"T-Mobile, for example, offers a Wi-Fi router that is designed to allow iPhone owners to place phone calls over a Wi-Fi connection. That helps offload some of the traffic that would have gone on T-Mobile’s voice network, but it also compensates for areas where T-Mobile has poor coverage."
The writer wrote the above last paragraph. His research was quite limited. T-Mobile offers this to all smart phones. WiFi calling is so that you can make calls inside a building or place where the cell-tower coverage may be weak or inadequate. T-mobile WiFi works all over the planet earth. I was in Moscow, Russia making calls from a McDonald's WiFi to phones in Russia and the United States. You can buy a cheap android phone for $35 NEW! and benefit from this. Compliment this with Google Voice and/or Hangouts and you have a killer phone for a monthly fee of starting at $30 for WiFi (international) and 5GB 4GLTE (US).
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"T-Mobile, for example, offers a Wi-Fi router that is designed to allow iPhone owners to place phone calls over a Wi-Fi connection. That helps offload some of the traffic that would have gone on T-Mobile’s voice network, but it also compensates for areas where T-Mobile has poor coverage." The writer wrote the above last paragraph. His research was quite limited. T-Mobile offers this to all smart phones. WiFi calling is so that you can make calls inside a building or place where the cell-tower coverage may be weak or inadequate. T-mobile WiFi works all over the planet earth. I was in Moscow, Russia making calls from a McDonald's WiFi to phones in Russia and the United States. You can buy a cheap android phone for $35 NEW! and benefit from this. Compliment this with Google Voice and/or Hangouts and you have a killer phone for a monthly fee of starting at $30 for WiFi (international) and 5GB 4GLTE (US).