Chosen Solution

Hi Guys! This one is probably for an iPhone 4 expert. The problem: Outgoing sound (my voice), suddenly and unprovoked, drops out during calls. There is a small static sound, and sound is gone. The person in the other end goes “Hello, hello..” and then hangs up. This will happen no matter what mic is used. I tried all 4 sources: Main mic (bottom right) Speakerphone mic (located in headset jack) Bluetooth And of course, an ordinary minijack headset Solutions already tried:

  1. If I bump the bottom of the phone on a table, or another hard surface, sound will be back for a while, but usually not for long.
  2. I have tried to change the docking module, with the standard mic attached to it = NO LASTING CHANGE!
  3. I have tried to take the phone apart and assemble again = NO LASTING CHANGE Both solutions seemed to work for 30 min or so. Then, sound gone again! I have tried to “irritate” the jack plug, to see if it was stuck somehow, but it didnt seem to change anything. I have checked all ribbon cable connectors with a microscope, and they seem fine. I could understand, if it was in the big dock-connector at the SIM tray that was causing this, but the coming and going of sound, with bumping the phone don’t lead my suspicion to a bad connection in that sort of plug. Especially not since I changed the whole dock module, and thereby also the plug. Edit: It records LONG memos without any problem, so the problem has to be in the “transmission/sending” part of the phone, rather than in the “mic department”. Unfortunately, I bought this phone 2’nd hand, and didn’t get a reciept so warranty exchange is not an option. Futhermore, I had in laying on my shelf for a month before I got around to use it, so it’s useless to complaint to the previous owner (who, I am pretty sure, knew about this problem, based on the fact that the problem is constant and persistant). I REALLY hope some iPhone expert can help, as this seems to be a problem that seems hard to solve. Thanks in advance!

Seems you need to reball the IC… http://www.youtube.com/watch?v=C-n1LJEK3… Check that out and see if it works for u, I got the same problem! Please contact me in randy.castilla@gmail.com

I have had luck with installing a shim of thick card stock over the audio compiler and reinstalling the board cover. This applies enough pressure to get the ic to work sometimes.

me pasa que la funcionalidad del audio en todas las aplicaciones es correcto pero en las llamadas se cae la linea de mi micrófono ya que quedo escuchando del otro lado pero no me escuchan…. en ocasiones en medio del problema bajo y subo el control del volumen y en algunos casos me ha servido por un momento….. busco una solución real ya que vivo en Colombia y no encuentro respuestas. gracias por su ayuda…

I have noticed that you can make it work if you bend the iPhone like if you hold it in landscape mode and push the upper right corner forward, and left upper corner backward (or opposite).

Above is all hold supported and true, your iphone is facing terminal failure due to bad audio ic. My recommended way is to remove the back cover, heat up the audio IC area while in a speakerphone call untill you hear sound. For 10 seconds of sound, quickly blow the area with canned air and cool it down. Voila you have it worked better for longer until it recurs again. You can do that for a few times until total failure. Thanks and good luck.

If the microphone doesn’t work in GSM calls but works in SKYPE or other applications, it is 100% the audio compiler that needs to be reballed. Reballing the audio compiler should only be done by a professional with a lot of experience. In the same area as the audio compiler is the touch ic, wifi module and the cpu is on the back side. If you use too much heat, you can damage one or all of those components. If you live in Europe, we have a 100% success rate with reballing or sometimes replacing the audio compiler. If you live anywhere in Europe, you can send your iPhone to iRepair Greece and we will repair it for you and guarantee the repair for 1 year. You can check our website for current prices.

Follow this.. It works. http://www.youtube.com/watch?v=DPR8qrAcg…

I have the same issue and I found only hardware solution like you:

  1. reball the audio compiler ic.
  2. embed piece of plastic between chip and shield to fix connection between chip and motherboard by pressure. I was looking for some software solution to get round this problem with audio compiler so calls will be performed in the same way like in case of Skype, Viber or any other app. I think, this can be elegant solution and will help many of us who are out of warranty. Maybe this will be possible only on jailbroken devices. However I didn’t find anything. If you guys find, let know world about it please.