I have a good news for LG Optimus L9 P760/P765/P768/P769 owners that after countless hours of searching on internet, finally I found the way to unlock bootloader on the device.
Instructions for unlocking Bootloader on LG Optimus L9
If you want to install CWM recovery:
If you want to root the LG Optimus L9 Jelly Bean:
Credits to markolino631
Caution: This guide has confirmed that it is working on LG Optimus L9 P760/P765. Again, do this at your own risk.
LG Optimus L9 Phone Photos – LG Cell Phone Pictures
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I got: Error: Can not load “recovery.img”
LINKS NOT WORKING!
My lg p760 just reboot in system help….