Echo and loud noise on call

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Many people on Modaco Forum reported this issue. I have 3 friends here in 
Portugal with the same issue.

Problem: Out going call sound is full of noise and people on the other side can 
here their echo. Sometimes it is so bad people can't even hear what we say.

Rom: Every LCR-F versions.

If I'm not mistaken this had been fixed on LCR 1.8.2.2 ("Better sound on call 
(can be configurer via LCR Settings)").

The problem was back with Froyo versions.

Original issue reported on code.google.com by g0n...@gmail.com on 20 Nov 2010 at 6:35

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I've been doing intensive testing and found that this happens when I have 2G 
only I think, or at least when no EDGE or HDSPA is present. Looks like the 
phone cant handle this network mode sound very well. I have other phones that I 
use along this one and this doesn't happen when on the same area in the same 
conditions.

It seems that interference and noise is amplified. Maybe some kind of 
attenuation could be made? Any more questions just ask.

Original comment by rei...@gmail.com on 11 Dec 2010 at 5:18

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I confirm, the problem is only in 2G call. Please fix bug quickly!

Original comment by filippo....@gmail.com on 8 Jan 2011 at 5:00

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This happens to me too and it's highly annoying.

I have tried with all the LCR settings and it still happens. They get a weird 
echo noise and all of a sudden a strong noise. It's like an interference, 
people often asks to me if i have some kind of radio or similar gadget around 
that causes interferences.

Original comment by gurrun...@gmail.com on 30 Jan 2011 at 8:37

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Greetings!
During the last few days, I have upgraded my S100 to 
OS_Acer_4.002.14.EMEA.GEN1_Pass_A1
then I applied the LRC-F 2.0. I have some tremendous improvements, however, the 
problem discussed above occurs, i.e. when I make phone calls, my partners 
complain about hearing themselves disturbingly loud. I have no idea how to fix 
the issue, I checked all LCR settings/Tweaks/Audio Call Mode settings, and I 
had transient improvement, for 3-4 calls the problem seemed to be gone, but 
then reemerged. I disabled and reenabled the new audio codecs, but no setting 
helped.
According to my experience, 2G and 3G has nothing to do with it. 
I think this is such a downside to the release, that I will have to revert to a 
previous version (like 1.8.2.2), but before all, I would like to know if it can 
be solved some other way.

Original comment by ii.zozo...@gmail.com on 16 Jul 2011 at 2:34