Sprint Nextel 755P ユーザーズマニュアル

You can immediately silence all alerts, ringtones, music that plays through the built-in 
speaker, and system sounds by sliding the Ringer switch to Sound Off 

. This does not, 

however, mute the audio during a phone call.

Slide the Ringer switch to Sound Off 

. Your device vibrates once to let you know 

that you’ve turned sounds off.

To hear all sounds again, slide the Ringer switch to Sound On 

.

When you slide the Ringer switch back to Sound On 

, it restores the previous sound 

settings. 

Your device includes a silent alarm that can vibrate even when the 
Ringer switch is in the Sound Off position. For information on setting 
the vibrate option, see the User Guide.