Make free voice calls from Hangouts. Google Hangout is updating, from today you can make voice calls from Hangouts on Android, iOS and the web.
google-hangouts


Google announced through their official blog post says that “It’s free to call other Hangouts users, it’s free to call numbers in the U.S. and Canada, and the international rates are really low. So keeping in touch is easier and more affordable than ever.”

google-hangout-calling

How it will work?

Google employee Chee Chew explaining.

1. Calling. when you call someone from hangouts, it’ll now come from your google voice number. and when someone calls you, you can answer from hangouts too.

2. SMS. you can now send and receive your google voice sms messages from the hangouts app.

3. Voicemail. google voice voicemails can now appear in hangouts as part of your ongoing conversations. either read the transcriptions, or play them inline.
google-hangout-calling
These features will be activated a few days after we complete today’s rollout. so grab the new version of hangouts when it’s available, and install the accompanying dialer to turn on voice calls. ios only supports google voice calling for now, but sms and voicemail support are coming soon.

You need both the 2.3 update to Google Hangouts and the Hangouts Dialer app.