I have the plan option where calling into 30 or so countries is free. That includes Germany.
So, if I'm walking around in the US, on normal T-Mobile network (no wifi calling), it's free to call a German phone number.
Now, I would expect that if I'm still in the US, but on wifi-calling, and I'm calling that same German phone number, it's still free because of that international call plan. Please confirm.
If that's the case, I would also assume that when I'm in some other country, on a wifi and thus using wifi-calling, calls to the US AND to those 30 or so countries which are included in the international call plan (flatrate) are free because it shouldn't matter where the wifi is which is being used for wifi-calling. Is that correct?