Click on this links
http://www.whatsapp.com/
http://www.whatsapp.com/download/
Google play
https://play.google.com/store/apps/details?id=com.whatsapp&hl=en
http://www.whatsapp.com/
http://www.whatsapp.com/download/
Google play
https://play.google.com/store/apps/details?id=com.whatsapp&hl=en