User guide

Chapter 3 Basics 33
File sharing
You can use iTunes to transfer les between iPhone and your computer. You can also view les
received as email attachments on iPhone. See Reading mail on page 51. If you have the same
apps that work with iCloud on more than one device, you can use iCloud to automatically keep
your documents up to date across all your devices. See iCloud on page 15.
Transfer les using iTunes: Connect iPhone to your computer using the included cable. In
iTunes on your computer, select iPhone, then click the Apps button. Use the File Sharing section
to transfer documents between iPhone and your computer. Apps that support le sharing
appear in the File Sharing Apps list in iTunes. To delete a le, select the le in the Files list, then
press the Delete key.
Security features
Security features help protect the information on iPhone from being accessed by others.
Passcodes and data protection
For security, you can set a passcode that you must enter each time you turn on or wake up
iPhone, or when you access the passcode lock settings.
Setting a passcode turns on data protection, which uses your passcode as the key for encrypting
mail messages and attachments stored on iPhone. (Some apps available from the App Store may
also use data protection.) A notice at the bottom of the Passcode Lock screen in Settings shows
that data protection is enabled.
Important: On an iPhone 3GS that didn’t ship with iOS 4 or later, you must also restore iOS
software to enable data protection. See Updating and restoring iPhone software on page 152.
Set a passcode: Go to Settings > General > Passcode Lock, then tap Turn Passcode On and enter
a 4-digit passcode.
Use a more secure passcode: To increase security, turn o Simple Passcode and use a longer
passcode with a combination of numbers, letters, punctuation, and special characters.
To unlock iPhone when it’s protected by a combination passcode, you enter the passcode using
the keyboard. If you prefer to unlock iPhone using the numeric keypad, you can set up a longer
passcode using numbers only.
Prevent access to Siri when iPhone is locked: Go to Settings > General > Passcode Lock, then
turn Siri o.
Prevent voice dialing when iPhone is locked: Go to Settings > General > Passcode Lock, then
turn Voice Dial o. (Available only when Siri is turned o in Settings > General > Siri.)
See Passcode Lock on page 136 .