Zello is a free push-to-talk application for smartphones and PCs. It's lightweight, easy to use and extremely fast. Better yet, it's free and will remain free for personal use. 10 million. That's how many times users have downloaded Zello. Try it on your Android, BlackBerry, iPhone, PC or a mix!
All version compatible to download,more information visit homepage zello >>> http://zello.com/app.htm