nostr:npub178rvtslm3qykq8uy5afswta2qz5pk9atjxsepht4x8ldddssp6kq4sqekt
Those don't keep a bare minimum cellular connection open?

Glad I disabled it. So many things can silently go wrong and you'd have no idea you've missed a call and based on what you've said it sounds like the network wouldn't "realize" it and fall back to that standard cellular connection.