Google has announced that its Home smart speaker can now make voice calls. Home users will be able to call anyone in their contacts or any business over Wi-Fi free of charge. To make a call, just use dry ”Hey Google" and the name of the caller. Google Home uses Google Contacts, so if you’re using a different service it won’t work. The feature is rolling out initially in the US and Canada. For now, the person on the other end of your call will see "Unknown" or "No caller ID," but Google says that will be fixed by the end of the year. If you're a Google Voice or Project Fi user, you can choose to display your cell number instead by going into the Assistant settings in the Google Home app. Google announced voice calling for Google Home at its I/O developer conference back in May.