LG 160 - Manual (Page 87)

74 Section 2C: Setting Your Phone’s Security
Resetting Default Settings
Resetting the current default settings restores all the factory
defaults, including the ringer types and display settings. The
Contacts, Call History, Scheduler, and Messaging are not
affected.
To reset default settings:
1. Press Menu > Settings > More... > Security, and then
enter your lock code. (The Security menu is displayed.)
2. Select Erase/Reset > Reset All Settings. (A disclaimer
appears.)
3. Read the disclaimer and press .
4. If you are certain that you would like to restore all the
factory settings, select Yes.