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Unlocking the LG Optimus L9

The L9's (p760) update to Jellybean from LG started rolling out today. It has a ton of new stuff for people who are interested in keeping the stock ROM, and another new thing that's of interest to us: the bootloader is now unlockable.

How?

Step 1 - After installing the JB update (I don't know if there are any leaks, but it so avoid them. The real update is out), make sure you have a SIM in your phone and let it stay on for at least 30 continuous minutes. This is important!. If you skip this step, you may end up with a permanently locked device.
Step 2 - Enable USB debugging in the developer options, and run " adb reboot oem-unlock " from your PC
Step 3 - You'll land at a confirmation screen like the one in the first photo of this post. Read it, and follow the instructions there.
Step 4 - If your device unlocked, you'll be in fastboot mode. The phone will helpfully tell you about it (Second photo). Congratulations, your bootloader is unlocked and your L9 can run unsigned boot images
Step 5 (optional) - While you're at it, stay in fastboot mode and flash CWM from http://download2.clockworkmod.com/recoveries/recovery-clockwork-6.0.2.9-p760.img  with " fastboot flash recovery recovery-clockwork-6.0.2.9-p760.img "
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81 comments
 
why is there 30 minute waiting period? What is going on there?
 
+Keyan Mobli Because of reasons. I'm passing along the instructions (and warning) that were given to me.  :)
 
As a long time LG fan, let me say that's great for L9 owners and I'm glad LG allows unlock. But I'll be hard pressed to buy another LG device after they locked the p930/vs920 boot loader with an OTA update. That is not acceptable. Ever.
 
Since 4X HD and L9 already received their v20 update, anyone wanna make bets when L7 will receive it? And if so will they fix the glitch when you could hack the locked bootloader? 
 
Now the blootloader of 4X is unlocked and there' s also a ClockWork Mod by Dexter on XDA. Why we must wait for CM 10.1?
 
no confirmation screen... just a reboot after step 2. any suggestions?

 
+CRISTIANO VIGLIA RON Because I don't work with leaks, and I know v20a's unlock will cause issues to a bunch of people.

Also, because right now I'm fed up with 4X users' impatience and I don't want to.
 
i can try everything i want... i cant get to boot to this unlock screen...
 
I've unlocked my 4X and haven't any issues but ok we wait some other time with patience. .....
 
Hi!
What does it mean "run " adb reboot oem-unlock " from your PC".
I frome Ukraine and my english not so good.
 
Hi!
What does it mean "run " adb reboot oem-unlock " from your PC".
I frome Ukraine and my english not so good.
 
In the second step It says to run something, how or where should I type that command? 
 
well, I can't seem to get the update... maybe it's because of my carrier...
 
Boas, tenho um LG P920 3D desbloqueado, mas não consigo fazer a atualização do android 2.2 para o 4.1, ja dei voltas e voltas, estou registado no XDA como nick: kazymata, mas fica aqui o meu mail: kazymata@msn.com. Cumprimentos
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+Иван Власенко search "cmd" in the start menu (for windows 7) and open the application. You're supposed to type in that line into the cmd window and hit enter, but I'm not too sure whether the line provided by Ricardo is correct since I unlocked the bootloader of my nexus 4 with a different string of commands 
 
Hi, are there any plans for the P768? It's basically the same phone, but with an 8MP camera
 
worked fine so far...BUT it pushes the cwm-file successfully, but CANT go to recovery mode...isnt it "power+voldown"?

 
worked fine so far...BUT it pushes the cwm-file successfully, but CANT go to recovery mode...isnt it "power+voldown"?

 
worked fine so far...BUT it pushes the cwm-file successfully, but CANT go to recovery mode...isnt it "power+voldown"?

 
Hey! I just want to say thanks! I did not have this phone, and maybe never will, but now I don't choose my phones over the procesor, or the screen, but over it's officialy supported by you.

You help my myTouch 3G Slider, my Droid 2 Global, and my Galaxy S. As well, my friends and family android-supported phones.

Thanks!

PS: I don't mean you like "you", cause I don't know if ever support one of that phone, but all the work you do as one, you are amazing. 
 
Worked without problems, thank you very much :D
TS Yew
 
Hey RC, have you and the rest of CM thought about opening a channel specifically for reporting bootloader unlocks? That would definitely speed things up.
 
Step 1 - it was necessary 7 hours for my phone.
 
Step 1 - it was necessary 7 hours for my phone.
 
type in that line into the cmd window and hit enter, but I'm not too sure whether the line ...please be more precise...please!

 
type in that line into the cmd window and hit enter, but I'm not too sure whether the line ...please be more precise...please!

 
type in that line into the cmd window and hit enter, but I'm not too sure whether the line ...please be more precise...please!

 
+Daniele Mastroianni There's a hotfix zip that you can flash throught CWM, it fixes call quality and speaker volume, I think it's compatible with all 4.2.x roms
 
You can find it on xda-dev on the l9 sub forum
 
need suggestion from you guys . whenever i run the command for oem unlock my phok my phone just reboot normally and not into fastboot. What can i do to solve this. Model: P765, ROM: V20b 4.1.2 JB for cis country's 
 
I unlocked the bootloader but when i'm in fastboot the computer doesnt recognize the phone so i cant install recovery...Any ideas how to solve this? I tried installing and reinstalling the drivers and installing Ti OMAP 4430 drivers but nothing didnt help...
 
And is it possible to re-lock the bootloader in the P760
 
hey ricardo LG has released the kernel source. Maybe so you can fix several bugs ;)
 
can you tell me how to root lg l9 p765 i cant root it :(
 
Does it work with p765 also? Or will I have to flash my phone with p760 Rom on it.
 
Wow hooo finally unlocked bootloader on P765 by flashing P760 eu open rom. Now  i am running CM 10.1 \m/ 
 
is there any way to unlock p765 while p765 rom...????
 
i have rooted my P760, i've tryed to unlock bootloader but i didn't waited 30 min... there is a solution for this problem? Thanks
 
hello sir, are you planning to build cm 10.1 for lge l9 p768 variants. i tried official cm latest nighties p760 on my p768, and it works. its booting up. but i expected theres app not working like crt effect,torch,camera,annoying msg. pop up "gallery stop" when my p768 reboot but gallery working perfectly

we p768 user are able now to unlockbootloader,pushed cwm via fastboot then rooted using flashable .zip thanks!
 
ok, I have been trying to put fastboot on my P769 (Tmobile version) but the fast boot screen is reversed and unresponsive. Has anybody tried this method on the P769 ?? please help
 
Maybe its something to do with fastboot drivers. 
OR
Try flashing JB P760 EU open ROM on your device those roms are 100% unlockable can't say about the regions. 
PS Which L9 Model do you own ?
 
+J Ramsey

I have the exact same phone as you, except that the JB version is 4.1.2 

My system is rooted according to XDA instructions - it works

I have followed all of the instructions but I get the Backwards LG logo with "Fastboot" flipped backwards in the top right corner. Other than that the phone is unresponsive, and automatically reboots normally after about 20 seconds

I have tried restarting and holding volume up, or volume up with the home button, or volume up with the home and power buttons, and nothing happens - just restarts normally or has a logo of a dead android with its stomach plate open
 
There are many people in HTCMania can not unlock the bootloader, which can be the cause? The phone is normally Restarts

Is there any solution if you do not expect the 30m?
 
There are many people in HTCMania can not unlock the bootloader, which can be the cause? The phone is normally Restarts

Is there any solution if you do not expect the 30m?
 
doood...thank you so much...i've been searching for days trying to find a method that will actually work on this phone. i've never had so many issues trying to root a phone before, this one has been a doozie...many many thanx to you sir!!  =D 
 
Whats the point of waiting at least 30 minutes? And you said:
"make sure you have a SIM in your phone and let it stay on for at least 30 continuous minutes. This is important!. If you skip this step, you may end up with a permanently locked device."
How can I know if my phone is "locked permanently" ?
 
Hey,
I've tried your solution and it worked ... for a while. I had this screen when I should pick UNLOCK and I did not :(. I just turned my phone off. It works now perfectly but when I type adb reboot oem-unlock nothing happens - phone goes black and nothing works on it - just brick. I have to put battery out to be able to run my phone back. Do you know what is going on ?
Greetings
 
you people are like not right for starters if ur phone is locked up how are u gonna go to any page to do anything mine goes to the screen saver and goes dim and bright like nothings wrong but wont go nowhere else but off , my pc says it cant read it and dont know where it is so tell me.
 
I also have the problem that my phone just reboots.  I think that's because my version is a bit too recent: my stock ROM version is P76020h-EUR-XX 

Maybe I have to flash a downgrade to allow myself to unlock the bootloader.
 
I have a p768 that was on 4.1.2, I downgraded to p760's v10a OPEN EUROPE, then updated to v20b OPEN EUROPE, I waited 40 minutes just to be safe but when I type adb reboot oem unlock, my phone just reboots, I have started it all over a few times and still just reboot. I tried using the laptop and the desktop already (both on windows 7 64bits).On XDA some have the same problem (on other variants as well). Any thoughts?
 
Whoops. I installed the incorrect recovery after getting my P769 rooted (albeit on the completely incorrect region, I do NOT want T-Mobile's crap on my Wind Mobile phone thank you very much). The recovery was touch CWM for the P760.
Aaaaand now all I see is a Security Error splash screen upon boot, then nothing. It just turns off.
I'm going to attempt to install the proper stock KDZ. Then, if I can get everything working again, I'll try unlocking it, because I really want CM11 (there's one by BobZhome on XDA for the P769).
 
Hey Mr. Mahendra chavan im bought new lg l9 2 months ago my old phone is samsung galaxy s3 its quiet easy to unlock its bootloader im trying to unlock bootloader of my lg l9 765 but i cant i also tried to flash .kdz firmware but it shows a error i dont now know y this happening to me would u plz help me may be ur from india plz hlp me my no. is 9910829099 email is nishantrajnish@gmail 
 
I have installed clockworkmod recovery from post link (recovery-clockwork-6.0.2.9-p760.img) but version shows v6.0.1.2 .... is it normal?¿?, I have used "flashboot erase recovery" to be sure about installed version, but I always get same version. Could be that source numbers are not changed?. I own a P760 device.

Many Thanks for Your Help,
Javier R.
 
can you help me? my phone just reboot , when i type adb reboot oem-unlock?  pls help :(
 
is there a better way to unlock p765??? stuck on locked bootloader....
 
The same as above comment. the same ROM build. And exactly
the same outcome. What am I doing wrong?
 
bro I did everything that can be done. I do adb reboot bootloader, adb reboot oem-unlock... I tried some programs... the phone really doesn't enter ant configuration screen, it just restarts and nothing happens. What should I do. And btw, it's P768e , does that make any difference.
 
What if i wait 30min in a place where is no line? (i'm in a tunnel, there's internet via lan but no telephone signal!)
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