T-Mobile Home Internet Account Constantly Disconnects

I have the iPhone 12 Pro and I see the same behavior. The phone IS connected to the wireless network but the useless application wants to get connected. I have tried multiple options to try to overcome the problem over the past couple of years. The one that seems to have some success is when the mobile application presents that overlay screen I leave the application open but I toggle off the wireless for say 15-20 seconds, it varies as I don’t count or anything, and then toggle the wireless radio on the phone back on. Sometimes that works and the application will present the login screen for the admin account access. The application is pretty unpredictable. Arcadyan and Sagemcon gateway users are stuck with using that mobile application due to T-Mobile crippling the web GUI access. I firmly believe it is about penny pinching as they don’t want to maintain both the mobile application and a web driven interface. When the Arcadyan released on the first firmware release it DID have the web GUI interface. After the upgrade was pushed out that was gone. So much for functionality.