Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White.

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Microphone very faint while on calls or audio memos

hi -

A couple of day ago I changed the mainboard of my iphone 4 after finishing, I noticed that the Microphone was very faint, while on phone calls as well as making audio memos.

I tried:

Putting logic board in another iPhone frame - Microphone works fine

Putting Microphone in another iPhone frame - Microphone works fine

Putting dock connector in another iPhone frame - Microphone works fine


Logic board is OK

Microphone is OK

Dock connector is OK

Frame ???

Question: Can the phone frame basically cause this issues of poor sound recognition??

External microphone works fine with headset or handsfree via loudspeaker.

I really don't know where the problem lies.

Please help

Answered! View the answer I have this problem too

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The only thing would be the exit through the frame for the mic, check it and the screen mesh, it may have debris blocking the passage, good luck, If this Answer is helpful please remember to return and mark it Accepted.

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It was the little exit near the headphone jack....thank you very much for your reply!!


Your welcome and glad to help !


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mirko will be eternally grateful.
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