Whatsapp is one of the by default app in everyones mobile. Here you can do everything, calling, messages, video calls etc. Recently whatsapp as launch new feature of Status for sharing pics and videos in common with our contacts. We have to first save the number of the person with whom you want to talk, then you can see his whatsapp pic and carry on chat with him. Whatsapp doesn’t consume more data. thats why its very useful.