Chosen Solution
Hi, I have an iPhone 7 Plus with a non working microphone. I can’t record audio from videos, Siri in irresponsive and third parties app with microphone access do not record anything. The voice memo app can’t even record. The phone can’t detect headphones and even Bluetooth headphones with built in microphone are not working. I thought it was a microphone issue, so I replaced the lightning flex. However the problem is stil here. How can I solve? Update (04/12/2018) I did a complete wipe, but it didn’t work. Maybe is the replacement defective as well as the old one,(I bought at 5euros on ebay). May it be an issue with other microphones? as the rear microphone or the front microphone , since i did not replaced them? Yes the problem appeared by itself. However, connecting Bluetooth headphones works(I can dictate the text), whereas the lightning headphones are not detected. Also speakers do work.
If the problem appeared by itself then the fault is caused by the audio IC chip on the logic board going faulty. I recommend backing up your phone ASAP because that phone is going to get stuck on apple logo soon. This issue can be only fixed via board-level repair.
Is the phone up to date in software, if not I recommend updating the iOS. I would also consider cleaning the grills out before installing a new assembly if that was not done. The other possibility is that the replacement item is defective.
