Advice on Facebook, Instagram, WhatsApp and Facebook Messenger are DOWN

Facebook, Instagram, WhatsApp and Facebook Messenger are DOWN: Social media apps crash for frustrated users worldwide
First reports of problems with the social media sites came at 16:44 BST (11:44 ET)
Facebook, Instagram, WhatsApp and Facebook Messenger all reported issues
Soon after the first report, the hashtag #facebookdown was trending on Twitter
They're some of the most popular social media apps around the world, but it appears Facebook, Instagram, WhatsApp and Facebook Messenger have all crashed.
According to DownDetector, the issues started at around 16:44 BST (11:44 ET), and are affecting all users. By 17:24 BST over 50,000 people had reported issues.