[2in1GUIDE][JB] Unlock Bootloader and FASTER Root L9 Method

WARNING

• USE INFORMATION AT YOU OWN RISK
• There is no known perfect method to RELOCK the bootloader. So beware you will loose warranty of device. This warning is also shown while unlocking by LG.
  
• This guide may have errors and may not work for some in various scenario. If you report them, I may try to correct them.
  
• Read properly and DON'T SEND PM, I will simply ignore PM and laugh on you.

Just sharing information. See now how easy it is to flash+CWM+Root V20* on Unlocked Bootloader (UL BL)***

Thanks and Huge rounds of applause for Aremcee (aka RC or Ricardo Cerqueira).
This is completely based on Aremcee's Unlock and CWMRoot method as explained here. Please read is carefully before starting.
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Things to remember while proceeding.

• Not for Newbies. (need some experience in flashing and installing fastboot drivers)
  .
• 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 20min.
  .
• You must have P768 with P768 JB (e.g.Mexico) Not tested but should work as per JB feature added in other variants. If this method does not work for P768 then try this method.
• Phone might be already Bootloader Unlocked or you may Unlock it while in following process.
• P769x owners please visit this thread for unlocking bootloader.

Unlock Bootloader and Easy Rooting of L9 P760/765/P768

0) Preparations:-

• Install latest LG Driver.
• Download fastbootdrivers.zip (old) OR New Fastbood Drivers and find installation instructions in this thread OR this new thread (Tip for Win98)
• Download Android.zip and extracted anywhere on computer, preferably C drive. The folder "C:\Android" will be created with all necessary files.
• Download recovery-clockwork-touch-6.0.3.1-p760.img and save in "C:\Android" folder
• Download UPDATE-SuperSU-v1.25.zip and save on external sdcard.

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.

C:\>cd \android
C:\Android>adb devices

Click to expand...

Click to collapse

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.

C:Android\>adb reboot oem-unlock

Click to expand...

Click to collapse

Phone will start in fastboot mode. You may be asked to install fastboot drivers at this point. See driver download from this this NEW download thread and install with instructions from this OLD install method or this New install Method.

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 or 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.

C:\Android>fastboot devices

Click to expand...

Click to collapse

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.

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

Click to expand...

Click to collapse

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.
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EDIT: JUST FLASHED P765 V20D HongKong ON P765 INDIA WITH NO ISSUE. (14-Apr-13) See this related thread for more information

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hkfree said:

What different between v20b and v20c?

Click to expand...

Click to collapse

Not much. Everything seem same as V20B. Could be some minor unknown changes/bugfixes in the deep inside rom, which we may not want to know. But ROM is solid good and function well.

Actually at the moment, there is no solid reason with me for, why one should update to V20C? I am still exploring and trying to know whats difference lol

karthickkatta said:

i have unlocked boot loader and when i try to flash kdz it shows no device foun ...i have installed the drives correctly..or can you give me the cwm backup?

Click to expand...

Click to collapse

I wanted to but I have pathetic upload speed right now and it will take around 8/9 hours to upload 550+ mb CWM Backup. Practical not possible for me
Please wait for someone with FASTER upload speed.

Manek66 said:

Couldn`t it improve battery life? For me on stock v20b with root is impossible stand more than 17 hours. Another thing whats bother me is wake up time from sleeping. When i press home or wake up button, it takes about 2 or 3 seconds to switch on display!!! And i didn´t change any frequencies or governor. I didn´t notice that problem on v10h ICS...

Click to expand...

Click to collapse

Now its almost two days and approximately I got 1 and half day in single charge with moderate use. For me V20C is really better than V20B. Of course i use music and video very very less and mostly its for call and emails on 3G data.
Camera clarity is same (poor) as V20B but flash brightness is better than it.

rkn989 said:

in this step yu have mentioned, can yu tell me the driver installed for the usb device connected in the screenshot - for me in the device manager it shows as some asus driver installed ... i guess maybe this is the reason for that command write failed error :crying:

Click to expand...

Click to collapse

Asus? From where did you get that? Strange.

I am not sure right now, but these drivers problems are not occurring to me after I have installed Android SDK Tools (long time back) and installed original Google USB driver from Google Android Developers. See what items are installed in following image. And I think the platform tools and Google USB Drivers include FASTBOOT drivers too. Worked always for me.

Techgod said:

Is hindi present in European firmware? ??

Sent from my LG-P765 using xda app-developers app

Click to expand...

Click to collapse

There is no hindi OS support even in Indian version of ROMs. You cannot select interface language in hindi.

But you can read hindi/gujrathi/etc in apps like facebook in European roms too. All fonts are built in roms folder.

Techgod said:

I meant hindi font rendering in messages and other apps....like reading ओप्टीमस in European firmware..

thnx a lot....i dont want the os in hindi.

Sent from my LG-P765 using xda app-developers app

Click to expand...

Click to collapse

Then yes, have read hindi in european roms also. I only have seen hindi text in SMS several times but the text appears bit erroneous. But in Facebook the text appears perfect like we see in pc. I dont know may be Facebook installs its own Hindi TTF font.

FLASHED P765 V20D HongKong ON P765 INDIA WITH NO ISSUE. (14-Apr-13) See this related thread for more information

mylk said:

i have read your thread about lelus method of rooting L9。now i want to flash V20D version of Hongkong on my p765. but the recovery is needed in your thread,but i cant find it in another thread. so i just wonder whether your Attached File of “recovery-clockwork-touch-6.0.2.9-p760.img” can be used on mine.

Click to expand...

Click to collapse

Yes, only two files attached here are enough. Remember this procedure is only for unlocked bootloader, which does not need lelus method to be performed.

PS: You will need flashing tool for flashing rom and fastboot files, available in other threads. You can get fastboot files in Android SDK Tool package.