iPhone 4: faulty microphone or audio chip problem?

It happens a couple of times a week. More often sometimes. Customers come in to our workshop or email us about a microphone issue on their iPhone 4.

How do you know it is the microphone?

  • the person at the other end can’t hear you

  • there is no sound on videos recorded with your iPhone

  • there is a crackling noise.

However, sometimes, the problem is not the microphone, but something else... The microphone/ audio chip problem was a tricky issue for quite a long time. And not only us, the 'Genius' technicians at the Apple store were also clueless about what might cause the problem. We found the answer - the audio compiler chip, and have tried different methods to find the solution, and didn’t give up until we came up with it.  What led us to the conclusion that it’s NOT the microphone? ‘Last week you repaired an iPhone 4 for us which had a microphone problem (no one could hear us speak), but the issue has come back again. I was hoping you would be able to have another look for us.’ In this case, it turned out that the problem was not the microphone but the audio compiler chip. We asked our customer to come back with the iPhone, and we performed the audio chip repair. We can do it for you as well, at any time, free of charge. Not able to come over to our workshop or to send the phone to us? We thought about this already. Our colleague Cosmin recorded a video where he shows you step by step what you need to do. The video has more than 50,000 viewings so far, and it seems that a lot of people have managed to fix the problem on their phone after watching it.
Works perfectly, been going solid now for 2 weeks, you saved me a lot of cash for a few minutes work.
John Lawler
This worked like a charm, I thought I was going to break it during the process but I worked very carefully and took my time and followed the video. All the tools you need is the weird pentalope and a small phillips and flat head. Also used a guitar pick taped to a pencil for the prying. Worked pretty well! Thanks for the video!
You can also read our article on iPhone 4 audio problem: fixing an audio compiler chip fault . You’ll find here everything about this issue and what tools you need to use in case you feel confident and want to try to fix the problem yourself. WARNING: Proceed at your own risk. We are not responsible for any damage you might do to your iPhone!
John Lewis
Fair warning.. if you're not somewhat familiar with how to work on electronics that are small and sensitive then you really should not attempt this operation. i.e. if you are unaware of how easy it is to generate electrostatic charges and how to dissipate them properly.
If you encounter this problem, don’t hesitate to get in touch. Give us a call on 020 7078 4341, or just book an appointment for an iPhone 4 microphone repair. Then leave the rest to us. We’ll do our best to help. P.S. The problem is not so common on iPhone 4S, but when it happens, our technicians advise that it has to be handled a bit differently. We haven't found the perfect solution just yet, but we’re working on it!
November 27, 2013