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19Control & customize
• To go back just one screen, tap Back .
• To close a touchscreen keyboard, tap Back .
• To reopen an app you closed, tap Recent and tap the
app in the list.
• To reboot an unresponsive smartphone, press and hold
both the Power and the Volume Up keys for about
15 seconds.
Press
Power key
Press and hold the Power key
to choose
Power off
,
Airplane
mode
(no wireless
connections—see “Airplane
mode” on page 58), silent ,
vibrate , or sound on .
Put the touchscreen to sleep
by pressing the Power key. To
wake up the touchscreen, just
press the Power key again.
Tip: To add more security to your smartphone, see “Protect”
on page 58.
Power
Key
Volume keys
Your volume keys help in a few ways:
•Ringer volume: Press the keys in the home screen. Press
them when your smartphone is ringing to silence it.
• Earpiece volume: Press the keys during a call.
• Music/video volume: Press the keys during a song or
video.
Speak
Just tell your smartphone what you want.
Tip : Speak naturally but clearly, like using a speakerphone.
• Dialing and commands: Tap . To dial, say “Call” and
then a contact name or phone number. Or, say a command
like “Send text,” “Go to” an app, or “Help” for voice
command help.
Ti p: If a contact has more than one number, you can say
which number to call. For example, “Call Joe Black Mobile”
or “Call Suzi Smith Work.”
To choose the confirmations and prompts you want to hear,
tap > Menu >
Settings
>
Voice
.
To set up your phone to start listening to your commands,
see “Touchless control” on page 12.
•Search: Tap in the home screen to search by voice.
To change your voice search and text-to-speech settings,
tap Apps >
Settings
>
Language & input
.