The bug allowed users to eavesdrop on conversations via FaceTime.
The group FaceTime feature on iPhones remains offline this afternoon.
Apple has taken down the feature, after a bug which allows people to eavesdrop, was discovered.
The glitch allows iPhone users to use the feature to listen to audio or watch video before a call has been answered.
A video posted to Twitter account @BmManski showed how simple it is to take advantage of the flaw and listen in on an iPhone being called using FaceTime.
Now you can answer for yourself on FaceTime even if they don’t answer?#Apple explain this.. pic.twitter.com/gr8llRKZxJ
— Benji Mobb™ (@BmManski) January 28, 2019
Apple says it will fix the bug in an upcoming software update.
