LG LGP999 - Manual (Page 67)

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Screen timeout – Allows you to adjust the delay time before the screen
automatically turns off. For the best battery performance, use the shortest
convenient timeout.
Location & security
This menu allows you to configure your phone’s location and security
settings.
< My Location >
Use wireless networks – If you select Use wireless networks, your phone
will determine your approximate location by using Wi-Fi and mobile
networks.
Use GPS satellites – If you select Use GPS satellites, your phone will be
determine your location to street-level accuracy.
< Screen unlock>
Set up screen lock – Allows you to set an unlock pattern to secure your
phone. Choosing Pattern opens a set of screens that guide you through
drawing a screen unlock pattern. You can also set a PIN or Password
instead of Pattern or leave it as None.