I just spent a week out of the states and took my phone for the music more then anything else. Where I was staying had Wi-Fi, thus I knew I could stream music, but I really wanted the ability to make some calls back to the U.S. to check on our kids. First get a Google voice account if you don't have one. Then download Talkatone from the Play store. Easy setup and works like a champ. Even has it's own native dialer. I made calls every night with no issues and the app worked as advertised. I would also add that it's free!