In this demo, I show you how to transfer a call from your iPhone to the HomePod to then use the HomePod as a hands free speaker phone.

This works for both making and receiving a call.

When your on a call, choose the Hide button to hide the keypad, choose the Audio button, and then choose your HomePod.

The great thing about this for VoiceOver users is that the call is live on your HomePod, whilst VoiceOver and the keypad if you have to use it with automated system stays on the iPhone.  Consequently you have two different audio sources, making it much easier to either listen to the phone call or use your iPhone.