LG GD910 User Manual page 328

Settings
Power save - Change the factory-set power saving
settings: Off, night only or Always on.
Languages - Change the language on your gD910
display.
Security - Adjust your security settings, including Pin
codes handset lock and change codes.
NOTE: Security code
The default security code is set to '0000' and the security
code is required to delete all phone entries and to activate the
Reset settings menu. The security code default setting can be
modified from the security > Change codes.
Voice command - select the voice command feature
enable or disable.
Memory manager - Use the memory manager to
determine how each memory is used and how much
space is available.
- Handset common memory - View the memory
available on your gD910 for Pictures, sounds and
other items.
- Handset reserved memory - View the memory
available on your handset for sMs, Contacts, Calendar,
the To-do lists, Memos, Alarms and Call history.
- USIM memory - View the memory available on your
UsiM Card.
Reset settings - Restores all settings to the factory
defaults.
Information - View the handset information and the
Phone guide for your gD910.
 LG GD910 | User Guide