iPhone 4 mic not working during call

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...

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.

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.

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.

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.

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 ;-) )

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!

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

Turn on hearing aid mode in settings/ accessibility

Hi,

Did you manage to resolve the mic problem on my iPhone 4S?

I have exactly the same situation and can't resolve it!

(Can hear caller but they can't hear me)

Any suggestions (apart from the "teash can"!

Thanks,

John