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Microphone cuts out when main speaker is outputting sound.

So when on a phone call the microphone works fine but if I put it on loudspeaker the mic cuts out temporarily as soon as the other person speaks or if they have background noise the mic wont work at all, this also happens on FaceTime but everyting else (video, voice memos, siri) works as long as nothing is coming through the main speaker.

It’s like there’s some kind of short between the bottom microphone and the bottom speaker.

No other symptoms of Audio issues so thinking it’s not the common Audio IC fault.

Anyone know where I should start? Maybe change speaker + the bottom assembly with the mic, or do you think it’s a logic board issue?

There is not damage to the device and it looks brand new.

Thanks

Answer this question I have this problem too

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5 Comments:

Have you tried disabling noise cancellation?

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@kumowoon1025 I have not, will try and let you know! Thanks

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@kumowoon1025 Unfortunately still the same, I test it by calling with another phone and blowing into the mic of the other phone and the faulty phones mic cuts out when I do this.

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Strange... So if I understand correctly it's just the mic (or speaker) on the phone that does this, and not if you plug in one of those headphones with a tiny mic embedded in the cable?

I've only got one other thing you might want to try, if you have a provisioned SIM card from a different carrier, try activating your phone with it (some sequence of SIM swapping and restarting is involved, I can't quite recall the exact procedure). Or, if your (CDMA or formerly CDMA) carrier acknowledges and fulfills a "service reprovision" code, you could try that too. iOS does this when you dial ##873283# (update)

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Do you have any tool around to plug into you lighting port and see how any watts it’s putting out

Edit- can you tell me the out put

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