iPhone 4 microphone not working

I am having the same problem with my wifes iphone 4 so I took her phone apart and removed her motherboard or mainboard and put it in my daughters iphone 4. I made a few phone calls and the microphone worked normal so I have come to the conclusion that it is the ribbon cable assembly that controls the power button, proximity sensor, and the second microphone which I guess is the noise canceling microphone. I can't see it being any of the other cables. I am going to take the iphones apart again when they get home and experiment a little more but I already ordered the cable on ebay for a few bucks because I am pretty confident that is the problem. I will post back the results.

Well I changed the part and it did not help. Then I took the main microphone on the bottom of the phone off and behind the silver mesh that is over the microphone is some kind of black felt like stuff over the mic. There was some crap on the felt. Like some kind of shiny dried fluid. I cleaned the silver mesh and the felt with a little soap and a toothbrush and put it back together and now it works great. Weird how it seemed to work fine on speakerphone though and not during regular calls. When speakerphone is on it must booth the microphone up real high. Anyways I now have a happy wife again.

SAME PROBLEM AS EVERYONE ELSE ON THIS THREAD.

ALL CALLS MUST BE MADE ON SPEAKERPHONE OR ELSE NO ONE CAN HEAR ANYTHING !

(good luck trying to have a conversation in a noisy environment or a place where you cannot make loud noise, e.g: library, etc)

...IT SEEMS APPLE HAVE SOME FAULTY MICROPHONES ... 😠 explanation please?!?

(on my 2nd iphone 4 and no sign of improvement AND warranty has run out so i cannot get it replaced for free... no way i'm spending over 150$ to get this fixed ! FML.)

Did you try the tricks and tips I recommend to see of they solve your problem?

yeah didnt change anything ...

Hi. I have the same problem. Got my iphone 4 second hand. Kind off ****** about it. It worked great when I used earphones with a microphone but not without the mic. It also worked on Speaker. It seemed like there was something blocking the microphone on the phone. Im trying to clean it off. Good luck to every one else if your having this problem.

I see they bleep curse words on here. Any ways I took a peice of cotton and licked it a little and tried to gently scrub the microphone. It seems to have worked for now. If I were you I would try that.

i tried... it didnt change anything for my microphone...

explaining the 😠 / 😢 feelings i have towards Apple and their malfunctioning iphones !

(let alone their manufacturing process....)

Hi,

My Iphone 4 mic suddenly not working properly(very low volume), however when i turn speaker on, it works fine. voice memo also ok. calling with headset is also ok. look like same problem 🙂

Any Solution?? i already tried Reseting and cleaning activity.

Regards

Any solution available to hands free mic not working? I have replaced the dock assembly and cleaned everything up. I can use voice memos but no hands free, no audio on video. Regular mic on phone works fine just goes dead when switched to hands free. Any fix to this problem.

thank you

tim

Did you try cleaning out the tiny (very tiny) noise cancellation port next to the on/off button on the very top of the phone? Use a can of compressed air to blow it clear. It may take a few shots, and will gradually get better as you clean it until it functions like you would expect.

This may not be the fix to your particular problem (this seems like a symptom for multiple issues) but for me, some gunk clogged the port (I couldn't see that it was clogged, just took a guess) and used a can of compressed air to blow it clear.

If the noise cancellation port is clogged, this would cause the symptoms you would expect: phone can record sound while in an app or can use the microphone during speaker phone mode, but not during regular handset operation. This is because the noise cancellation microphone located in the port is only used during the handset phone call operation mode, and not at any other time.

I had this problem and solved it with a vacuum cleaner:

http://jayyoo.com/post/13478325843/iphone-4-mic-not-working-stupid-fix

I too have had this problem with the iphone 4s. Followed your link and cleaned out the noise cancelling microphone by the jack socket and all is fine now.

Many thanks for the advice.

Richgsx

Having this problem as well on a 6 month old swap unit iPhone 4. Apple only has a 3 month warranty on Swap Units so they basically said get another swap unit or you're SOL. 😟

Will keep trying the mic solutions and all the stuff on Youtube. Really disappointed in Apple.

I had a similar problem with iPhone4 and the mic stopped working i.e. when we make phone calls, the other party is unable to hear. After trying options to troubleshoot the iPhone at home based on guidance from Internet, I finally took an appointment with Genius bar at Apple store. The store mentioned that there are basically 2 mics in iPhone. One is used for voice memos, internet based services, etc. That mic was working but the other mic was not working. The advisor suggested that the mic cannot be repaired and that a replacement handset will have to be purchased as iPhone4 was out of warranty. After paying HKD 1168, I got a new iPhone4.