What about 5G Calling?

At the time of writing, 5G isn’t used for calls, just as 4G didn’t used to be (and still isn’t in some cases).

We’d imagine that eventually call support will be added to the UK’s 5G networks, especially as it is a use case that has been explored during the development of 5G, but there’s no current indication of when that will happen – right now the focus of networks is understandably on increasing 5G coverage.