LG Ally User Manual page 252

Settings
250
Development screen
The Development screen contains settings that are useful for
developing Android TM applications. For full information, including
documentation of the Android APIs and development tools, see
the Android developer web site (http://developer.android.com).
USB debugging Permits debugging tools on a computer to
communicate with your phone via a USB connection.
Stay awake Allows you to set the phone to prevent the screen
from dimming and locking when it is connected to a charger or to
a USB device that provides power. Don't use this setting with a
static image on the phone for long periods of time, or the screen
may be marked with that image.
Allow mock locations Permits a development tool on a computer
to control where the phone believes it is located, rather than using
the phone's own internal tools for this purpose.