Hello Friends I have been using this app since inception, and I must say that it has revolutionised the whole world and changed the way we use to communicate before whatsapp. I have stop using the sms facility provided by vodafone as its not only less userfriendly but have to pay for it as well. As you all know whatsapp is absolutly free and easy to use. Post ita acquasition by facebook it has been updated and is all the more loaded woth features like Video calling, Voice calling, Sharing Photos/Videos/document etc and also if it is difficult for elderly people or kids to type we can send voice message as well. Its also usefull in terms of staying in touch with your loved ones by sharing your exact location realtime. I think its a wonderfull concept and best inovation in the mobile app industry