Apple iPhone OS 3.1 - Manual (Page 27)

By default, if you don’t touch the screen for a minute, iPhone locks automatically.
Sleep/Wake
button
Lock iPhone Press the Sleep/Wake button.
Unlock iPhone Press the Home button or the Sleep/Wake
button, then drag the slider.
Turn iPhone completely off Press and hold the Sleep/Wake button for a few
seconds until the red slider appears, then drag
the slider. When iPhone is off, incoming calls go
straight to voicemail.
Turn iPhone on Press and hold the Sleep/Wake button until the
Apple logo appears.
For information about changing how long before iPhone locks, see “Auto-Lock” on
page 145. For information about setting iPhone to require a passcode to unlock it,
see “Passcode Lock” on page 145.
Volume Buttons
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.
WARNING: For important information about avoiding hearing loss, see the Important
Product Information Guide at www.apple.com/support/manuals/iphone.
To adjust the volume, use the buttons on the side of iPhone.
Volume
up
Volume
down
To set a volume limit for music and videos on iPhone, see “Music” on page 158.
27 Chapter 2 Basics