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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iPhone 4 mic not working during call

Hi,

probably this question has been asked many times

here is my problem

i have an iphone 4, during incoming or outgoing call, i can hear other people, but other people can't hear me, i've tried speaker mode,same thing. have not try headphone with mic yet.

i tried to go to camera, and record a short clip, i can hear my own voice though, so it is only happening during calls.

here is what I've tested so far

i have another perfectly working iphone 4, so i began to swapping parts.

first, i swapped the motherboard only, and it seems like it is not the motherboard. because the mic problem iphone motherboard transfer to a good phone, and i can hear people and other can hear me.

and the good iphone motherboard on the bad mic iphone housing still have the mic problem.

my guess i narrowed it down to the housing.

so continued swapping the bottom speaker, bottom mic and charging port, it seems like these parts from bad iphone housing to a good iphone are working.

so it doesn't seem like problem on lower mic and charging port, lower speaker/antenna.

what else should i try?

Answer this question I have this problem too

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tried replacing the dock connector?

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Has the phone got any type of damage before? If not then its probably because theres connection problems. Or it can be because its old. Is it old? I had the same problem before thats why im telling these advice.

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oldturkey is right , just change the dock connecter . your problem will be solved if this logic board is working normally in another phone . if the same dock connecter working in another phone , then try to proper reseat the charging connecter on the logic board.

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Hello,

You have almost done everything possible, but try doing a restore in itunes, might be your only chance if you have tried everything else. Unless of course someone else thinks of another solution.

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ok

i finally got it working

but did many things at once.

i don't know which fixed the problem,

restored 5.1.1 from itune and

i went general, accessibility, hearing, and turn on hearing aid mode,

also took out the motherboard, rubbed every part with 70% alcohol, and use hair dryer on high heat, remove the EMI shield, blow the audio compiler for a short time, put a small business card paper to pad on top of the audio compiler IC.

and pad the sim card tray area on the back of the iphone.

turn it on, and it works.

i was afraid to undo and break it, so i am leaving it as it is in working condition.

i am not sure if i've misdiagnosed the problem,

but it seem like the problem might be on the motherboard, not housing.

because i have too many parts laying around at the time.

by

Well thats good to know it's back up and running. It's best to use 100% (or close to) alcohol in stead as the rest or in your case the 30% mainly contains ingredients that can harm the board. I now always do a restore in itunes has this can fix many problems from quick battery drain to extreme slow loading and speeds.

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Your phone is faulty, it has a manufacturing defect that was there when you purchased the Phone. This is a hardware fault and will only get worse over time.

Request a Refund or replacement ASAP even if the phone is out of warranty. As the You Tube video Suggests a defective soldering joint comes loose over time, sometimes within warranty sometimes not.

Apple should offer immediate replacements for all users affected by this issue where the phone has been looked after as per manufacturers recommendations and not neglected by the end user.

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hi, had same problem with my iPhone 4 that i bought from eBay.

tried everything that did not involve opening the phone but nothing worked, just could not understand it... So after reading what jamespribil said i gave it a shot with isopropyl alcohol, gave it a nice bath for about 2 hours and cleaned it from time to time with a touth brush, to my amazement it worked... crazy but it did.

When i opened the cover on the logicboard, one thing i noticed was that there was only plastic protectors under one cover and not 2 like its suppose to be, do not know if that was what caused the problem but just glad i came here, as i was not going to do that...

Just wanted to share that it worked for me, but do not open logicboards if you do ot know what you are doing, thanks...

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its not any of the above. its the software you are currently running. i have the same problem on my iphone 4s theres nothing you can do about it until apple decide to release the 6.1.4 update. So no need to worry guys. its all good in the hood. chin up.

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You obviously know a lot more than I do about this stuff, but this worked for me: http://youtu.be/0jhWxYTVxe4

(And it is quick and dirty ;-) )

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If you are looking for the straight forward fix for the Mic related to in phone call conversation which is connected to the Dock as one unit, go to this: click here

@ that link there is a repair video and guide. Whatever works for you, you will find the repair info you need, this is the repair example of the GSM version, just look around with what you find on this guide and Google for the CDMA version...Hope This is clear and helpful, if it was offer a score point.....Cheers!

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Hi,

I have the same problem with my iphone 4, mic doesn't work only during calls and it's absolutely fine with any other app. I was trying to find out what the problem could be and I realized that there are so many people that wondering about the same thing.

All I read in the forums were about:

1. hardware fault, that doesn't make sense to me cos it sounds more like software issue.If it is hardware fault then how can the same microphone work with Viber or any other app??

2.Antenna problem

3.ios 6 and latest updates

I bought my iphone second hand in a perfect condition, the microphone was working properly the first days and then it did that thing. The truth is that I did an ios update and I think that it started after that but I'm not sure.

I only have the device for 2 weeks and I don't know many things about iphones but the hole thing doesn't sound right to me.

Any suggestion except restart and reset???

Thanks

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For those still referring to this post, I can suggest one more approach.

I will label everything on the faulty phone as "problem …"

IF restoring the software does not solve this issue, and software problem is excluded, I would try the following:

1/ Transfer "problem board" to known good casing.

2/ If problem is solved, then transfer "problem dock connector" to known good casing.

2/a/ If problem reappears, replace the "problem dock connector." This should solve it.

2/b/ If problem does not reappear, you might want to look at the upper mic on the "problem casing."

The upper mic is part of the iPhone 4 Power and Sensor Cable.

First try cleaning the connectors of that flat cable, and the connector on the board where this flat cable attaches. Use a proper solvent such as "contact spray" or 90%+ isopropyl alcohol. Just drop a tiny amount on a clean toothbrush and lightly brush both the cable connector and the board connector. If this does not help, try replacing the whole connector.

Additional note: on the outer frame of the phone, next to the headphones jack hole, there is a tiny "pin" hole. Make sure it is not obstructed, as this could cause issues with sound => although it should not completely suppress it.

iPhone 4 Dock Connector (GSM/AT&T) Image
iPhone 4 Power and Sensor Cable (GSM/AT&T) Image
iPhone 4 Dock Connector Image

Guide

iPhone 4 Dock Connector Replacement

Difficulty: Difficult45 Minuten - 1 Stunde

iPhone 4 Power & Sensor Cable Image

Guide

iPhone 4 Power & Sensor Cable Replacement

Difficulty: Difficult1 - 2 horas

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Turn on hearing aid mode in settings/ accessibility

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bronzemaxell will be eternally grateful.
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