There's also the fact that you would only make calls over speakerphone, which could limit the usefulness of the feature for some users. Theoretically, it would be easier for Google to get a phone service up and running on the Home, given that it's been operating Google Voice for seven years and launched Project Fi back in 2015, while Amazon has to start from scratch to get its phone service up and running. According to the Journal, Amazon is considering a number of different options, including syncing to the user's existing phone number, call forwarding, or the Echo getting its own phone number.