Good time of day.
Some days ago I had described a problem with the echo cancellation on my Samsung Nexus S, Android version 4.
The problem was that a remote side can't hear my voice approximately 5 seconds since beginning of call.
There is something like low gurgling instead of the voice.
Yesterday I was able to test "Linphone for Android 2.0" on Samsung Galaxy Nexus, Android version 4.1.1.