iPhone User Guide
- Welcome
- What’s new in iOS 12
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- Wake and unlock
- Learn basic gestures
- Learn gestures for iPhone X and later
- Use 3D Touch for previews and shortcuts
- Explore the Home screen and apps
- Change the settings
- Take a screenshot
- Adjust the volume
- Change the sounds and vibrations
- Search for content
- Use and customize Control Center
- View and organize Today View
- Access features from the Lock screen
- Travel with iPhone
- Set screen time, allowances, and limits
- Sync iPhone using iTunes
- Charge and monitor the battery
- Learn the meaning of the status icons
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- Accessories included with iPhone
- Connect Bluetooth devices
- Stream audio and video to other devices
- Control audio on multiple devices
- AirPrint
- Use Apple EarPods
- Apple Watch
- Use Magic Keyboard
- Wireless charging
- Handoff
- Use Universal Clipboard
- Make and receive Wi-Fi calls
- Use iPhone as a Wi-Fi hotspot
- Share your iPhone Internet connection
- Transfer files with iTunes
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- Get started with accessibility features
- Accessibility shortcuts
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- Turn on and practice VoiceOver
- Change your VoiceOver settings
- Learn VoiceOver gestures
- Operate iPhone using VoiceOver gestures
- Control VoiceOver using the rotor
- Use the onscreen keyboard
- Write with your finger
- Control VoiceOver with Magic Keyboard
- Type onscreen braille using VoiceOver
- Use a braille display
- Use VoiceOver in apps
- Speak selection, speak screen, typing feedback
- Zoom in on the screen
- Magnifier
- Display settings
- Face ID and attention
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- Guided Access
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- Important safety information
- Important handling information
- Get information about your iPhone
- View or change cellular settings
- Learn more about iPhone software and service
- FCC compliance statement
- ISED Canada compliance statement
- Class 1 Laser information
- Apple and the environment
- Disposal and recycling information
- Copyright
Update iOS software on iPhone
When you update the iOS software, your data and settings remain unchanged.
Note: Set up iPhone to back up automatically, or back up your device manually, before you update.
Update iPhone automatically
If you didn’t turn on automatic updates when you first set up iPhone, go to Settings 
> General > Software Update > Automatic Updates, then turn on Automatic Updates.
iPhone automatically installs updates wirelessly, and you’re notified before the update occurs. To see the currently installed version of iOS, go to Settings > General > Software Update.
Update iPhone manually
Go to Settings > General > Software Update > Automatic Updates, then turn off Automatic Updates.
At any time, you can check for and install software updates. Go to Settings > General > Software Update. The screen shows the currently installed version of iOS and whether an update is available.
Update using iTunes
Sync your device using iTunes.
iTunes checks for available software updates each time you sync.
See the Apple Support articles Update to iOS 12 and If you can’t update or restore your iPhone, iPad, or iPod touch.