When you’re not using iPhone, you can lock it to turn off the display and save the battery.
Lock iPhone: Press the On/Off button.
When iPhone is locked, nothing happens if you touch the screen. iPhone can still receive calls, text
messages, and other updates. You can also:
Listen to music
Adjust the volume using the buttons on the side of iPhone (or on the iPhone earphones) while
you’re on a phone call or listening to music
Use the center button on iPhone earphones to answer or end a call, or to control audio
playback (see “Playing songs and other audio” on page 75)
Press the Home button or the On/Off button, then drag the slider.
Open Camera when
iPhone is locked
Press the Home button or the On/Off button, then drag up.
Access the audio controls
when iPhone is locked
Double-click the Home button .
Turn iPhone off
Press and hold the On/Off button for a few seconds until the red slider
appears, then drag the slider.
Turn iPhone on
Press and hold the On/Off button until the Apple logo appears.
By default, if you don’t touch the screen for a minute, iPhone locks automatically. To turn auto-lock
off, or to change how long before iPhone locks, see “Auto-Lock” on page 165. To require a passcode
to unlock iPhone, see “Passcode Lock” on page 165.
The Home button lets you get back to the Home screen at any time. It also provides other
Go to the Home screen: Press the Home button .
iPhone at a Glance
At the Home screen, just a tap opens an app. See “Opening and switching apps” on page 19.
Display the multitasking bar
to see recently used apps
With iPhone unlocked, double-click the Home button .
Display audio playback controls
When iPhone is locked: Double-click the Home button . See “Playing songs
and other audio” on page 75.
When using another app: Double-click the Home button , then flick the
app switcher from left to right.
Start Siri (iPhone 4S) or
Press and hold the Home button . See Chapter 4, “Siri,” on page 39 and
“Voice Control” on page 30.
When you’re on the phone or listening to songs, movies, or other media, the buttons on the side
of iPhone adjust the audio volume. Otherwise, the buttons control the volume for the ringer,
alerts, and other sound effects.
For important information about avoiding hearing loss, see the Important Product
Information Guide at www.apple.com/support/manuals/iphone.
To limit the volume for music and videos, go to Settings > Music.
You can also use the volume up button to take a picture or record a video. See “Taking photos and
videos” on page 92.
Flip the Ring/Silent switch to put iPhone in ring mode or silent mode .
In ring mode, iPhone plays all sounds. In silent mode, iPhone doesn’t ring or play alerts and other
Clock alarms, audio apps such as Music, and many games still play sounds through the
built-in speaker when iPhone is in silent mode.
For information about changing sound and vibrate settings, see “Sounds and the Ring/Silent
switch” on page 161.
iPhone at a Glance