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Henri Johnson
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Why does my iPhone3G only works with external MIC/Headset?

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My iPhone 3G only works with external mic/headset.

People cannot hear me speak, nor does the Memo Recorder work, except when an external mic/headset is plugged in.

Thank you

I installed a new docking PCB, but the problem is still the same. I can hear the caller, but the caller cannot hear me. In addition to that the Memo Recorder on the IPhone does not record any sound - except when I plug in an external mic. Could there be a problem with the external mic connector in that it has a defect that causes the external mic connection to override the internal mic, always?

Henri Johnson,

that sounds baaaaaaad - can you tell me sonething about the phones history? fluid damages, dropped, overrun... - if the internal mic isn't working, but the earpiece is (we have to rule out that the phone isn't stuck in headphone mode) also the speaker/buzzer in the dock is working normal - then there is a problem with the audio codec ic or the connection between the dock connector and the audio ic

markus weiher,

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markus weiher
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I disagree with rab, since the microphone does not work - the dock connector neeeds to be replaced.

here is the part

and here is the guide

check the guide for the tools you well need to fix the problem

Guide Image

Installing iPhone 3G Dock Connector

If OP can't hear other speak that'd point to the earpiece speaker

rab777hp,

in his case: "People cannot hear me speak, nor does the Memo Recorder work, except when an external mic/headset is plugged in." - it's the microphone - they don't hear him - so his mic is dead, if he wouldn't hear them - the earpiece would be the dead part

markus weiher,

Righttt, I need to read these more clearly, I'm doing to delete mine and upvote yours.

rab777hp,

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Dee
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I'm having same issue. I already tried replacing dock connector. My iPhone have never had any water damage, but I did drop it and thats when it stopped working.

Is there any other suggestions to test what part may be the cause?

Edited by: Dee ( )

check cable number 4

markus weiher,

Markus, I have checked it numerous times. It seems to be connected right. I also inspected the capacitors/resistors that are in series with it, and they seem ok. Its strange how everything on the dock connector works, except the mic. Not sure what other components are tied to the mic. Perhaps the Audio chip might have a weak pin that isn't making contact. The last resort I can think of to fix this problem is try to re flow the chip with a heat gun. But I'm afraid I might damage other components. Never worked on iPhones before.

Dee,

check the parts in the area around connector 4, anything missing? what kind of heat gun do you use? i used mine a few times on th iphone/ipod touch - but you must be extremely careful - almost every part is underfilled

markus weiher,

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francute
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I have the same problem too. I have tried to replace the microphone assemnbly and still didnt work.

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Lee Nolan
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im suffering from the same problem after i installed a new complete screen £44.99 simple replacement but im having the same issues yes it was jailbroken but i decided to restore it back to factory settings losing everything but i backed up my settings etc but its still the same please help as i carnt afford more trouble

thanks

Lee, you are answering someone else's problem.(from a year ago!) If you need help then start your own question with more details about the phone

pollytintop,

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Justin DuShane
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Yeah I have a Similar Problem... My Speakerphone Speaker wasn't working so I changed out the docking assembly and now the Microphone's not working so I put back in the old docking assembly and NOW!!! that ones mic is not working... and it was before this whole process started... NEED A MIC FIX!!! don't know what else to do

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amanda
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i got a iphone 3g of ebay and i cant hear anyone or they cant hear me i can only hear them when i put it on loud speaker what is wrong with this the person i got this off wont give my money bk and is making out ive done this when i didnt all i did was put my sim in can someone plz let me know if i need a mic for this and if so where do i get it from thanks

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