Facebook apologizes and acknowledges the incident on Twitter.
As predicted by Medium page, the reason why the Facebook system is malfunctioned may be because this social network tested the integration of Facebook, Messenger, Instagram and WhatsApp applications so that users can text messages.
Previously, Facebook also confirmed that Facebook, Instagram and WhatsApp crashed globally not because of DDoS attacks.
After a day of trouble, the recovery process is still incomplete, Facebook access is still fluttering in many areas including some South American countries, South England, East and West America.
Since Facebook was born, this incident has been rated as serious, the most extensive and the longest.