User Guide

You can turn Location Services o if you don’t want to use this feature. If you turn
Location Services o, you’ll be prompted to turn it back on again the next time an
application tries to use this feature.
Turn Location Services on or o: Choose General > Location Services and turn
location services on or o.
To conserve battery life, turn Location Services o when you’re not using it.
Auto-Lock
Locking iPhone turns o the display to save your battery and to prevent unintended
operation of iPhone. You can still receive calls and text messages, and you can adjust
the volume and use the mic button on the iPhone stereo headset when listening to
music or on a call.
Set the amount of time before iPhone locks: Choose General > Auto-Lock and
choose a time.
Passcode Lock
By default, iPhone doesn’t require you to enter a passcode to unlock it.
Set a passcode: Choose General > Passcode Lock and enter a 4-digit passcode, then
enter the passcode again to verify it. iPhone then requires you to enter the passcode
to unlock it.
Turn passcode lock o: Choose General > Passcode Lock and tap Turn Passcode O,
then enter your passcode.
Change the passcode: Choose General > Passcode Lock and tap Change Passcode,
enter your current passcode, then enter and reenter your new passcode.
If you forget your passcode, you must restore the iPhone software. See “Updating and
Restoring iPhone Software” on page 142.
Set how long before your passcode is required: Choose General > Passcode Lock >
Require Passcode, then select how long iPhone can be idle before you need to enter a
passcode to unlock it.
Show SMS Preview when iPhone is locked: Choose General > Passcode Lock and tap
to turn SMS preview on.
Erase data after ten failed passcode attempts: Choose General > Passcode Lock and
tap Erase Data to turn it on.
After ten failed passcode attempts, your settings are reset to their defaults and all your
information and media on your iPhone is removed by overwriting the data stored on
iPhone.
108 Chapter 8 Settings