[LG Optimus L9 P760, P765, P768, P769] gawrix:
Hi im unlocked bl on v20c in poland site orange

first im install drivers from omap4boot this method

"Follow this thread (link below) to get fastboot working. Then you can get to the next step. I just posted some instructions from that thread below for FYI.

Batch file command is "start_fastboot.bat" not "start-fastboot.bat"

Also,'when the tool says "Wait 5 seconds" don't wait but put the battery in immediately.

http://xdaforums.com/show....php?t=2119090

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What do you need:

omap4boot, get it from original thread.

Extract omap4boot archive somewhere like C:\omap4boot (I will use this path in the tutorial).

Power off your phone and remove the battery.

Connect your phone (still without the battery) to the PC.

You will hear the sound of a new driver, then the sound of a driver when it disconnects continiusly.

Start -> Right click on "Computer" -> "Manage".

On the left column, click on "Device manager".

You will see a device that appear and disappear under "Other/Unknown Devices".

You must right click on the unknown device before it disappear, once clicked select "Driver Update".

Click on the second button (manually install driver) and insert the "usb_drv_windows" path (C:\omap4boot\usb_drv_windows) and install the driver.

Disconnect the phone from the PC and power it off.

Open a command prompt (Win+R, type cmd and press Enter).

Type the following command in the command prompt:

Code:

cd C:\omap4boot

start-fastboot.bat

Now input 3 (Prada 3.0 P940) and press enter.

Plug the phone without battery to the PC, when the tool says "Wait 5 seconds" put the battery in your phone.

(The first time that you do this, you have to install the drivers again. Repeat step 9)

At the other prompts answer always "N", this could be important.

Now you can use fastboot on L9 Next times you can start from step 12.

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AND next steep is

See post number 10 below for some information on fastboot drivers.

1) Connect phone to pc and change USB Mode to "LG Software Mode". Now wait for 30 minutes if you want to unlock bootloader (IMPORTANT Read post) and then open command prompt and give following commands in "lower case" because adb command is case sensitive.

Quote:

C:\>cd \android

C:\Android>adb devices

This should show the list of attached devices in ADB mode like shown below

Now pass this command and phone will restart in fastboot mode like this... in "lower case" because fastboot command is case sensitive.

Quote:

C:Android\>adb reboot oem-unlock

Phone will start in fastboot mode. You may be asked to install fastboot drivers at this point. See driver installation instructions in this thread.

2 A) AT THIS POINT, YOU CAN UNLOCK BOOTLOADER IF STILL LOCKED: You get option to press VOLUME UP key to unlock the bootloader permanently. If already unlocked, skip to next step.

2 B) When your phone comes in fastboot mode, then PC will install fastboot drivers, if not installed before. If automatic installation fails, you can manually install fastboot drivers as instructed in this post. Strangely my device manager shows only one entry like this screenshot. (click for screenshot). If fastboot drivers are not installed this rooting will not work.

3) Now staying in Fastboot mode, install Recovery Software (CWM Touch) like shown below. All in "lower case", because fastboot command is case sensitive and will fail if you type carelessly.

Quote:

C:\Android>fastboot devices

This will show if phone is connected to your pc in fastboot mode or not by showing device entry result like "1234567 fastboot". Then give next command.

Quote:

C:\Android>fastboot flash recovery recovery-clockwork-touch-6.0.3.1-p760.img

This will install Recovery Software (CWM) in your phone. When finished you can disconnect phone from pc (remove usb cable).

To switch off phone, PRESS POWER FOR 15 SECONDS or REMOVE BATTERY and INSERT AGAIN.

4) Reboot phone in Recovery (CWM) Mode (with Vol+ and Home and Power button, all together for 5 secs) and flash UPDATE-SuperSU-v1.25.zip which was already copied before on sdcard. Reboot normally and enjoy.

Your are done.

For me everything went smooth in single attempt like a charm.

PS: The Rom I flashed before did perfectly worked well with all features and options Super Smooth as usual.