Google Home is now able to make phone calls, as long as you're in the US or Canada. This functionality was rumored for many months until it got official at Google I/O back in May, and now it's finally in the process of rolling out. There are, however, plenty of caveats, aside from the aforementioned geographical restriction. You can only call phone numbers from the US or Canada, but on the flip side your Google Home will be able to call any landline or mobile - as long as it has a phone number, you're good to go. That said, there's no support for incoming calls yet, so you can't...
Source: http://www.gsmarena.com/google_home_starts_making_phone_calls_in_the_us_and_canada-news-26790.php