Yeah, the 5G debacle in this regard is disappointing. We just saw this mostly "settle out", for 4G/LTE, not so long ago. I guess I was thinking along those lines, instead of the fact some of the bandwidth is being repurposed, for 5G.
I'm glad I can use TMo in the US these days; it's decent where I'm at. They very rarely play these games around carrier-branded/iOS phones. I was with ATT for a long time, and picked my way around BYO, non-carrier devices for most of that, almost always frustrated about the insanity of it all, particularly the fact they try to brush it off as "technical reasons", because "business decisions" doesn't look very warm and friendly...