Buttons
Most of the buttons you use with iPhone are virtual ones on the touchscreen. A few physical buttons control basic functions, such as turning iPhone on or adjusting the volume.
Sleep/Wake button
When you're not using iPhone, press the Sleep/Wake button to lock iPhone. Locking iPhone puts the display to sleep, saves the battery, and prevents anything from happening if you touch the screen. You can still get phone calls, FaceTime calls, text messages, alarms, and notifications. You can also listen to music and adjust the volume.
iPhone locks automatically if you don't touch the screen for a minute or so. To adjust the timing, go to Settings > General > Auto-Lock.
Turn iPhone on. Press and hold the Sleep/Wake button until the Apple logo appears. Unlock iPhone. Press either the Sleep/Wake or Home button, then drag the slider.
Turn iPhone off. Press and hold the Sleep/Wake button until the red slider appears, then drag the slider.
For additional security, you can require a passcode to unlock iPhone. Go to Settings > General > Touch ID & Passcode (iPhone 5s) or Settings > General > Passcode Lock (other models). See the Basic section -> Security.
Home button
The Home button takes you to the Home screen, and provides other convenient shortcuts.
See apps you've opened. Double-click the Home button. Use Siri (iPhone 4s or later) or Voice Control. Press and hold the Home button. See the Basics sections -> Voice control and the Siri section.
On iPhone 5s, you can use the sensor in the Home button to read your fingerprint, instead of using your passcode or Apple ID. See Touch ID sensor on page 37.You can also use the Home button to turn accessibility features on or off. See the Accessibility section -> Accessibility Shortcut.
Volume controls
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.
Lock the ringer and alert volumes. Go to Settings > Sounds and turn off "Change with Buttons." To limit the volume for music and videos, go to Settings > Music > Volume Limit.
Note: In some European Union (EU) countries, iPhone may warn that you're setting the volume above the EU recommended level for hearing safety. To increase the volume beyond this level, you may need to briefly release the volume control. To limit the maximum headset volume to this level, go to Settings > Music > Volume Limit and turn on EU Volume Limit. To prevent changes to the volume limit, go to Settings > General > Restrictions.
You can also use either volume button to take a picture or record a video. See the Camera section -> Take photos and videos.
Ring/Silent switch
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 sound effects.
Important: Clock alarms, audio apps such as Music, and many games play sounds through the built-in speaker, even when iPhone is in silent mode. In some areas, the sound effects for Camera and Voice Memos are played, even if the Ring/Silent switch is set to silent.
For information about changing sound and vibration settings, see the Basics section -> Sounds and silence.
Use Do Not Disturb. You can also silence calls,
alerts, and notifications using Do Not Disturb. Swipe up from the
bottom edge of the screen to open Control Center, then tap
