Apple update may have muted your iPhone

A leaked Apple memo reveals its iOS 11.3 update may mute some iPhone 7 and iPhone 7 Plus. — Reuters

If your iPhone 7 or iPhone 7 Plus microphone seems buggy following the iOS 11.3 update, Apple may have a solution, an internal memo reveals.

An internal document distributed to Apple Authorised Service Providers obtained by MacRumors reveals that the iOS 11.3 and subsequent software versions may be unintentionally disabling microphones on these phones.

The note says affected customers may experience a grayed-out speaker button during phone calls, which can also prevent users from being heard during phone calls or FaceTime video chats.

Users facing such issues are asked to disconnect or turn off any Bluetooth headphones or other audio accessories connected to their iPhone to check if that solves the issue.

If the problem persists, Apple Authorised Service Providers have been instructed to run audio diagnostics but at this point it’s not clear if it’s limited to the United States.

Affected devices will display a “device could not detect dock” or “accessory not supported” alert in the diagnostic panel, in which case the service provider can initiate a repair for the iPhone.

They have also been given the green light to fix affected iPhone 7 or iPhone 7 Plus that are no longer covered by warranty.

However, Apple’s document does not specify if the repairs will be done free of charge.

Apple has not confirmed this issue publicly, but MacRumors claims it verified the document’s authenticity with a reliable source.

AppleInsider confirmed the issue with its own source, who says it is an “extremely rare problem, with a need for repair being rarer still”.

However, complaints about the microphone issues on iOS 11.3 have emerged across Reddit, Twitter and Apple Support Communities since the update went live.

The sources have not shed light on why the software update is disabling microphones on some iPhone units, though the fact it could require repairs at a service centre suggests the software update could be causing a hardware defect.