Adjust the Volume During a Call:
If the sound in your handset, headset, or speakerphone is too loud or too soft, you can change
the volume while you are listening to the other person. When you change the volume during a
call, the change only affects the speaker you're using at the time. For example, if you adjust the
volume while you're using a headset, the handset volume doesn't change.
Procedure
Press Volume right or left to adjust the volume while you are on a call.
Adjust the Phone Ringer Volume:
If your phone ringer is too loud or too soft when you get an incoming call, you can change the
ringer volume. Changes to the ringer volume do not affect the call volume you hear when you
are on a call.
Procedure
Press Volume right or left to adjust the ringer volume when the phone rings.