It seems that updating iOS to version 11.3 has caused problems for several users of iPhone 7 and iPhone 7 Plus. Apple has admitted that some devices have a bug that causes the phone’s microphone to be disabled, making it difficult to connect to the phone.
The problem was widely reported by iPhones users on Reddit and Twitter, who pointed out that Apple’s out-of-warranty repair could cost $ 350. However, MacRumors had access to a document sent to Apple Authorized Assistance which reports that the company is aware of the problem and if the problem can not be solved by other means, it will allow the clerk to request an “exception” to the case. It is not clear whether the repair would be totally free of charge by the text in the internal communiqué, but seems to be the most likely.
The problem can be verified when the user makes a call over the phone or via FaceTime. In this case, the microphone icon appears gray, symbolizing the inability to operate. Support staff are instructed to ask users to disconnect any Bluetooth devices that may be connected to the iPhone as a possible solution. If it does not take effect, the employee is instructed to run the audio diagnostic tool, which should display an alert message explaining what the problem is, which allows to perform the repair.
The internal statement, however, does not explain what causes the microphone of some iPhones to stop working with iOS 11.3, nor does it make it clear that the company believes a new system update can fix the failure.