I downloaded this app called maaii on my phone a few weeks ago and was wondering if anyone else has used it before. It allows you to call and text for free to any other user, and you can also purchase minutes for a low cost to call any number in the world. Right now they're giving out 100 free minutes every week to all users. Really great app, great sound quality. Check it out here: http://www.maaii.com/en/download