To change the name of your WiFi network, you’ll need to visit your router’s admin page.
Open your web browser and enter your router’s IP address.
Log in as the administrator.
In the settings look for “WiFi name” or “SSID” option.
There type in the new name for the network.
How can I do that in router’s page?
That is the name of your internet service provider. Look or ask for the site on where to change your setting or password.