How to improve sound quality during a phone call or for all phone calls

Note: You can only change sound quality for the earpiece on your BlackBerry smartphone.

To improve sound quality for all phone calls, complete the following steps:
In the Phone application, display the menu and select Options.
Click General Options.
Change the Enhance Call Audio field.
Display the menu and select Save.
To improve sound quality during a phone call, complete the following steps:
During a phone call, display the menu and select Enhance Call Audio.
Select Boost Bass or Boost Treble.
Display the menu and select Save.
To review the different Selectable Phone Equalizers during a phone call, press the L key. The enhancement specific icons are displayed on the active call screen.

Note: If an enhancement is selected, the enhancement specific icon is be displayed on the active call screen.

Regards,Trigger