HTC evo 4g lte Mode D'Emploi

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Basics
Adjusting the volume
Adjusting the ringer volume
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Press the Volume buttons to adjust the ringer. The Ringer volume window
appears on the screen to display the volume levels.
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While in the lowest ringer volume level (Silent mode), press Volume down once
to switch to Vibrate mode. The vibrate mode icon 
 appears in the status bar.
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While in Vibrate mode, press Volume up once to switch to silent mode. The
speaker mute icon 
 displays in the status bar.
Adjusting the earpiece volume for calls
During a call, press the Volume buttons.
Adjusting the media volume
When playing music or watching video, press the Volume buttons to adjust the
volume. The Media volume window appears on the screen to display the volume level.
Sleep mode
Sleep mode saves battery power by putting HTC EVO V 4G into a low power state
while the display is off. It also stops accidental button presses when HTC EVO V 4G is
in your bag. You’ll still receive messages and calls though, and missed calls and
messages appear on the lock screen.
To prevent missed calls or messages from appearing on the lock screen, press 
and then tap Settings > Privacy.
Switching to Sleep mode
Briefly press the Power button to turn off the display and switch to Sleep mode. HTC
EVO V 4G also automatically goes into Sleep mode when it’s idle for a while.
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Basics