Whatsapp is such a fantastic app, by this app we can send message to our contacts saved in mobile using internet. it creates a different whats app account and sends takes all mobile contacts in them. in a whats app message any type of photo, videos can be send with ease to the destination. the file should be less than fifty megabites of data. it is a wery good app aailable for windows, ios and android phone. I use it in my windows mobile.