yashsingh1/xdaforums huggingface dataset:
[LG Optimus L9 P760, P765, P768, P769] kuma82:
I thought you were talking about extracting the kernel and putting it in the, 20f boot.img, never mind. You were just talking about swapping the boot.img
[LG Optimus L9 P760, P765, P768, P769] shucrut:
[MENTION=5341181]omgbossis21[/MENTION] I tried your test libunlock.so file too and i didn't see difference, the phone just rebooted :(
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Thanks, I will pull the link for now. No errors though?
[LG Optimus L9 P760, P765, P768, P769] shucrut:
Im sorry but i didnt logcat this time, i dont know if appeared errors
[LG Optimus L9 P760, P765, P768, P769] nullvader:
Would be GREATLY appreciated. You got an ETA or will it come when it comes? :D
[LG Optimus L9 P760, P765, P768, P769] BioDesigner48:
Heres is something i came across...

This fellow member had tried to unlock bootloader on p768 and failed, buy then used his laptop with Linux and boom, the adb command worked!

Maybe if we try the adb unlock command on a Linux based computer it'll work.

Here's the link to the post, bottom post BTW http://xdaforums.com/showthread.php?t=2189646

Just thought it'll be something useful:D

sent from my locked rooted P769 v20f

I'm on YouTube (BioDesigner48)
[LG Optimus L9 P760, P765, P768, P769] elpuertorro:
I think is safe to go with your second guess, come on you on XDA you should know better then ask for ETA's even if it's just a vid :p
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Looked through the 4x unlock thread and some members couldn't unlock their Official unlock with certain versions, tried others and it worked first time.

Edit testing now....
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
this has probably already been answered but can i skip the part about rooting your phone i already rooted it using a different method?
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Tried a different adb version still failed. I noticed if you try system update on open firmware (I'm a wonky screen pro now) it says phone not registered yet. Maybe that's why we have to wait and lg has just gotten slow about it.... I do not think we need to flash 10g as flashing the x and u for ics before flashing properly inverts everytime. On the open firmware I even flashed a blank nv partition, unlocked u and unlockable x just in case. I wonder for everyone who can't unlock is mlt disabled? Mine is and I can't unlock. I'm shooting in the dark but the lg phone registration may be dependant on it and *maybe* stored on the mlt partition. Tonight I may try enabling mlt and maybe even flashing that partition on open firmware.....

So who's got mlt disabled besides me?
[LG Optimus L9 P760, P765, P768, P769] shucrut:
Did you tried on linux already? I have mlt enabled and tried directly from the phone reboot oem-unlock via terminal but nothing. Ive disabled it now and will try again
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Haven't tried on ubuntu and I can't re enable mlt without a factory reset. I'm just gonna flash open firmware tonight and go to bed then try In the am lol

If mlt was on for you I don't think that's it (especially since I just poked around the mlt partition). I think it boils down to the phone registering. I just looked through those 2 mmc blocks on the 0 partition and although its a pure binary file it has lots of bootloader related stuff in it. Open kdz does flash them and the files must be live bc I can't work with them while the phone is in normal operation.
[LG Optimus L9 P760, P765, P768, P769] RustyKungFu:
I am not a noob to ROMing but I am a noob at working with this LG L9 on T-Mobile USA.

I have followed the instructions in the video and I got pretty far, I was able to get recovery installed, the device rooted(obv), but when it came to unlocking the bootloader.

I have since read every page of this thread and I am still at a loss to unlock the bootloader.

The device is running the V20B KDZ. From command prompt I ran "adb reboot oem-unlock" the device restarts and all I get is black screen.

I am at a loss as to what to do. I have since flashed V20F to the device and replace the LGP769_AP[11].bin during that process and reattempting the unlock command to no avail.

Please assist..... :'(
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Sounds like its working for you then. Press the volume up (double check its the up in the guide) when you reach the black screen
[LG Optimus L9 P760, P765, P768, P769] RustyKungFu:
Thank you for your recommendation to dig deeper into this thread for what to do when one reaches the "black screen" after adb unlock command. I am going to have to reattempt my efforts in a day or two.

The device I was working on is not mine. Belongs to a friend who really does not like the LG stock UI, and neither do I. ;)

I cannot state I dislike LG, my primary device is a Nexus 4.

I flashed V20F to the device, rooted and applied touch fix.zip so my friend has a usable phone until I can work at it again on another day. My first of the next attempt will be this :fingers-crossed: http://xdaforums.com/showpost.php?p=44144663&postcount=300&nocache=1&z=9848878707027290

I have to admit this device is a real pain to deal with but I am definitely going to appreciate having this completed. Once I know the process for this variant I will make my best effort to provide a detailed step by step guide so others need not hunt like many of us. The good side of this device is that it is difficult to brick :silly:
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Waited over night and still nothing lol. I don't think the adb version has anything to do wit it. However if someone couldn't do it on windows and it worked on linux I would assume drivers are causing a conflict. To avoid the possible conflict I will leave the phone in charge only mode tonight on open firmware.
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
HELP

im stuck on the start screen with the android 4g tomobile thing. everythime i restart it comes back to this. I just got done doing the sw update
[LG Optimus L9 P760, P765, P768, P769] RustyKungFu:
Try a hardware reset maybe. I think it is Vol. Down + Home button + Power. (this will erase all data contents on the sdcard storage)
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
i think it was when copying over the LGP760_AP[11].bin i renamed it to LGP769_AP[11].bin because all the others where 69s. I used the v10g.kdz which i dont understand why it didnt work because i have a 10g phone.
[LG Optimus L9 P760, P765, P768, P769] RustyKungFu:
Renaming that file will not benefit the process, they are unique to each flash procedure. LGP760_AP[11].bin is for when you flash the V20B KDZ to the P769. There is a file that I found yesterday that located that was a LGP769_AP[11]*********.zip you rename to LGP769_AP[11].bin when flashing to V10G or V20F.

I cannot remember where I located the file but I can share it with you via google drive. I am unable to post links here because I am too new. :( try PMing me your gmail and I will share the file with you. its about 75MB.
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
actually when i updated back to jelly bean its 20f now. Didnt he say to flash the 10g no matter what? The tutorials kindof unclear
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Well I've tried unlocking about 9x since last night, no luck. Accidentally on the inverted cwm choose errase backup from external sd so I lost my damn backup. I no longer feel it's worth trying anymore. I even used fast boot to erase the boot partition before flashed open more than once. I'll just use the phone as is until I can buy another one. Swearing off LG for good though.
[LG Optimus L9 P760, P765, P768, P769] animusFL:
Wow, sorry to hear that. So I guess you even tried from terminal on phone? Plenty of good cell signal?
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Half of the tries no signal other half flashed radio with plenty of signal. Tried on terminal,on ubuntu and 2 versions of Windows adb. ...always factory reset and hard reset on top of flashes.
[LG Optimus L9 P760, P765, P768, P769] animusFL:
That rather sucks. But I can say one thing, you tried harder than anyone else I think. Sounds like you've earned a Samsung for sure!
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Those 2 partitions on the 0 block load the boot loader so in theory that's what determines an unlocked status(prolly by efuse). You can't touch them live system but I booted in recovery pushes both unlocked partition in then unlocked u and x and boot on 20d then ota updated to 20f pushed all those files again and still nothing lol. Wowzers
[LG Optimus L9 P760, P765, P768, P769] isaacj87:
Overall, I found the OP's video very informative, and I was able to unlock my bootloader with little trouble. However, there were a couple things I ran into that might other's might need to know. For the record, I did the unlock on the "MetroPCS" version of the L9 (they versioned it MS769, but the packaging says it's the TMUS P769, so I doubt there's any real difference).

Before I did anything, I rooted the root (using the Lelus root method), installed artas182x's bootstrap recovery, and made a backup of the stock ROM. This helped me understand the unlocking process (i.e. flashing the KDZ), but also gave me something to fall back on just in case.

I foolishly forgot to take off my pattern lock screen before flashing the KDZ. So, my suggestion is to take off any lockscreen before flashing the KDZ. If not, you'll have a lot of fun trying to unlock the phone with an inverted screen!

I didn't have to flash the radio files after flashing the KDZ. Technically, I had service (cell and data), and the baseband version was just an older radio. However, I flashed the updated radio just in case. After I unlocked and installed CM10.1, I installed the updated radio (1305), and it works just fine.

Thanks for the vid, OP. It definitely helped, and I'm now running an unlocked BL. :good:
[LG Optimus L9 P760, P765, P768, P769] animusFL:
I'm so glad I got my phone with 10g on it. I forced 20d via kdz and rooted. Lived with that for a few weeks and read and re-read about unlock procedure. Was able to backtrack to 10g then to euro 20b and unlocked. Makes me wonder about 20f. So glad I never touched it.
[LG Optimus L9 P760, P765, P768, P769] kuma82:
20f is a problem for some because the u-boot does not get replaced while flashing 20b

CM 10.1 P769
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
Do we know exactly what is going on in the long wait?

does the phone download a unlock token from the network? if so is it possible to find this file through logcat, like the lib a fellow member found the other day, and inject it?

because if its a token, maybe t-mobile just stopped broadcasting this token don't you think?
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
I believe after looking at more logs its simply waiting for the sim to be fully registered on a network BC the unlock process changes the network operator which puts it in test mode. For the record I pushed ics x and u via fastboot before every single flash. Maybe the 20f update is prep for a 20h unlockable (dream big) :D
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
here's the craziest part about my unlocking attempts, after flashing the v20B with the bin, the first time, i never lost radio, i always had it and 4g was working and everything, so i didnt need to flash the radio...:silly:
[LG Optimus L9 P760, P765, P768, P769] Lelus:
There is :

# hidden reset: check if ti's first boot
persist.firstboot.hiddenreset=0

in build.prop , I wonder if setting that to 1 would do more than a hard reset

I
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Flashing from open firmware to 20d did not replace the open baseband. I get 3g now where I never had it before and instead of 4g it says hspa. Much better!
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
https://www.dropbox.com/s/gw74cg1ntwmwlij/cwmtouch.img

There's the link I need to updated the files sorry...

-SPQR
[LG Optimus L9 P760, P765, P768, P769] shook187:
is cm10 the only rom i can use? after this????

I tried flashing avatar but it was mirrored and very wonky :(
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
Yes but now that its finally summer I'm going to port a couple of ROMs :D (MIUI is one of them)

-SPQR
[LG Optimus L9 P760, P765, P768, P769] xxtra_strength:
noob with LG phones.

I really like this phone, but after reading all the post, and the unlocking process. I'm Dam, i should've gotten another type phone.. Well, i will keep this phone if someone find a ABC unlocking and rooting process.
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
Yea only the p760 came with bootloader unlocked with JB

-Squirtle
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
I successfully unlocked my bootloader, it was much easier than I thought I guess because it was exactly the same method I used on my older device. I guess I'm flashing PACrom now, thanks xD
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
Guys please help me out here! I bricked badly while trying to flash fastboot from that omap4boot method :'(

That's the only thing that visually boots up, nothing else works.

How can I fix this? I have an unlocked bootloader, what can I do to fix this? :(
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
OK Leo still need help? If you do message me and I will guide you through the necessary
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
I figured it out, got myself back on JB stock rooted official P769, with Fastboot installed but bootloader got relocked I have no idea how. And no matter what I do I can't install or boot into custom recovery
[LG Optimus L9 P760, P765, P768, P769] Tablechair:
You need to flash uboot and xloader from P760 the p769 files don't support unlocked boot loader.
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
Okay and because I have fastboot I should be able to flash with no problem? :)
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
Rooted ICS with unlocked bootloader and fastboot, all I need is a custom recovery and I'm set :D

I can't believe I bricked and figured out my way back lol so glad I learned from past experiences :)

Edit: I got a security error, I can't even boot into my phone at all.
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Did you get it running yet?
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
I reflashes rooted ICS and it's booting up again. I can't seem to get recovery to work no matter what I try
[LG Optimus L9 P760, P765, P768, P769] Tablechair:
If you have the p760 x and u and you're getting a security error I suspect you did not successfully unlock your boot loader.
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
I'm using the ics ones for P769.

I know I successfully unlocked my bootloader because every time I flash V20B and put my phone into software mode it diaplays a reversed software upgrade screen with "bootloader unlocked" displayed above.

Does this mean I have to flash the u and x from JB for P760?
[LG Optimus L9 P760, P765, P768, P769] Tablechair:
You need x and u from p760
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
Okay I'll flash it now then, does matter that I'm on ICS?
[LG Optimus L9 P760, P765, P768, P769] Tablechair:
Not in the slightest my friend :D
[LG Optimus L9 P760, P765, P768, P769] leolawliet:
Flashed, now I'm gonna install twrp *crosses fingers*

Edit: Still getting that dead Android with the red triangle floating over it.. I'm ready to give up at this point
[LG Optimus L9 P760, P765, P768, P769] SomeGuyInOz:
Thank you soooo much elpuertorro! I have just successfully unlocked my bootloader and installed a custom ROM :) It worked first time, mostly thanks to your instructions and the video in this forum! :D:D:D:D

My phone is an LG Optimus L9 P769 (T-Mobile). I bought it about a week ago (mid August 2013) brand new from Best Buy for $179. I visit the USA occasionally so I wanted a phone which actually functions on 3G/4G, with no monthly contracts, etc. The Optimus L9 seemed like a good choice. One of the first things I did was get it SIM unlocked, so that I can use it with other SIM cards and other carriers around the world. For that, I bought an unlock code from eBay for a little under USD$2 (!!!) (PM me if you need link)

Realizing how much bloatware there is on the P769, I decided I'd plunge into custom ROMS. Although I have installed custom ROMS before, I didn't really know much about unlocking bootloaders, etc. There is so much to read on these forums and it's really not easy for a noob. I can understand why someone would be hesitant to attempt this. But it really was just a few basic steps:

1. My Optimus was on T-Mobile V20D when I bought it. I let it do an OTA to V20F straight away.

2. Rooted using the LGpwn.apk (very easy) and installed BusyBox from the PlayStore.

3. Flashed stock T-Mobile V10G_00.kdz

4. Flashed the European Open P760 version of V20B_00.kdz and factory reset

5. Waited about 40 mins (screen was reversed, touch was messy, wifi was on and connected, SIM card was in, but no cell radio)

6. Issued "adb reboot oem-unlock" through my PC and BANG! It rebooted to the bootloader unlock prompt!! Bootloacer unlocked!

7. Rooted using LGpwn.apk (I installed it using adb through my PC, because I couldn't get the Lelus method to work???)

8. Installed CWM recovery

9. Erased all my old data and installed CM10.2 for P769.

9. Installed TouchFix and Radio.zip (to get cell phone working again).

I seriously did not expect this to work first time. The only real hurdle I faced was I kept getting an error when trying to flash the V10G_00 KDZ. It turned out it was corrupt so I just downloaded it again and the new one worked fine.

If anyone has any questions, let me know. I am a noob too and I know how overwhelming all this info is. Thanks everyone for all the information here!!! :)
[LG Optimus L9 P760, P765, P768, P769] elpuertorro:
No problem just shared what worked for me in hopes it would help others like yourself! the thank you's should be for the ones who made this possible for us!! congrats man! :highfive:
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Hey did you get my PM on how to make those flashable zips

CM 10.1 P769
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
I'm jealous! Having read that I realized something. I used cwm to upgrade to 20f. How about you guys who can't unlock? Ive now flashed 20d and ota update 20f. I'm gonna try this one more time!
[LG Optimus L9 P760, P765, P768, P769] elpuertorro:
Yes sir forgot to thank you for it haven't read and tried yet but did check the msg out, so thank you again!:good:

---------- Post added at 02:04 AM ---------- Previous post was at 02:02 AM ----------

have you tried my way? first flashing the X and U then >10g then> straight to unlockable euro 20b! skipping Tmo20f???

sorry can't check back to all you have done already that's why I'm asking and brb back in like 1/2 hr gonna smoke me some greens!! lol
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Have fun ;)
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
yes ive started from 20f flashing ics x and u flashing 10g to 20b with factory resets and hard resets multiple time. The key maybe doing a factory reset while on 20b I bet it clears what triggers our "bootloader unlock prohibited" flag.
[LG Optimus L9 P760, P765, P768, P769] airtrack:
Did you get European 20B.kdz file from first thread? (from mega.co.nz)

I did it several times but nothing still happens after adb oem-unlock. Still had no luck.

My device is p769 TMO

ps. i use file from first thread (mega.co.nz)
[LG Optimus L9 P760, P765, P768, P769] NeoVincent28:
Hey I cant seem to get this to work when I add the .kdz path and run the http.exe. When I click the normal upgrade then click upgrade start. Its starts the process like in the video, but it starts the LG Mobile Support Tool and wants to install the driver that is provided in the folders.Which I know I did. What could be going wrong I would really like to get this boot loader unlocked.

Thanks in advance for any help.
[LG Optimus L9 P760, P765, P768, P769] elpuertorro:
I do remember doing a reset on 20b to be safe but honestly would love to know why it's so easy for some of us and not for you guys :confused:

---------- Post added at 04:33 AM ---------- Previous post was at 04:32 AM ----------

Ooohh I am having fun now!! :silly::D
[LG Optimus L9 P760, P765, P768, P769] SomeGuyInOz:
Yes, I did. I remember, because the file is 666MB and at the time I was in a Costa Mesa hotel room... number 666!!! Freaky! (Side note: I bought a couple of grocery items yesterday, and the total was $6.66!!!)

Those files were all good - the only one that was missing is the V10G_00.kdz (T-Mobile, stock ROM for P769). I got that one from here. - I found that link in this forum: [INFOBANK] Collection of LG L9 FACTORY ROMS, ROOT, BB, BL, SOURCES, etc. There are two links for that ROM there. Use the one from the Microsoft SkyDrive. I downloaded the Rapidshare one twice and both times it was corrupt and would not extract.
[LG Optimus L9 P760, P765, P768, P769] airtrack:
hahaha i did your exactly method but nothing still happen after reboot. :(
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
edited
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Tried again. More flashing 10g more hard resets more factory resets and nothing. I extracted 20b and 0p1 0p2 partitions are blank. I don't recall where I got them but I had a 0p1 and 0p2 that had bootloader pertaining info in them. Nooby sent me his partitions before and after unlock on his unlockable variant and they were blank before and after? I think I will pull mine on 20f toward the end of the week and look into them.
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
Does this method work?

http://xdaforums.com/showthread.php?t=2173465
[LG Optimus L9 P760, P765, P768, P769] elpuertorro:
ok i see you added some info and i noticed 2 things

1. You went from 10g straight to 20b

2. Like me you had the sim but no signal because of radio.

Could this be the clue???
[LG Optimus L9 P760, P765, P768, P769] RustyKungFu:
Thus far I have tried elpuertorro and SomeGuyInOz method with no success. :crying:

I have tried both, verbatim...

I am at a loss as to what to do at this point. :crying::crying::crying:

I gave each try after flashing V20B a minimum 1 hour wait time before running the unlock command. My device just reboots and I am never taken to adb where I can select to unlock.
[LG Optimus L9 P760, P765, P768, P769] nevkuril:
I just unlocked friend's P769 on the first try. I think the trick is to have working data connection, which probably means no WiFi. I actually turned WiFi off so mobile data connection kicks in.
[LG Optimus L9 P760, P765, P768, P769] RustyKungFu:
I just tried that now, the OP's method.

After a hard reset.

Flashed V20B, installed L9 recovery.apk, rooted, installed Recovery, rebooted to recovery, flashed radio.zip, after reboot from recovery the navigation lights blink while the LG logo appears, once the device is up and running no WiFi on, have data, let sit for 51 minutes and then ran unlock command, result = device reboots.

Not sure what I missed.

The V20B I flashed from the LG software updater is the one included in the (All The Files In One Zip) from ggfool provided in the link from the OP. I wonder if it differs than the file found in the KDZ thread?
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
I've tried with and without data at least 20x each honestly. Usually flashing 10g before 20b, tried with unlocked partitions, custom built NV partition, unsecured block 0 partitions,factory reset and reflashed partitions after command not working blah blah. Isn't there a 20c open? I wanna try working with that...
[LG Optimus L9 P760, P765, P768, P769] zironia:
They have a 20H open Euro KDz. Downloading it now and will try flashing and opening bootloader tonight. I have tried everything so far and all i get is usual reboot. Here's hoping.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I just got this as insurance replacement for my Galaxy S II. Any progress with the bootloader for the P769? I miss Cyanogen. :(