.4G, with "xxx" representing your Wi-Fi name. Save your settings.
In the Wireless Network (5GHz a/n/ac) section, set the Name (SSID) as <xxx>-5G, with "xxx" representing your Wi-Fi name. Save the changes.
Upon completion, the updated Wi-Fi names will be visible on your mobile phone's Wi-Fi settings page.
Note: Post name modifications, ensure reconnection of devices to this wireless router. The password remains the same if it hasn't been altered.