High-Speed Internet Gateway does not work with some apps on T-mobile Home Wifi Internet

First thanks in your sincere efforts to help the original post? As that was who I was trying to help.

I can and do have all my wifi radios runs turned off in the Nokia Gray Tower. I dont know what photos you are showing me, maybe you have an older firmware?
The first photo you have posted is what my page looks like and programed exactly as written on page 27 of the manual that I posted a link too. 

I have the SSIDs and “Broadcast” turned off “Disabled” on all three radios. 2.5, low 5 and high 5.
I have a Motorola AC 2600n router connected via Ethernet to the Nokia Router/Modem and is where all my wireless devices connect through. 

There are no SSIDs showing up as an option for the Nokia Tower in my home. I can turn them on and off at will, in fact I used the quite capable built in Nokia router for a good week or two on the 2.5, low5 and high 5 then turned them off and use the Motorola Router exclusively now. 

Its all clear in the manual as well, page 27, disable SSID and Broadcast. 

I have no issues what so ever with any of my 28 wifi devices connecting, though no more then 18 are active at any one time as seen by the network. No issues with 5 Roku players, cellphones, 2 laptops, 2 desktops, wifi cameras, doorbell camera, network printers, ect, ect ,ect … 

My problem is with a defective Nokia Modem/Router that will not connect to a secondary cell connection. It did for a couple weeks, however was very unreliable for more the 24 hours, my speeds when the secondary connection drops goes from 100 Mbps to 20, sometimes much worse, sometimes up to 40. Very unstable and very frustrating as I know the 5g modem must be defective as it no longer works at all.

Lets face it, this modem/router was pushed out to the market place by Nokia way too soon. 

TMobile states firmware updates will be automatically pushed when available. The 2.5 and 5G wifi radios have nothing to do with updates. Only the cell signals are used for updates.