BlackBerry 9900/9930 Bold Series 사용자 설명서

• To decrease the volume, press the Volume Down key on the right side of your smartphone.
• To mute the volume, press the Mute key on the right side of your smartphone. To turn off mute, press the Mute key 

again. If you press the Mute key during a call, your smartphone mutes the call so that you can hear others on the call, 

but they can't hear you.

Related information

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Amplify the volume using the audio boost feature, 

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Change the default volume for calls

You can increase or decrease the default volume for calls. The higher you set the volume percentage, the louder the 
volume is.

1.

From the home screen, press the 

  key. 

2.

Press the 

  key > Options > In-call Settings. 

3.

Change the Default Call Volume field.

4.

Press the 

  key > Save. 

Improve sound quality during a call

You can't change sound quality when you are using a Bluetooth enabled headset.

1.

During a call, press the 

  key > Enhance Call Audio.

2.

Select a Boost Bass or Boost Treble option.

Improve sound quality for all calls

You can't change sound quality when you are using a Bluetooth enabled headset.

1.

From the home screen, press the 

  key. 

2.

Press the 

  key > Options > In-call Settings.

3.

Change the Phone Call Audio field or Headset Call Audio field.

4.

Press the 

  key > Save. 

User Guide

Phone

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