Samsung SGH-S150ZKATFN - Manual (Page 41)

Call Functions 35
Silent Mode
Silent mode is convenient when you wish to stop the phone from
making a sound, in a theater, for example.
In Idle mode, press and hold until the phone vibrates. The
“Silent Profile On” message appears on the screen. The Silent mode
icon
is displayed on the screen. For more information, refer to
“Sound Profile” on page 66.
In Silent mode, your phone speakers are muted. An incoming call
causes the phone to vibrate and light up, depending on the settings
of the Silent Phone Settings feature.
To exit and reactivate the previous sound settings, press and hold
again until the previous Sound Profile is restored. The Silent
mode icon is no longer displayed.