Zello PTT Walkie Talkie - Always dreamed of privacy in conversations? Or have you always thought it would be cool to have a walkie-talkie? This app makes your smartphone a real radio with which you will be able to speak with people in real time, and only when holding the button. Besides, you can not only communicate with friends, you can go to the channels where we communicate with thousands of people from around the world. Make new friends without even seeing each other.