This is regarding calling to a T-Mobile US number that is roaming internationally.
Let's say my family members are visiting Ireland, one of the Simple Global countries, and I am home in the US. We all have T-Mobile US numbers under the same Standard Simple Choice plan, no Stateside International Talk.
1- I call them from my Cell Phone over Cell Tower or VoLTE -- NO CHARGE
2- I call them using WiFi Calling -- NO CHARGE
3- They call me using WiFi Calling -- NO CHARGE
4- They call me using Roaming Partner's Cellular Network -- $0.20/min
Now the tweaks:
5- I call the hotel they are staying at, over WiFi or Cellular Network -- $1.99/min
6- They call the hotel they are staying at, over WiFi or Cellular Network -- $0.20/min
7- I call my Cousin in Australia -- $1.99/min
8- They call my cousin in Australia -- $0.20/min
(here it would make perfect sense to call my wife and tell her to call my cousin and tell him to call me back )
Maybe the industry needs to adopt reasonable rates for international calling. You can use a calling card and get a rate of 2 cents per minute to Ireland. I guess the industry is betting on times and places where calling cards and free wifi are out of reach!
Seriously, If T-Mobile offered 10 cents per minute, or something as reasonable!, flat int'l rate to Simple Choice customers, I bet that would add a positive number to their bottom line.
Surely, people don't like buying subscriptions (SIT) to pay lower rates on something they can easily get even lower rates without any subscriptions (Calling Cards, VoIPs, other ip based solutions).