Mystery Indicator
 

I have a Blackberry Bold 9000 and have recently noticed a mystery indicator on the screen when I make a call.

Its a rectangle with what appears to be five diamond shapes running diagnolly the interior of the rectangle.

If I press the handsfree it disappears but returns when i go off handsfree.

Can anyone help identify please

Its enhanced call audio.
green call button - menu - options - general options - the bottom 2 options.

Well its simple. It will be in the in the top right corner of the screen. Its a rectangle with a line of 5 "+" signs going from the top left to the bottom right or vice verse. Actually enhanced call audio is turned on, and the icon is an equalizer. Therefore, you have bass boost or treble boost turned on. The treble boost is in opposite direction of bass boost, and would be off for normal.
You can change this option either while on a call by pressing the menu key and then Enhance Call Audio, or you can go into your call history (press the call button from the home screen), press the menu key, select Options, and then General Options. The enhance call audio options are at the bottom of the list.