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

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cmahendra

Inactive Recognized Contributor
Jan 20, 2012
3,843
4,890
Mumbai
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.
=============================================

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:-


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

attachment.php


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
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.

attachment.php


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.

attachment.php


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
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
attachment.php


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 :D Super Smooth as usual.
==============================================

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

==============================================
 

Attachments

  • UPDATE-SuperSU-v1.25.zip
    1 MB · Views: 16,101
  • recovery-clockwork-touch-6.0.2.9-p760.img
    5.8 MB · Views: 2,292
  • Android.zip
    1.2 MB · Views: 26,681
  • RomManager.jpg
    RomManager.jpg
    44 KB · Views: 5,511
  • Starting-in-Fastboo-mode-from-ADB.jpg
    Starting-in-Fastboo-mode-from-ADB.jpg
    18.7 KB · Views: 247,787
  • SHOWING_OPTION_TO_UNLOCK_BOOTLOADER.jpg
    SHOWING_OPTION_TO_UNLOCK_BOOTLOADER.jpg
    62.9 KB · Views: 172,074
  • CWM-NON-TOUCH.jpg
    CWM-NON-TOUCH.jpg
    80.9 KB · Views: 4,780
  • FASTBOOT_MODE_WITH_UNLOCKED_BOOTLOADER2.jpg
    FASTBOOT_MODE_WITH_UNLOCKED_BOOTLOADER2.jpg
    40.2 KB · Views: 271,860
  • recovery-clockwork-touch-6.0.3.1-p760.img
    5.8 MB · Views: 24,187
Last edited:

cmahendra

Inactive Recognized Contributor
Jan 20, 2012
3,843
4,890
Mumbai
What different between v20b and v20c?

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. :eek: 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? :D I am still exploring and trying to know whats difference :D lol

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?

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.
 

Attachments

  • V20C.jpg
    V20C.jpg
    12.6 KB · Views: 152,676
Last edited:

karthickkatta

Senior Member
Mar 13, 2012
254
44
chennai
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. :eek: 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? :D I am still exploring and trying to know whats difference :D lol



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.
thanks ..but i flashed it succesfully ..another thing i cant see my pics or videos in the player ..what happened and i even did a factory reset ..
 

Manek66

Member
Aug 24, 2010
8
0
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...
 

cmahendra

Inactive Recognized Contributor
Jan 20, 2012
3,843
4,890
Mumbai
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...

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.
 
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Manek66

Member
Aug 24, 2010
8
0
So far, I have found out, that there is different layout when you are answering call and maybe background in SMS app... In question of battery life, its too early to say.
 

rkn989

Senior Member
Apr 2, 2013
191
15
GodsOwnCountry
command write failed unknown error

1) As usually I do, P760V20C Europe Open was out so flashed it on P765 India. :good:

Then started phone in fastboot mode with following...

attachment.php


In fastboot mode my device manager show only one entry like this screenshot. (click for screenshot).

attachment.php

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:
 
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cmahendra

Inactive Recognized Contributor
Jan 20, 2012
3,843
4,890
Mumbai
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:

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.

picture.php
 
Last edited:

rkn989

Senior Member
Apr 2, 2013
191
15
GodsOwnCountry
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 include perfect FASTBOOT drivers too. Worked always for me.

picture.php


i din install them ... it was automatically installed .. im using win8 pro 32 bit .... and my phone is rooted by lelus method which yu posted ... and now its running p760 v20b ROM ....
 

Techgod

Senior Member
Aug 19, 2009
625
158
31
Mumbai
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.

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
 

cmahendra

Inactive Recognized Contributor
Jan 20, 2012
3,843
4,890
Mumbai
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

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.
 
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mylk

Senior Member
Apr 10, 2013
58
6
33
shenyang
==============================================

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

==============================================


*** THIS IS NOT GUIDE, Just sharing. Just telling all noob-pals, that how easy it is to flash+CWM+Root V20D on Unlocked Bootloader (UL BL)***

I have P765 with UL BL :) and was on P760 V20D Europe.

1) As usually I do, P765V20D HongKong was out so flashed it on P765 India. :good:

Then started phone in fastboot mode with following...

attachment.php


In fastboot mode my device manager show only one entry like this screenshot. (click for screenshot).

2) In Fastboot mode, pushed CWM Touch like following.:good:

C:\Android>fastboot flash recovery recovery-clockwork-touch-6.0.2.9-p760.img

attachment.php


3) Rebooted in CWM Mode and flashed UPDATE-SuperSU-v1.25.zip:good:

Everything went smooth in single attempt like a charm

Rom is Perfectly fine with all features and options :D Super Smooth as usual.


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.
 

cmahendra

Inactive Recognized Contributor
Jan 20, 2012
3,843
4,890
Mumbai
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.

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.
 

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  • 28
    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.
    =============================================

    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:-


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

    attachment.php


    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
    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.

    attachment.php


    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.

    attachment.php


    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
    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
    attachment.php


    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 :D Super Smooth as usual.
    ==============================================

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

    ==============================================
    3
    @cmahendra Can u add few lines in your OP like on which firmware bootloader can be locked? This might prevent some same questions from repeating in the thread and might help out others. I tried unlocking on p765 v20B, v20C & v20D all unsuccessful. I unlocked on v20A Indian in just 20min. So, may be this info might be helpful to others :highfive:
    2
    U2 is l9s motherboard model name

    Thanks a lot. That clears fog. He was mentioning in other thread also why it is showing as U2 instead of P768? lol
    2
    For those advanced users , especially p765 and p768 who are on jb and can not unlock their bootloader I can suggest backing up then flashing x-loader and u-boot that cmahendra provided and see if unlocking works
    also restoring via offline method or lg tool may overwrite x and u, I haven't notice any patterns which kdz version does it or not , it most likely is set in kdz/dll itself.
    2
    Hello,

    I did this tutorial on my P760 and it works perfectly :highfive: (the only difference I made was for the recovery file, I used the last version 6.0.3.1 instead of the on given on this thread :) ).

    There was only one detail I didn't understand. When you are asked to confirm with Vol+ if you are sure to unlock the bootloader, it said it will reset your device to factory settings : it did not :D .

    Thank you for the tutorial ;)

    Glad this Tutorial helped you. :highfive: I know I am on same new CWM 6.0.3.1 but not updated here. kindaa lazy. JUST UPDATED NEW CWM. Old also there for backup.:D

    They said it will reset your device, because people are lazy/careless to BACKUP the phone. Even I keep telling people to take nandroid backup of phone before flashing KDZ but it does not wipe data. :D

    See last line of my signature. :D