Apple has addressed an issue which causes iPhone handsets to become unusable when the date is set back to May 1970, or before.
The company has promised a fix for the issue, which was actually maliciously advertised on Reddit as a quick route to an unheard of iPhone Easter egg.
Readers were told to wind their phone back to January 1 1970 in order to discover an 1970s-themed hidden feature.
What 64-bit iOS 8 and iOS 9 devices owners who followed the instructions received was a bricked iPhone. Even placing the device in recovery mode failed to resuscitate the affected iPhones.
Now, on its support page Apple says: "Manually changing the date to May 1970 or earlier can prevent your iOS device from turning on after a restart.”
See also: Why we need an iPhone 5se
The firm has also revealed it’ll roll out a fix for the fatal flaw in a forthcoming software update.
Apple is also advising users who were tricked into the attempting the date-change to contact Apple Support for help.
In the meantime... just don't do it.