You can turn your mobile phones or tablets into a walkie talkie device almost instantly by using the android application Zello Walkie Talkie. The Zello Walkie talkie application features you to talk privately to your contacts and also allows you to join public channels so that you can take part in a hot debating session. Zello Walkie talkie application offers public and private channels for up to about 1000 users. The app works over WiFi, 2G, 3G or 4G mobile data networks. It shows you the voice history. The Zello Walkie talkie android application provides real-time streaming with a high quality voice which makes the app so unique.