Follow This Steps :-
1) Download Whatslock Pro Application From Here.
2)Open App & Allow all permission ( Drawing over other apps) & (usage allow)
3)After then Select WhatsApp to Lock
4)Enable Fake WhatsApp Lock Screen
5)Create Password
6)Now Simply Open Your Original WhatsApp.
7)When you will open your WhatsApp then You can show fake WhatsApp home screen.
8) Tap 3 times on "create new chat"& Enter Your Password.
9) Now You can see your original WhatsApp.
You Are All Set !
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