Wifi calling is only Tmobile Firmware. Its not a hardware difference just a software difference.
Although Im not sure if wifi calling would work for someone on a different carrier tho
No it doesn't it constantly screams sim error when i have m...
Interesting. I am traveling soon and will possibly be using WiFi calling in Europe, but after scanning TMo's web page, it is hard to be sure exactly what the charges for using it over there. It used to be free (only minutes were counted).
? - WiFi calling on international phone - thought only worked on US TMo accounts ? I used it internationally, but am on US TMo.
International phone (I9505), living internationally, but still have us tmo account.