Heavy background noise due to phone lock in handsfree mode during calls (lg optimus one)

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What steps will reproduce the problem?
1.make a sip call with lg optimus one
2.
3.

What is the expected output? What do you see instead?
during calls voice is at very high volume and with an heavy noise because it 
came out in handsfree mode. Nothing changes if you press the button to 
disable/enable handsfree mode. 

What version of the product are you using? On what device/operating system?

lg optimus one with android froyo 2.2 

Which SIP server are you using? What happens with PBXes?

i'm using eutelia but i've not tried pbxes. In any case eutelia works very good 
on my acer liquid 2.2 with sipdroid.

Which type of network are you using?
3g wind network italy
wifi with no firewall

Please provide any additional information below.
other applications like skype and nimbuzz has this problem.
Lg optimus one has only one audio output for handsfree and no handsfree mode. 
Maybe there problem is due to this.

Original issue reported on code.google.com by francesco.pulcini88@gmail.com on 17 Dec 2010 at 9:32

[GoogleCodeExporter]

I have the same problem with the same devace (LG optimus one - froyo 2.2), with 
the same network, but I'm using Messagenet as SIP Server. I hear noise in 
background, but on the other side people can hear me very well, just on my 
phone there is this problem.
The same service works without problems on my Nokia n82

Original comment by dcodegoni@gmail.com on 3 Jan 2011 at 10:34