Smile Hide WhatsApp Last Seen Officially

Now It is possible to hide whats app last seen officially on android

no need to download any apps other that original whatsapp

Steps:-
1.Go to www.whatsapp.com/android to download latest whatsapp or download latest version from google play
2.Open whatsapp go to settings
3.then go to account
4.then go to privacy
5.and done hide last seen from there