During two recent trips to Central and South America I needed a way to call back to the States without spending a lot of money. After a little research I found a competitive rate: free. Using an Android-powered smartphone it’s possible to make and receive calls free of charge from any Wi-Fi hotspot worldwide. In this post I’ll explain how to do this for US-based mobile devices.

Using an Android-powered smartphone it’s possible to make and receive calls free of charge from any Wi-Fi hotspot worldwide.