Experia 1 wifi calling on tmobile

[kamil607]

I have an Experia1 and I use it on 2 networks (2 SIM cards).

1. Tmobile (USA) - this is where I want my WiFi calling to work.

2. Plus GSM (Poland)

I can not seem to find ANY option to enable wifi calling. I do not see it in settings anywhere.

With Samsing that was quite straight forward. I am a new Sony phone user and that is quite disappointing. Please guide me thought the setup.

#experia1

[Yekollu]

Wifi calling has to be enabled by the operator and also the phone has to be supported by them

Did you check with your operator yet?

[kamil607]

I called Tmobile and they said on their end it is all looking good. 

They aslo asked me to enable this option in the ohone and the wifi calling does not even show up in the phone when I search for settings. Only internet WIFI options show up. 

[Strampke]

You did check this page I suppose?

What happens when you only insert the T Mobile SIM?