Whatsapp is such an amazing app. Through this I can able to contact my friends through net connection. Once we recharge net, we can send unlimited message to our friends. We can create group in whatsapp so that we can go for a group chat., we can send vedios etc. We can send certain notes to group so that everyone can see that. Download option is also optional. If we don't want to download they can neglect it from downloading.very interesting app. If we don't want to see anyones chat. We can block that person. That option is also available. Altogether it's a good app. I love it.