Guide to Unlocked Bootloader (ULBL) of LG L9 P760/P765 and other variants.
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Things to remember while proceeding.
- IMPORTANT: You must have P760/P765 with P760 V20B EUROPE OPEN rom flashed on it ....or OTHER UNLOCKABLE ROMS. @Gh0sT.RPG tried unlocking on P765 V20B, V20C & V20D all unsuccessful. But He unlocked on P65 V20A Indian in just few mins.
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How to Unlock Bootloader and do Easy Rooting of L9 P760/765/P768
Step 1) Preparations:-
- Download and Install latest LG Driver on Computer (This is for ADB drivers).
- Download and extract Android.zip on computer, preferably D drive. The folder "C:\Android" will be automatically created with all necessary files. (You can use D drive also in case of problems saving or running on C drive on Windows 8 or 8.1
- In Settings >>> Developer Options >>> Select check mark on for "USB Debugging Mode"
- In Settings >>> Security >>> Select check mark on for "Unknown Resources"
Step 2) ADB Mode Connection:-
Now connect phone to pc with USB cable and change USB Mode to "LG Software Mode". Now your windows will install drivers and in Device Manager you will see following ADB PORT entry "USB Modem Phone ADB Port" (or some other words with name ADB).
Step 3)
Now wait for 30 minutes if you want to unlock bootloader (IMPORTANT Read post) and then open "
Command Prompt" and give following commands in windows command prompt.
This should show the list of attached devices in ADB mode like shown below.
Step 4)
Now pass this command in "
lower case" only because adb commands are
case sensitive.
Phone will restart in pre-fastboot mode.
AT THIS POINT, YOU WILL UNLOCK BOOTLOADER:
You will get two options and to select UNLOCK you need to press VOLUME UP key which will unlock the bootloader permanently and when you press VOLUME UP key your phone is UNLOCKED and phone will go in FastBoot mode.
(*Sorry no screenshot available of these two options. Second option is something else I don't remember now, but forget it.)
Once unlocked this Unlock options screen will never show up in future.
Now you will see
"Fast Boot mode" screen like shown below.
But you don's have to do anything in Fastboot mode so just Remove USB cable. Remove battery and reinsert battery and you may start phone normally.
You are done! Your LG L9 is now with Unlocked Bootloader.
For more information you can visit my old Guide made for same purpose here
http://xdaforums.com/showthread.php?t=2221102