iOS 12 beta 5 confirms HomePod will add support for making phone calls

Rambo writing for 9to5Mac:

On the same screen, it describes some of the personal requests you can make to HomePod: “…add reminders, create notes, make phone calls, and more”.

Since there’s no developer or public beta for HomePod, we can’t actually test the feature until the final release, but this is a very solid indication that this feature is definitely coming for HomePod with iOS 12.