yashsingh1/xdaforums huggingface dataset:
[LG Optimus L9 P760, P765, P768, P769] artit:
If you boot your phone to s/w update mode it should show at top of the screen that your bootloader is unlock. If you're lucky and did all things correctly.
[LG Optimus L9 P760, P765, P768, P769] Swag-Mo:
help is desperately needed...:(

i failed horribly at my attempt flash a kdz file... the B2CAppClient just wont download the LGMobileSupportTool as it should. I have now sent my phone in for repairs at the Vodacom store here at Menlyn, lol, the suckers diagnosed the problem as a faulty battery and are replacing that and flashing new software for me.

my question is now, hoping that the software returns to ics, would it be easier for me to proceed with unlocking my P768 on ics firmware. is there a simpler technique. is the bootloader unlockable then?

i have totally given up on the offline method but i desperately wanna unlock my bootloader and start flashing customs as i always have on Android. it is what makes it all interedting after all PLS HELP....
[LG Optimus L9 P760, P765, P768, P769] shucrut:
Until now as far as i know, you can't unlock the bootloader in ics firmware. If you want to unlock the bootloader you must learn the offline flashing method, so you can install the 20B/C open firmware (or another unlockable one). If you have any problems in flashing, pot here, i'm sure me or someone else will be happy to help you.
[LG Optimus L9 P760, P765, P768, P769] Swag-Mo:
i have been struggling to install the B2CAppClient becausethe LGMobileSupportTool wont install as it should.. the app crashes ass soon as i open the B2CAppClient setup exe file.. attached below is a snapshot of the error that pops up when i try to install the SupportTool.

I am running Windows 7 home premium 64bit edition. thanks will be greatly appreciated.

coming from the HTC Desire and Desire S forums, it has taken a while to adjust to the new hardware and how it operates but im always up for a new challenge and would love to finally solve this puzzle and free my phone from stock restrictions.

CM waits patiently for me...:P
[LG Optimus L9 P760, P765, P768, P769] kuma82:
It sounds like your windows system is the problem, I've noticed you have quite of bit of stuff opened up.
[LG Optimus L9 P760, P765, P768, P769] Swag-Mo:
what may be the problem with my system?

that screenshot was only taken to show that i am doing everything correctly. i have attempted to perform the task with no other applications running but to no avail anyway..
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Have you tried downloading everything again? Have you tried on another computer? Are you running the program in xp compatibly mode? You may have issue with your system that is causing it to crash (maybe a conflict with another program) if it works fine on mine and others, then it has to be your windows.
[LG Optimus L9 P760, P765, P768, P769] lordairdog:
P768 discovery

FOR P768 users having difficulty unlocking their bootloaders... try to install Fastboot on your L9 using P760 method..

I discovered that while I was messin' with my phone while trying to unlock it's bootloader...
[LG Optimus L9 P760, P765, P768, P769] Swag-Mo:
would this bypass having to flash P760 kdz... therefore enabling unlocking of the P768 bootloader?

and could you please post a link to the relevant link for resources on how to perform such.
[LG Optimus L9 P760, P765, P768, P769] shucrut:
Instead of using "UpTestEX_mod2_marwin.exe" to flash the 10A/20B/20C roms, try using the "KDZ_FW_UPD.exe"

You need to delete the file "mfc42.dll", found in the folder of the .exe i told you above

Do only the steps i say here, do not modify hosts file or whatever

So, heres the following:

1. Navigate to where your KDZ OFFLINE FLASH stuff are

2. Delete mfc42.dll

3. Right click on KDZ_FW_UPD.exe, enable compatibility with windows xp sp3 and check the box to run as administrator

4. Do the same with Windows Enabler.exe

5. Open Windows Enabler.exe

6. You should see a new icon in system tray (if don't, click in the arrow close to the clock)

7. Normal click in Windows Enabler.exe icon, you should see a "On" in this icon now

8. Download fastboot stuff (http://xdaforums.com/showthread.php?p=42293552)

9. You need to install fastboot drivers (http://xdaforums.com/showpost.php?p=44653501&postcount=55)

10. Once the fastboot drivers are installed (to be sure, remove battery, open the fastboot .bat, select fastboot, connect usb cable and re-insert the battery and then navigate to fastboot/bin folder, open a cmd there - Shift + right click>Open a command window here - and issue the command fastboot devices, you should see a line with numbers and letters, if so, the drivers installed correctly)

11. Install your phone's xloader and uboot with fastboot .bat

12. Remove the battery, Re-insert the battery, connect usb cable and hold Vol +, you should see the SW Update screen

13. Open KDZ_FW_UPD.exe, select 3GQCT, select EMERGENCY and select the KDZ you want to flash

14. Now click in Launch software update and wait until finish

:D
[LG Optimus L9 P760, P765, P768, P769] bahram360:
help

hi

i want unlock bootloader l9 p768 But I do not have WiFi

do i can to unlock bootloader?

sorry for my bad english
[LG Optimus L9 P760, P765, P768, P769] bahram360:
No one could answer me?:mad:
[LG Optimus L9 P760, P765, P768, P769] donk165:
Hi there, im unsure as to what the internet connection does during the bootloader unlock procedure, i assume mobile data would work the same, just make sure you have a good connection with data.

Good luck!
[LG Optimus L9 P760, P765, P768, P769] bahram360:
Sorry my friend will unlock bootloader the SIM 2G card via GPRS can be online in 30 minutes ?
[LG Optimus L9 P760, P765, P768, P769] UNForces:
Thanks I had some troubles with unlocking the bootloader but now everything is fine. :)
[LG Optimus L9 P760, P765, P768, P769] bahram360:
Pls Help

Hi

i flashed rom europe p760 20b and unlocked bootloader after this work i flashed rom special p768 20a but now want inter to fastboot for flash cwm dont inter to fastboot only phone restart.

Plz help

sorry for my bad english
[LG Optimus L9 P760, P765, P768, P769] artit:
You cannot use "adb reboot oem-unlock" to boot P768 ROM to fastboot mode. Read about how to fast boot P768 in this thread http://xdaforums.com/showthread.php?t=2292828 and http://xdaforums.com/showthread.php?t=2313794 (in Installing CWM Recovery with Fastboot section)

edit:

In P768 fastboot mode, phone screen always blank/black. Try to listen to driver/usb connect and disconnect sound, and use fastboot devices command to check if your phone enter fastboot or not.
[LG Optimus L9 P760, P765, P768, P769] shucrut:
I have a question: I have a P768, if i flash xloader and uboot from P760 JB, should my phone be recognized by kdz offline flashing? Cause everytime i tried this, my phone was not recognized by kdz flashing and need to flash xloader and uboot for P768 ICS
[LG Optimus L9 P760, P765, P768, P769] Meda808:
wrong thread
[LG Optimus L9 P760, P765, P768, P769] bahram360:
why

why dont setup fastboot driver in device manager.i not see lg p2 in other devices only see omap and i update Manual.i via command inter fastboot devices but phone does not.:crying:

screen shot

device manager

number 1 batch file

number 6 batch file
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Take your USB cable out of your PC and put it back in, or put it into another port.
[LG Optimus L9 P760, P765, P768, P769] bahram360:
hey kuma82 i put it into another port but not inter to fastboot.

pls help my phone is bootloader unlocked but not setup recovery.
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Do you see the invert fastboot at any time pop up?
[LG Optimus L9 P760, P765, P768, P769] bahram360:
I do not understand.I 'm not good English my language is Persian.Please tell Easier.
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Do you see anything on your screen when you try to use lelus fastboot? You are not putting the battery back in fast enough. Don't wait 4 seconds, put battery in right away (fast). Wait 1 second put battery in.
[LG Optimus L9 P760, P765, P768, P769] bahram360:
hoora Thanks to my friend kuma82 fastboot driver is installed in device manager. now i must via ADB_and_Recovery_Images-P768 flash recovery It is true?
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Do you have the cwm image? Put cwm.img in "yours" folder. Run lelus fastboot, select #1

then type

fastboot flash recovery cwm.img

Or just use this

http://xdaforums.com/showthread.php?p=45299506
[LG Optimus L9 P760, P765, P768, P769] bahram360:
hooooora i can flashed (recovery-clockwork-touch-6.0.3.1-p760) via LG.Optimus.L9.toolkit.v1.2 in fastboot.:laugh::D
[LG Optimus L9 P760, P765, P768, P769] shahil229:
Hi

After i flashed my p768 with the Europe open V20b and unlocked the bootloader and then flashed it back to its stock South African V20a the bootloader status changed back to locked. I dont think i did anything wrong but could someone please help me out?

Thanks
[LG Optimus L9 P760, P765, P768, P769] donk165:
Hi there,

The bootloader status may display as locked when you switch back to the p768 firmware because that software doesn't support boot loader unlocking. Have you tried using software update mode to check if it has actually relocked the bootloader? As far as I know, it doesn't relock.

To get into software update mode, switch off the phone and wait 15 secs, then hold the Volume + button and connect a USB data cable.
[LG Optimus L9 P760, P765, P768, P769] donk165:
Im going to update the OP in the next few days to include how to install CM10.1/10.2 or Jelly Cream and add steps in if needs be. Also going to add TWRP recovery to the recoveries ZIP
[LG Optimus L9 P760, P765, P768, P769] aliajami:
This is the best guide i've seen no doubt about it. I got my p768 unlocked then tried CM for couple of days.

But after i flashed back to original JB the camera had some problems.. with dark and low quality images.

Does flashing the p760 brick the phone ?

If theres is a solution to my camera plz tell me i dont wnt to brick the phone
[LG Optimus L9 P760, P765, P768, P769] artit:
I didn't get that problem after flash P760 kdz. You're the first person that got camera problem after flash 760 kdz until now. I'm not sure what's your problem, It seem hardware problem. Did you try to install custom rom to see if your camera picture also dark and low quality?

And if you are on stock P768 rom, there's hidden menu that have some phone testing routines in it. Try 3845#*768# and test it. I didn't try it so I'm not sure it'll give you useful information.
[LG Optimus L9 P760, P765, P768, P769] donk165:
Yeah, after flashing from P760 and then back to P768 ROM, there should be no ill effects unless when you flashed back to stock JB, you flashed another P760 KDZ?

I haven't had any other reports of this happening? When you flashed stock JB, did you try a full hard reset? Maybe some settings remained from previous version?

Also, which CM version did you try? Maybe there is a bug?
[LG Optimus L9 P760, P765, P768, P769] donk165:
OP cleaned up for errors. Thread is now stickied for easy access.
[LG Optimus L9 P760, P765, P768, P769] jaskooo:
installed v20c firmware, waited 30 min on wifi and phone just reboot when adb command for unlock is applied,any suggestions ??
[LG Optimus L9 P760, P765, P768, P769] artit:
Try to put your phone in LG software mode and try again.

Good luck.
[LG Optimus L9 P760, P765, P768, P769] shahil229:
Uninstall Cyanogenmod

Hey...I was just wondering how would i uninstall cyanogenmod and reinstall the stock rom? ...Do I just use the KDZ flash?

Thanks
[LG Optimus L9 P760, P765, P768, P769] jaskooo:
Not working, i tried software mode and charging only mode,still phone just rebooting
[LG Optimus L9 P760, P765, P768, P769] jaskooo:
Finally completed

This worked 4 me

install official ADB from google, and register adb shell in windows PATH dont use other adb or fastboot files

flash V10a europe open, make factory reset, tick android usb debugging and connect in lg software mode

then flash V20b europe open, connect via wifi and leave usb cable plugged on, and connect in lg software mode

DONT REBOOT PHONE, leave it as is on first booting, about 30 min

then use adb reboot oem-unlock, and voilla, fastboot is here

Then use instructions in first post in this thread
[LG Optimus L9 P760, P765, P768, P769] Cesarvzla:
Is there any other way to unlock bootloader.? Couse I try the first step which is downloading the European open kdz and I get this error, I got message on my phone so posted this screenshot. Please help I really wanna flash Pacman
[LG Optimus L9 P760, P765, P768, P769] Cesarvzla:
Does it have to be a European open kdz or does any P760 20B version work?
[LG Optimus L9 P760, P765, P768, P769] jaskooo:
U must use open euro roms

V10a - link

V20b - link

Drivers and fastboot - link

tutorial - use google translate - link

it worked 4 me

:D

Enjoy
[LG Optimus L9 P760, P765, P768, P769] zenki1:
i did the recovery installation serveral times but it still not work for me, when i flash P768 rom again i can not boot into fastboot mod in P768 rom ( bootloader unlocked ), i did exactly each word you type but nothing happen , when i put battery in it just charge...what to do now ? @@ sorry my bad english
[LG Optimus L9 P760, P765, P768, P769] DarwinDeLaRosa:
Grcias! was very helpful throughout! well explained! that day I buy you a beer
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
the bottom part of the fastboot screen that looks bad stayed printed, now when its booting, and even inside the rom...basically everywhere. Idk how else to describe it lol..any help fixing this?

im trying to take a picture of it, but it wont actually capture it :confused:
[LG Optimus L9 P760, P765, P768, P769] artit:
What did you do with your phone before you get that? Maybe flash your original kdz solve it.
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
IS The Rom LGp760 V20H Unlockable?
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
can someone help me?

I flash p760 V20H on my phone p768 V20b and want to unlock bootloader.I stay in step 4,5.

please help me...:crying::crying::crying:
[LG Optimus L9 P760, P765, P768, P769] artit:
If you flash Europe Open V20H, I think it is unlockable. Did you wait more than 30 minutes with wifi and mobile signal on? And what's the error or result you get after entering adn reboot oem-unlock ?
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
yes.I wait more than 30 minutes.when type adb devices,show me " adb is not recognized as a internal or external command".

my windows is Xp.
[LG Optimus L9 P760, P765, P768, P769] artit:
4. Extract 'ADB_and_Recovery_Images-P768.rar'. Navigate to where 'adb.exe' is stored on your pc and open a command line (Shift + Right Click in Windows Explorer.

That's what you should do. Please make sure that you open command prompt and current directory is where you extract that zip content. adb.exe is in that zip.
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
where is the link ADB_and_Recovery_Images-P768.rar' ???
[LG Optimus L9 P760, P765, P768, P769] artit:
Maybe it's here (in OP)

Fastboot Package (see attachment of 1st post)

ADB + Fastboot Package

I'm not which to use but file name is not state in OP. BTW it has adb and fastboot.
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
I download that file but not exist any adb.zip.
[LG Optimus L9 P760, P765, P768, P769] artit:
fastboot.zip, extract it and look for adb.exe in bin folder
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
thank you very much.I unlock bootloader.
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
I unlock bootloader and Install Recovery then flash jelly cream v1 custom rom but now my phone stay in Lg LOGO and dont boot.

please help me...

sorry about my bad english.
[LG Optimus L9 P760, P765, P768, P769] artit:
That seem like something strange in that rom kernel config. You are not that first one to report this issue. Did you wipe dalvik cache & cache after flash rom?

Don't panic if you can boot into recovery you can flash other rom. And if you don't there're other ways to recover your phone.
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
Can someone help me............................:crying::crying::crying::crying::crying::crying::crying::crying:

---------- Post added at 01:02 PM ---------- Previous post was at 12:57 PM ----------

I cant boot into recovery mode.how restore and recover my phone?
[LG Optimus L9 P760, P765, P768, P769] artit:
If there boot loop, may be adb work. When phone boot up connect your usb and try to issue following command

> adb reboot recovery

You said you cannot boot into recovery? Even with Vol Up + Home + Power combo? Which recovery have you install?
[LG Optimus L9 P760, P765, P768, P769] shoqeparvaz:
I think recovery not Install because vol up+home+power not boot into recovery.

I stay in step3,4 "Installing Custom Recovery with Fastboot".

file start.bat not run.
[LG Optimus L9 P760, P765, P768, P769] godfate:
Does anyone know how to remove custom recovery? I can't install any OTA updates, and I think it's because of the custom recovery. It's getting very annoying, because the OTA update reminder keeps flashing on my screen. Can anyone please help?
[LG Optimus L9 P760, P765, P768, P769] BajoPrimate:
Hi [MENTION=4915163]godfate[/MENTION], when you flash any kdz you also install the stock recovery (automatically).

Cheers. Good luck.

Sent from my LG P76020L-EUR-XX unlocked and rooted
[LG Optimus L9 P760, P765, P768, P769] MrWhisper:
I already flashed P760 V20B Europe Open to my P768

adb devices recognize my phone but adb reboot oem-unlock is not working. my phone just reboot and go straight to LG logo, no black screen with white text.

not working on both Windows 8.1 and elementaryOS (Ubuntu 12.04 with kernel 3.10)
[LG Optimus L9 P760, P765, P768, P769] vizerd13:
thank, i will try
[LG Optimus L9 P760, P765, P768, P769] GFR04:
You should flash your L9 with 910k resistor cable:

http://xdaforums.com/showthread.php?t=2069564

First v10a, then v20b open europe and next to try unlock command on Windows 7 :p
[LG Optimus L9 P760, P765, P768, P769] MrWhisper:
910k resistor cable << is it a cable comes with phone? I use a cable which comes with phone.
[LG Optimus L9 P760, P765, P768, P769] meso87:
I think you should make it by yourself. Btw can it help to unlock BL on P760?

Sent from LG P760
[LG Optimus L9 P760, P765, P768, P769] niishoux:
This may lack of some sense, but...

I have a factory unlocked p768.

baseband: L6260_MODEM_SIC_01.1230.00

compilation number: JZ054K.

software version: P76820b-AME-XX.

In the reflash p768's KDZ step, should I use my country's KDZ (Venezuela, V20B-p768G)? As it's factory unlocked, is there any downside in custom ROM installing (or anything in general) by doing that?
[LG Optimus L9 P760, P765, P768, P769] BajoPrimate:
Hi niishoux, as far as I can see, you have your p768 unlocked (congratulations) and now you want to go back to your phone's ROM? or perhaps installing custom ROMS?

If that's actually your question, I'd recommend you to carefully read the thread of your wanted rom twice or thrice. Each rom has its own limits.

Follow all the steps.

Cheers. Good luck.

Sent from my LG P76020p-EUR-XX unlocked and rooted
[LG Optimus L9 P760, P765, P768, P769] niishoux:
I didn't unlock it, it came unlocked. One of my questions should be: Is the bootloader locked still? This "factory unlock" just counts for phone carriers use or bootloader comes unlocked too? (I think no). As I understand the first post, you install p760's KDZ because it's where you can unlock the bootloader. So, what I should have said would go like this:

I have an unknown KDZ right now (Unknown for me, at least. Because it doesn't have a country or carrier attached to it). After installing p760's KDZ for bootloader unlocking, to which p768's KDZ should I come back? It matters in any way If I now attach my phone to use my country and carrier V20B version? Do I have to use other one?
[LG Optimus L9 P760, P765, P768, P769] donk165:
Sorry, I havnt checked in on this thread in a long time, ill have to update the post if things have changed for the L9, I sold mine and changed to Xperia SP, mainly in those boards now.
[LG Optimus L9 P760, P765, P768, P769] arman0077:
me have this problem with my phone.

please tell what should i do?
[LG Optimus L9 P760, P765, P768, P769] hamedbb:
Hi Boss

when I was unlocking bootloader , there was an step :

Step 3. Connect your phone to WiFi and make sure you are able to access the internet. Then leave your phone for 30 mins. This makes sure the device is ready to be unlocked.

At that time I was not able to access the internet and I closed my eyes and escaped this step .

now I have a lot of issues with wifi ( specially with MOKEE and MIUI roms ) .

In MIUI I never could connect the internet and in Mokee , in 1st boot it connects but tomorrow , wifi do not works .

Any idea ?

should I lock my bootloader and unlock it again or any other clue or patch or ... ?

---------- Post added at 09:52 AM ---------- Previous post was at 09:49 AM ----------

salam

fekr mikonam kar shoma dorost boode va kar tamoome .

gooshi ro be halate S/W update be pc vasl kon . ba horrofe sefis , oon bala neveshte bootloader unlocked .
[LG Optimus L9 P760, P765, P768, P769] hamedunix:
I don't seem to be able to find V20B/V20C P760 kdz files. All I find is V20H P760.

Should I go ahead with that?
[LG Optimus L9 P760, P765, P768, P769] Maniyac:
i have LG P769 and i tried to root and install custom rom from a tutorial https://www.youtube.com/watch?v=WyNtFP_TkKc and now i am stuck with mirror touch and inverted color in my mobile. Even i tried to fast boot it but cant do it, it get stucks at waiting device in cmd and cant go further from the screen plz help

if possible a video tutorial will be more helpful plzzzzz
[LG Optimus L9 P760, P765, P768, P769] donk165:
I dont mean to be a ****, but this is P768 unlock guide, not P769. Im sure theres a few guides for unlocking the P769 bootloader around, back when I still owned this device, there were quite a few guides for each version of the L9. I hope you can find the guide you need.

I cant make a video guide as I dont own the device anymore and I dont have any of the LG files on my PC anymore. Sorry I cant be of more help.
[LG Optimus L9 P760, P765, P768, P769] danzukuka:
in step 5 when i type adb reboot oem-unlock phone restarts and boots, no black screen no text no confirmation, nothing.

and when i want to check if bootloader is unlocked in the hidden menu it crashes.

what can i do ?
[Android General] sralli:
Hey guys i saw that there was no thread for p300, so i decided to make one (this is the support and development thread)

Do this at your own risk

1=Root your funbook

It is rooted but sometimes it is not rooted so you must visit this page: http://apk4phones.blogspot.in/2013/05/root-in-just-two-minutes.html

Download the unlock root software from there- (second post), download the app, connect funbook with usb debugging to pc

click root (DONE!!!)

But first try to install Super User app from playstore as MMX P300 is already rooted

2= Installing CWM recovery

This page: http://xdaforums.com/showthread.php?t=1662010

3= Jellybean rom without bugs:

http://xdaforums.com/showthread.php?p=39121819

Video for this rom:

http://youtu.be/fFxJ-mA20hM

4= Funseries Rom

http://xdaforums.com/showthread.php?t=1667129

5= Jetmod rom

http://xdaforums.com/showthread.php?t=1659090

6= Cyanbook v4 rom

http://xdaforums.com/showthread.php?t=1682487

7= Lightning rom

http://xdaforums.com/showthread.php?t=2086992

Comment if More help needed- will help

8= Battery calibration problem

Best method to fix is to install another rom, it will fix, if you want to keep it on stock rom so please download the battery calibration app, and follow the steps given!!!

9= Wifi problems after installing roms

Can't connect to wifi after installing Roms?? well here is the solution:

Flash the the jellybean rom (number 3) using live suit and and then try installing other roms

It will work surely!!!! :laugh::laugh::mad::fingers-crossed::cowboy::D :svetius: