Google Duo's voice calls are now available worldwide via @jjvincent | iGeneration - Humane Use of Technology in an AI world (Pedagogy & Digital Innovation) | Scoop.it
From www.theverge.com - April 10, 2017 9:13 AM
Google Duo, the search giant’s video chat app, now supports voice calls worldwide. The feature was made available in Brazil only last month, but can now be accessed anywhere in the world