Hi my self shubham kumar and I am using whatsapp more than 4 years . This application is very nice because I am chating with my friend and family and I am calling also audio calling and video calling. It’s a very secure application.the protional data and protional chat are not leaked. Maximum people are using in india I don’t know about other contry. I really love this application. And I listen after some days payment banking coming in this application. I think whatsapp is a great application for me. After some days I changed status and profile pic. This was my real story with whatsapp.