suggestion unlock bootloader - LG Optimus L9 P760, P765, P768, P769

Hi again guys,
I have a p760 with v20b_00 eu open rom and im trying a lot of time to unlock bootloader
i did everything if you will see here
http://forum.xda-developers.com/showthread.php?t=2221102&page=20
and bootloader is still locked
Any tips? any other guys which will sure unlock my BL at last?
Please

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Aristodikos1 said:
Hi again guys,
I have a p760 with v20b_00 eu open rom and im trying a lot of time to unlock bootloader
i did everything if you will see here
http://forum.xda-developers.com/showthread.php?t=2221102&page=20
and bootloader is still locked
Any tips? any other guys which will sure unlock my BL at last?
Please
Click to expand...
Click to collapse
[*]Not for Newbies. (need some experience in flashing and installing fastboot drivers)
Click to expand...
Click to collapse
Sent from my LG-P769 using Tapatalk 4

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fastboot
Are you able to fastboot?
Aristodikos1 said:
Hi again guys,
I have a p760 with v20b_00 eu open rom and im trying a lot of time to unlock bootloader
Please
Click to expand...
Click to collapse

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thankyouxda said:
Are you able to fastboot?
Click to expand...
Click to collapse
NO
The only think that i can do is to reboot in cwm by artas by holding volume down when the lights flashing but i cannot install cm 10.1 because my bl is still locked. adb reboot oem-unlock is not working correct. When i push it, sometimes reboot with lg logo sometimg shutdown and if i want to power on again i have to hold power button 10 sec and press it again

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geeshiet said:
Sent from my LG-P769 using Tapatalk 4
Click to expand...
Click to collapse
i am not so newbie mate, i learn a loto of things in this forum....

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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://forum.xda-developers.com/showthread.php?t=2119090
----------------------------------------------------------------------------------------------------------------
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.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Aristodikos1 said:
i am not so newbie mate, i learn a loto of things in this forum....
Click to expand...
Click to collapse

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thankyouxda said:
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://forum.xda-developers.com/showthread.php?t=2119090
----------------------------------------------------------------------------------------------------------------
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.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Click to expand...
Click to collapse
thank you for your responce. Actually the bootloader is still locked. Do you thinkis there any tip or cheat that it is not listed in the steps?

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Butentering in fastbootmode will not unlock the bootloader. If you followed the steps in general thread and still cant unlock it, we are with the same problem my friend and.. unfortunatelly, still no solution for me
Sent from my LG-P768 using xda app-developers app

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if you can fastboot then follow this link below and it should work afaik
http://forum.xda-developers.com/showthread.php?t=2221102
You can ignore the part about installing fastboot drivers since you should have it installed already if you are able to fastboot
And I guess you already have LG driver installed.
"IMPORTANT: You must have P760/P765 with P760 V20B EUROPE OPEN rom flashed on it....or OTHER UNLOCKABLE ROMS"
Aristodikos1 said:
thank you for your responce. Actually the bootloader is still locked. Do you thinkis there any tip or cheat that it is not listed in the steps?
Click to expand...
Click to collapse

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thankyouxda said:
if you can fastboot then follow this link below and it should work afaik
http://forum.xda-developers.com/showthread.php?t=2221102
You can ignore the part about installing fastboot drivers since you should have it installed already if you are able to fastboot
And I guess you already have LG driver installed.
"IMPORTANT: You must have P760/P765 with P760 V20B EUROPE OPEN rom flashed on it....or OTHER UNLOCKABLE ROMS"
Click to expand...
Click to collapse
Thank you guys,
First of all i NEVER saw this black fastboot screenin my phone that says "press volume up form unlock bl"
Second, i cannot find EUROPE open 20b...every link is not working

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Don't you already have V20B installed per your first post. Otherwise you will have to flash it with the offline method....
if you are able to fastboot you should be able to get to that screen i believe.
Link to KDZ.
http://csmgdl.lgmobile.com/swdata/WD...00/V20B_00.kdz
Aristodikos1 said:
Thank you guys,
First of all i NEVER saw this black fastboot screenin my phone that says "press volume up form unlock bl"
Second, i cannot find EUROPE open 20b...every link is not working
Click to expand...
Click to collapse

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If your model p760 you should see a fastboot screen (everything black with dome letters on top). But you can confirm if you are in fastboot mode when you run the start fastboot.bat, open a cmd in the folder that contains fastboot, adb, etc and type fastboot devices
You should see a coupçe of numbers and letters, like in adb devices
If dont appear nothing, your phone doesnt entered in fastboot. Then try flashing ics xloader and uboot and try fastboot again. If your device is seen, you should be able to unlock the bootloader following the tutorial in general thread, always remembering waiting 30 min or more to try
Here you will find v20b europe open:
http://lg-phone-firmware.com/index.php?id_mod=18
The download will not work if you have shttps enabled and hosts file still have the lg related lines. You must remove the 2 lines, save it, close shttps and try download again, now will work
Sent from my LG-P768 using xda app-developers app

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shucrut said:
If your model p760 you should see a fastboot screen (everything black with dome letters on top). But you can confirm if you are in fastboot mode when you run the start fastboot.bat, open a cmd in the folder that contains fastboot, adb, etc and type fastboot devices
You should see a coupçe of numbers and letters, like in adb devices
If dont appear nothing, your phone doesnt entered in fastboot. Then try flashing ics xloader and uboot and try fastboot again. If your device is seen, you should be able to unlock the bootloader following the tutorial in general thread, always remembering waiting 30 min or more to try
Here you will find v20b europe open:
http://lg-phone-firmware.com/index.php?id_mod=18
The download will not work if you have shttps enabled and hosts file still have the lg related lines. You must remove the 2 lines, save it, close shttps and try download again, now will work
Sent from my LG-P768 using xda app-developers app
Click to expand...
Click to collapse
yes that hosts file was the problem thanks. Also i already download some x and u but i feel that they are the wrong ones. Can you tell me which ones to download? shall i install them with rooted eu open 20b or with some ics rom?
i never be in fastboot mode. Every time i pushed adb reboot oem-unlock the phone or restarts or turned off (i think)

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You can follow this: http://forum.xda-developers.com/showpost.php?p=44325657&postcount=4
Probably will help you a lot in this fastboot thing, i put a link to Lelus's fastboot thread. Downloading the file from there you'll be able to install your phone's xloader and uboot files
Sent from my LG-P768 using xda app-developers app

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shucrut said:
You can follow this: http://forum.xda-developers.com/showpost.php?p=44325657&postcount=4
Probably will help you a lot in this fastboot thing, i put a link to Lelus's fastboot thread. Downloading the file from there you'll be able to install your phone's xloader and uboot files
Sent from my LG-P768 using xda app-developers app
Click to expand...
Click to collapse
Ah! so with this only i can unlick my BL? no 30 minutes waiting?

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No, im sorry, didnt explained to much. Follow that to flash xloader and uboot and then install V20B europe open with the tutorial i said to you. After that, hard reset the phone (turn it off, turn it on and let pressed vol down and home button). After hard reset the phone will restart. Let phone connected to wifi and make sure your sim card is inserted and you have the network signal, enable usb debugging and connect your phone to pc via usb cable in lg software mode. Then wait 30 minutes (best is to wait at least 1 hour). Open a cmd where adb is (if you downloaded fastboot.zip from the link i gave you, its inside the fastboot/bin folder you extracted) and type the following command:
adb reboot oem-unlock
Your phone should restart and show you a black screen asking if you do want to unlock the bootloader. Press vol up to unlock the bootloader. And thats it, hope it work for you
Sent from my LG-P768 using xda app-developers app

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shucrut said:
If your model p760 you should see a fastboot screen (everything black with dome letters on top). But you can confirm if you are in fastboot mode when you run the start fastboot.bat, open a cmd in the folder that contains fastboot, adb, etc and type fastboot devices
You should see a coupçe of numbers and letters, like in adb devices
If dont appear nothing, your phone doesnt entered in fastboot. Then try flashing ics xloader and uboot and try fastboot again. If your device is seen, you should be able to unlock the bootloader following the tutorial in general thread, always remembering waiting 30 min or more to try
Here you will find v20b europe open:
http://lg-phone-firmware.com/index.php?id_mod=18
The download will not work if you have shttps enabled and hosts file still have the lg related lines. You must remove the 2 lines, save it, close shttps and try download again, now will work
Sent from my LG-P768 using xda app-developers app
Click to expand...
Click to collapse
as i read in your post, you told me to install ics x and u for 760, which means i will install ICS x and u with 20b JB roma is that correct?

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Guys at last!!!
IS THERE ANYONE WHO HAS LG L9 OPTIMUS P760 (NOT P765/P769/P*******) ONLY P760!!!!!!
WHO UNLOCKED HIS PHONE? IF YES HOW?
WHICH ROM DID HE USED?
WHAT X AND U DID HE USED?
at last tell me

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shucrut said:
No, im sorry, didnt explained to much. Follow that to flash xloader and uboot and then install V20B europe open with the tutorial i said to you. After that, hard reset the phone (turn it off, turn it on and let pressed vol down and home button). After hard reset the phone will restart. Let phone connected to wifi and make sure your sim card is inserted and you have the network signal, enable usb debugging and connect your phone to pc via usb cable in lg software mode. Then wait 30 minutes (best is to wait at least 1 hour). Open a cmd where adb is (if you downloaded fastboot.zip from the link i gave you, its inside the fastboot/bin folder you extracted) and type the following command:
adb reboot oem-unlock
Your phone should restart and show you a black screen asking if you do want to unlock the bootloader. Press vol up to unlock the bootloader. And thats it, hope it work for you
Sent from my LG-P768 using xda app-developers app
Click to expand...
Click to collapse
Soory i just saw this message mate. Ok i will do exactly that (according my english your messages sounds more familiar to me)
i will choose order "6" in fastboot that says "x & U for p760 jb (not "2" for ics)

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Ok i did this guide
BL is still locked but when i run command adb reboot oem-unlock i saw somethignthat i never saw before
adb server is out of date. killing...
* daemon started successfully *
but the phone shuted down...no restart and to power on again i kept 10 sec power buton and after it powered on.
Question, when i run oem-unlock the fastboot goes immmediatelly or after some time?