Uninstall the applications provided by the company Possible Duplicate:
  How can I uninstall applications that are locked by phone vendor?  




I am using the LG P500 phone, running Android 2.3 (Gingerbread).

I want to uninstall the applications provided by the operating system distribution, that is, the default applications. Is there a way to do this?
System apps are stored in the /system/ partition. You can only uninstall them if your device is rooted (see: How do I root my Android device?).

Preinstalled software are most likely system apps, so if you can't uninstall them through the Settings menu there is probably no other way than rooting.