Chapter 8 Settings 105
iPhone can connect to VPNs that use the L2TP, PPTP, or Cisco IPSec protocols. VPN
works over both Wi-Fi and cellular data network connections.
Ask your network administrator which settings to use. In most cases, if you’ve set up
VPN on your computer, you can use the same VPN settings for iPhone.
Once you’ve entered VPN settings, a VPN switch appears at the top level of the
Settings menu that you can use to turn VPN on or off.
Change a VPN configuration: Choose General > Network > VPN and tap the
configuration you want to update.
Turn VPN on or off: Tap Settings and turn VPN on or off.
Delete a VPN configuration: Choose General > Network > VPN, tap the blue arrow
to the right of the configuration name, and tap Delete VPN at the bottom of the
configuration screen.
Use Wi-Fi: See “Wi-Fi” on page 100.
Bluetooth
iPhone can connect wirelessly to Bluetooth headsets and car kits for hands-free
talking. See “Bluetooth Devices” on page 43.
Turn Bluetooth on or off: Choose General > Bluetooth and turn Bluetooth on or off.
Location Services
Location Services allows applications such as Maps and Camera to gather and use
data indicating your location. Location Services does not correlate the data it collects
with your personally identifiable information. Your approximate location is determined
using available information from cellular network data, local Wi-Fi networks (if you
have Wi-Fi turned on), and GPS (if you have an iPhone 3G; GPS not available in all
locations).
You can turn Location Services off if you don’t want to use this feature. If you turn
Location Services off, 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 off: Choose General > Location Services and turn
location services on or off.
To conserve battery life, turn Location Services off when you’re not using it.
Auto-Lock
Locking iPhone turns off 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.