Why wont my iPhone connect to the iPhone server?

I have a iPhone that is connected to my home wifi router.

I also have a router from t-mobile with the same SSID name. My iphone will not connect to the router from t-mobile. I can connect to the home wifi and the iPad. I am confused why the iphone is not connecting to the t-mobile router? I have tried to connect to the t-mobile router and the iPad to no avail. Does anyone know what might be the issue?

Make sure the iPhone's Network preferences are set to use Mobile Data and not WiFi.e. From the iPhone, go to Settings > General > Network > Mobile Data > Tethering and check the "Allow Internet access when offline" box. Also make sure your iPhone isn't in Airplane mode.

Why does my phone say access denied on this server?

I'm using Google Authenticator for two-factor authentication and I keep getting this error: I have verified that the password I am entering is correct.

What might be causing this error? I do not have any other security apps running on my phone at the moment.

Turns out my phone was updating to a new version of the Google Authenticator app and I just had to go into the Google Play Store and update the app to the current version. Everything works fine now.