I believe part of the 5g rollout is to support voice calls over internet/wifi on phones, text so far isn't a thing as far as I can tell.
But there are a LOT of alternatives to that. Telegram is what most of my friends and I use.
It's like the digital changeover on TV. if your in the fringes, you could be just SOL I guess.
Though around my area there have been a LOT of new smaller towers erected.
Coverage has only improved, I even seem to have 5g if I step outside but 4g inside so I am guessing the 5g here is on a very high band.
I have noticed a lot though I will have good signals in areas with voice but no data network services, even after a reboot and such.
One of these places is at my daughters house. It's consistently like that so its not like a transient problem.
We live quite a long way out in the boonies but have a unique situation where we are situated on a massive corridor of services that transverses not just this state, but several in the region. Power, internet and all forms of transport converge here.
We might not be a small out of the way place in the sticks long though, the last two years people have been fleeing big cities, and word of this area has gotten out.
Everyone wants to come here because its NOT a big city, nobody is enforcing the commandants of the dictators, and we have some of the fastest internet in the world. Kinda sucks actually. I really don't want this city to get larger and bring with it all the bad things that entails.
But its almost always about money, returns, and political will so who knows.
I guess we will just have to wait and see where it goes.