Hi everyone, we are aware that you may be experiencing difficulty accessing Facebook, Instagram and WhatsApp at the moment. Facebook has publicly announced that this outage is affecting a number of their users globally. Meanwhile, you can still continue to call, text and use internet services normally on the StarHub network.
[Update @ 4pm, 14 March 2019]
Although Facebook has yet to declare a resolution to the outage at the FB Developers page, the issues seems to be resolved.