12.2.2 Adjusting the Time Before the Screen Turns Off
If your mobile phone is idle forseveral minutes, it will turn off the screen to save battery power. To set a longer or shorter idle time, do the following:
1.On the Settingsscreen, touch Display> Screentimeout.
2.Select the duration you want the screen to be illuminated.
12.3 Setting Ringers
12.3.1 Turning On Silent Mode
1.On the Settingsscreen, touch Sound.
2.Select the Silentmodecheck box to silence all sounds except alarms, and music and video media sound.
12.3.2 Adjusting the Volume
You can adjust the volume from the Home screen or any application screen (except during a call or when playing music or videos). Press the Volume keys to adjust volume to the level you desire.
You can also adjust the volume from the settings screen.
1.On the Settingsscreen, touch Sound> Volume.
2.Drag the slider left to make the volume lower, or right to make it higher.
3.Touch OKto save the adjustment.
12.3.3 Changing the Phone Ringtone
1.On the Settingsscreen, touch Sound> Phoneringtone.
2.Touch the ringtone you want to use, and then touch OK. The ringtone plays when selected.
12.3.4 Changing the Message Ringtone
1.On the Home screen, touch 
> Messaging.
2.In the message list, touch 
> Settings> Select ringtone.
3.Touch the ringtone you want to use, and then touch OK. The ringtone plays when selected.
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