mobile messaging service WhatsApp is down, Saturday, around the world. Unable to send or receive messages. And, just three days after being acquired by the social network Facebook, for the tidy sum of $ 19 billion, in action and in cash. On his twitter account, beset by customer complaints, WhatsApp has acknowledged this bug: “Sorry we currently have server problems. We hope that everything will go back soon. “Application could be a victim of its success since its spectacular redemption. The servers were not prepared for such an influx. By acquiring WhatsApp, Facebook had yet hope to double very quickly the number of users. They are currently in use 450 million worldwide.