Messenger service WhatsApp has leapfrogged Facebook to become the leading mobile social messaging service.According to the results of a survey of nearly 4,000 smartphone users in five countries, 44 per cent used WhatsApp at least once a week, compared to 35 per cent using Facebook messenger.
www.thedrum.com/news/2013/11/30/whatsapp-leapfrogs-facebook-most-popular-mobile-messaging-service