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98 Chapter 8 Settings
Set whether iPhone shows 24-hour time or 12-hour time
m Choose General > Date & Time and turn 24-Hour Time on or off.
Set whether iPhone sets the date and time automatically
m Choose General > Date & Time and turn Set Automatically on or off.
If iPhone is set to update the time automatically, it gets the correct time over the cell
network, and updates it for the time zone you’re in.
Set the time manually
m Choose General > Date & Time and turn Set Automatically off. Then enter a time zone,
date, and time.
Turn on Calendar time zone support
m Choose General > Date & Time and turn Time Zone Support on. When Time Zone
Support is on, Calendar displays event dates and times in the time zone set for your
calendars. When Time Zone Support is off, Calendar displays events in the time zone of
your current location.
Auto-Lock
Locking iPhone turns off the display. Nothing happens if you touch the screen. 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
m 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
m Choose General > Passcode Lock and enter a 4-digit passcode. iPhone then requires
you to enter the passcode to unlock it.
Turn passcode lock off or change the passcode
m Choose General > Passcode Lock and tap Turn Passcode Off or Change Passcode,
then enter the current passcode.
If you forget your passcode, you must restore the iPhone software. See page 114.
VPN
VPNs (virtual private networks) are often used within organizations to allow you to
communicate private information securely over a non-private network. Your may need
to configure VPN, for example, to access your work email on iPhone.
iPhone can connect to VPNs that use the L2TP or PPTP protocol. VPN works over both
Wi-Fi and EDGE network connections.