7Switch sound profiles(shortcuts)To quickly switch your device from one sound profileto another, use one of the following shortcuts:• Vibrate: press the Volume key up or down and tapthe icon in the centre ( ).• Silent: press the Volume key up or down and tapthe icon in the centre ( )• Ring: press the Volume key up or down and tap theicon in the centre ( )Set time for the backlight andSleep modeSet the device to turn off the backlight and switch toSleep mode when not in use. By doing this, you cansave battery power and reduce battery consumption.1 Tap Start > Settings.2 From the Basic Settings tab, tap General Settings> Power > Battery Power.3 Select a duration from the Turn off backlight field.4 Select a duration from the Turn off device field.5 Tap Done.• Your device automatically turns off the screenwhen you hold it close to your face during a call.When you distance the device from your face,the screen turns on again.• Even if you select Always turn on, the screenturns off 1 minute after it turns on during a call.