Turn off WiFi on T-Mobile Home Gateway

I'm curious whether other people can replicate this, but it's true that if you disable the "Enable SSID" setting, the SSID will not be visible on the list of available WiFi networks, but at least on my unit the WiFi signal and the ability to connect to the gateway by WiFi is still there, even after rebooting the gateway with the new settings. I was able to login by manually adding the gateway SSID and password when connecting a device to WiFi.  I'd be curious to know if others see the same thing, and if so, whether anyone knows if there's a way to truly shut off the gateway's WiFi.