iPhone 3G Speaker phone microphone mute issue

Hi there.
I'm having the same problem. When in speaker mode the microphone went dead.
Now my device is sent to service and I'm waiting for response.
How did you solved the problem ?

Hi all,
I have same problem.
Call receiver can not hear me when I talk in speaker mode. But when I turn it off, everthing becomes good. I dont understand the problem, coz iphone using only one microphone and I can record my sound verywell, and also I can talk on the phone without error. When I turn on the speaker, everything upside down, but it still uses the same microphone. so, the problem shouldn't be the mic!!
Is there anyone help us?!

Thanks in advance,
Alp.

For what it is worth, I am having the same problem. Tried the restart, then restore everything. No dice.

Restore as new or from a backup?

I would try another restore (make sure as new) and also try a replacement SIM card.

I'm experiencing the same problem; I guess it's just a software issue which hopefully will be addressed by next OS updates.

Have been having same problems for past few days. Although I had updated to sw ver 2.2.1 sometime back, I first noticed the problem 3 days ago when I could not use the bluetooth function in my car. Other party could hear what I was saying but I could not hear.

The speaker plays OK with iPOD. The headset works Ok to listen to. But no incoming voice on telephone calls.

Not sure if this is a hardware or software bug.

A friend had the same issue in reverse... after replacing cracked glass and touch-screen digitizer, the microphone would only work with speakerphone enabled. During one of his repeated attempts to take it apart and troubleshoot it, another friend broke his Home button by man-handling it and damaging the little copper leaf contacts inside.

He tried wiping the data, restoring the firmware (2.2 or 2.2.1 IIRC), etc but it did not appear to be a software issue. He could not do a restore-mode or DFU-mode FW restore because his Home button wasn't working, but that should not have been needed. Anyway, he's not stupid, so he was testing before and after loading his data backup and nothing he could do would fix it.

Using a Bluetooth headset, he suffered with it for a month and a half until iPhone OS 3.0 came out, which MAGICALLY fixed it, meaning it somehow WAS a software issue after all and his phone was not getting fully restored. He is very angry that iTunes or whatever is at-fault would claim to be doing a real restore and was not.

That said, my phone still reboots when deleting pics from Windows XP even in iPhone OS 3.0, so it doesn't fix all my problems. 😟

I want to precise this issue, which is behaving slightly different on my iPhone 3GS 16GB.

The microphone seems only to be muted in speakerphone mode, when the caller is talking. As soon he stops talking, he can hear, walk I'm saying.

When searching for some information on this issue I found similar topics for other mobile phones too. May be it is a feature but no bug?

Hi. Can you answer my question please?

😟