Literally most countries in the world: http://www.techtimes.com/articles/160897/20160525/top-messaging-apps-for-android-whatsapp-most-popular-in-109-countries-b

Literally most countries in the world: http://www.techtimes.com/articles/160897/20160525/top-messaging-apps-for-android-whatsapp-most-popular-in-109-countries-bbm-now-dominant-just-in-indonesia.htm http://www.techtimes.com/articles/160897/20160525/top-messag... Sure, I have messenger and hangouts and telegram as well, but WhatsApp is like a primary mode of communication.