Flash Original Firmware LG Optimus One P500

Files needed:

Driver LG P500 can get it from LG P500 Driver from LG, or from mediafire
KDZ Updater software for update flashing, can get from KDZ Updater
choose your firmware which you want to update, example firmware v10c singapore
after you get material, now do this for preparation:extract KDZupdater and install in windows
install the driver >>restart your PC, and disable LGE Virtual Modem by:

How to Root LG Optimus One with z4root

Steps to root LG Optimus One:download z4root app from android market, or you can get from here
copy to SD card then install using file manager
run z4root app then select permanent root
wait a minut... the it will reboot
after rooted, now busybox and superuser has installed

firmware v10e cannot rooted by this way, so check your optimus by home -> setting -> about phone -> software version

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