Home use is telecommunications, but also light cat, but should be similar, first of all, look at the bottom of the light cat routing address, mine is 192.168.1.1, with a computer or mobile phone connected (wired wireless).
Open the browser, address bar, enter the router address, administrator account password login.
Roughly the page is like this, select the WiFi Settings (different cats may be different, but the meaning is the same), and then you can turn off whatever you want.