type this 2945#*#
you will go into engineer mode.
now go to option no.4 Audio
select option .1 select mode
now select no.2 loud spk mode.
press back button
now choose no.3 button LOUD SP MODE
sELECT all setting to Volume 6
You have done now give try to your messag tone ...you will notice a great increase in your message tune....it will work for ringtune and other audio functions too..
in same manner you can also increase mic(object piece which catches your sound) Volume..
so that you may talk 5 meters away and sound is still pretty kool while recording.