User Guide

Chapter 3 Basics 44
Erase data after ten failed passcode attempts. Go to Settings > Touch ID & Passcode (iPhone
models with Touch ID) or Settings > Passcode (other models), then tap Erase Data. After ten
failed passcode attempts, all settings are reset, and all your information and media are erased by
removing the encryption key to the data.
If you forget your passcode, you must restore the iPhone software. See Restore iPhone on page 174.
Touch ID sensor
On iPhone models with Touch ID, you can use a ngerprint instead of your passcode to unlock
iPhone, or make purchases from the iTunes Store, App Store, and iBooks Store.
Set up the Touch ID sensor. Go to Settings > Touch ID & Passcode. Set whether you want to use
a ngerprint to unlock iPhone, and to make purchases. Tap Add a Fingerprint, then follow the
onscreen instructions. You can add more than one ngerprint (your thumb and forenger, for
example, or one for your spouse).
Delete a ngerprint. Tap the ngerprint, then tap Delete Fingerprint. If you have more than one
ngerprint, touch the Home button to nd out which ngerprint it is.
Name a ngerprint. Tap the ngerprint, then enter a name, such as “Thumb.”
Use the Touch ID sensor to unlock iPhone. Touch the Home button with a nger you’ve added
in Settings. You can unlock iPhone from either the Lock screen or the Passcode screen.
Note: If you turn iPhone o, you’ll be asked to conrm your passcode when you turn iPhone
back on and unlock it the rst time, and you’ll be asked for your Apple ID password for the rst
purchase you make.
iCloud Keychain
iCloud Keychain keeps your Safari website user names and passwords, credit card information,
and Wi-Fi network information up to date. iCloud Keychain works on all your approved devices
(iOS 7 or later) and Mac computers (OS X Mavericks or later).
iCloud Keychain works with Safari Password Generator and AutoFill. When you’re setting up a
new account, Safari Password Generator suggests unique, hard-to-guess passwords. You can use
AutoFill to have iPhone enter your user name and password info, making login easy. See Fill in
forms on page 64.
Note: Some websites do not support AutoFill.
iCloud Keychain is secured with 256-bit AES encryption during storage and transmission, and
cannot be read by Apple.
Set up iCloud Keychain. Go to Settings > iCloud > Keychain. Turn on iCloud Keychain, then
follow the onscreen instructions. If you’ve set up iCloud Keychain on other devices, you need to
approve use of iCloud Keychain from one of those devices, or use your iCloud Security Code.
Important: If you forget your iCloud Security Code, you’ll have to start over and set up your
iCloud Keychain again.
Set up AutoFill. Go to Settings > Safari > Passwords & AutoFill. Make sure Names and Passwords, and
Credit Cards, are turned on (they’re on by default). To add credit card info, tap Saved Credit Cards.
The security code for your credit card is not saved—you have to enter that manually.
To automatically ll in names, passwords, or credit card info on sites that support it, tap a text
eld, then tap AutoFill.
To protect your personal information, set a passcode if you turn on iCloud Keychain and AutoFill.