Not happening in India. To be realistic, even such a thing as a Whatsapp "ban" isn't going to happen/work. It will be at most similar to how porn is "banned". My ISP returns DNS not resolved for most porn websites if you use their resolver, but they pushed an update to the router changing the DNS to 8.8.8.8. The final result is most people haven't even realized that porn websites are banned.
Porn is effectively not banned because even the NIC DNS servers (the one's one whose infrastructure the government runs on) resolve them really fine for me.