yashsingh1/xdaforums huggingface dataset:
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Well it was the T-Mobile 20f update that added the libunlock library which shows a can't unlock bootloader status. Its possible I tripped mine messing with things even before my first unlocked attempt (I was flashing unlocked u, x ,20b boot etc). However my girls new phone was one bootup of stock 20f followed by a guide detailed unlock method, 3x all failed.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
this is the video i used and the files provided on hes link as well. http://www.youtube.com/watch?v=WyNtFP_TkKc&feature=youtu.be
[LG Optimus L9 P760, P765, P768, P769] kuma82:
I find it hard to take you seriously now. Why are you providing a link to the video posted in the OP :-\
[LG Optimus L9 P760, P765, P768, P769] SomeGuyInOz:
Here's mine, guys:

LGP769BKGO ATMOBKI 305KPNY....

(T-Mobile P769, bought from Best Buy in August, original firmware was 20D but I let it do OTA update to 20F. Unlocked a few days later on first attempt)

I posted above that Lelus' guide was spot on and succinct, but the guide I found most useful was the version posted by elpuetorro(?). As a noob I would not have known how to flash the x and u (p1 and p2 files). So that, along with the video, were my most useful guides.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
A couple of questions here. Will be appreciated if anyone can answer them.

1 Dd or Fastboot ics x and u.

What're ics x and u?

2 Flash 10g

10g for P769 or euro?

4 Flash 20b (don't root nor flash a radio)

20b here is euro version, right?

Thanks in advance and good luck for everyone.

PS. I spent whole night trying to unlock the BL just didn't make it following carlos's video. I'm gonna one more try with Lelus method. :cool:
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
So, it may have been T-Mobile that did this? How about we use fastboot to erase everything and just go straight to euro 20b? Doesn't it make sense to avoid T-Mobile kdz?

---------- Post added at 08:57 AM ---------- Previous post was at 08:53 AM ----------

I'm going to erase everything with fastboot and just follow what Lelus posted.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
Umm sorry i did not noticed, i ran into the video by another way. U dont have to believe me.

Sent from my LG-P769 running PAC-rom 4.3
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
i cant wait to hear if that works, sounds very promising
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
Any luck?
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I erased EVERYTHING and now I'm flashing euro 20b. I'll keep you guys updated.

---------- Post added at 12:24 PM ---------- Previous post was at 12:04 PM ----------

Okay....weird. This flash is different. I have zero signal now. Seems the radio is not there.....also, now the weather widget came up and the application manager. I just connected to wifi....time to wait 40 minutes.
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
Best of luck man. If this pulls through I will do it myself tonight. Maybe stream some Dota 2 while doing it
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
i remember correctly him saying on the video you may or may not have signal after flash, so if you dont...flash the radio zip.

I did not have signal either, and flashed it...waited about 35mins.
[LG Optimus L9 P760, P765, P768, P769] firegoblin:
[MENTION=4447066]kuma82[/MENTION] it still won't let me check the build date on the phone. I'll try again today
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
This is what I did so far.....

I ran start from the fastboot folder

I issued the following commands....

fastboot erase userdata

fastboot erase system

fastboot erase cache

fastboot erase recovery

I flashed the P760 ics u and x

I went into download mode

I flashed the euro 20b kdz and copied over the LGP760_AP[11] bin file

There was a bootloop after so I removed and reinserted the battery. Then, I pushed vol down, middle button and power on to factory reset

I turned on wifi and now waiting the 40 minutes as instructed by Lelus
[LG Optimus L9 P760, P765, P768, P769] pitbullmommy45245:
ok i am sooooo confused. i have been searching the thread and googling and i guess i just don't get it. this isn't really step by step. i don't get how you flash kdz without having root access. i'm not new to rooting but i'm new to this phone and lg. it seems alot more complicated than other phones. usually to unlock a bootloader you just go to fastboot mod and then put in adb "flash oem unlock" or something around that. can you not do that with this?
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Thank you for the instruction. Quick question: Where to get P760 ics u and x? I searched the ROM collection thread and couldn't find it.:good:
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
No luck....Now, I'm erasing EVERYTHING again and flashed the P769 ics u and x. I'm going back to the original steps outlined by Lelus, carloswii and elpuertorro. Flash 10g kdz and then euro 20b.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Here is my x u folder. :D
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
If it makes any difference i was on 10b , rooted first installed bootstrap, than unlocked bootloader.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Thank you. Good luck this time. Please keep us updated. Thanks again.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Bootstrap?....what do you mean?
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
"L9RecoveryInstaller_1.5.0.apk" installs CWM once rooted.

doesnt the guy say on the video you need it installed to use it after you flash 20b kdz, watch the video 1-2 times without actually trying it so u get an understanding of it.

I think is better to root 1st since you need that than unlock
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
:confused::confused::confused: Wouldn't that cause a security error if you try to flash CWM before unlocking the bootloader??? Unless you installed the 2nd init recovery which is useless right now.... :confused::confused::confused:

Oh, wait....yes, you are right. It did install for me...just remembered the video....so root first, then recovery cwm, then unlock bootloader? Lelus did not mention that, though.

---------- Post added at 02:26 PM ---------- Previous post was at 02:15 PM ----------

Okay....finished flashing euro 20b kdz. Just applied reset as instructed by elpuertorro. Turned on wifi and waiting 40 minutes.

---------- Post added at 02:42 PM ---------- Previous post was at 02:26 PM ----------

I noticed that when I go to the lockscreen....it shows T-Mobile sometimes but zero signal. I turned off packet data this time.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
I double checked the video. He did ask to install L9RecoveryInstaller_1.5.0.apk before flash 20b kdz. But I didn't see step to root. I assume that the 20b kdz has already been rooted, we don't need to do anything. Is it right?

The steps after flash 20b kdz in the video is:

flash radio

wait 30 mins or above

unlock bl

install ADB interface

install CWM touch

flash your own backup image or other rom
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
At the last minute, I've decided to follow the video and root, install L9Recovery.apk and reboot into CWM. I have flashed the radio and rebooted. Now waiting another 40 minutes.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
when i flashed the radio it looked like i wasnt gonna have signal still, but it took like about a minute or so to come up.. give it time than continue :)

---------- Post added at 03:58 PM ---------- Previous post was at 03:57 PM ----------

correct
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I now have the H showing up instead of Edge. Weird how the video shows that he is on wifi and on the next part, it shows him with full 4G. Maybe that is a small detail that should be mentioned?
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
i got that also but ur on the right path, i did a speed test and its in fact 4g but the 4g icons hasent shown up for me on pac rom. Don't know where the H come from. i know on the motion 4g it does the same on the CM10 roms where 4g icon doesnt come up making it look like you dont have 4g.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Right after flash 20b kdz, no signal for him (wifi is on though). Then he used LGRecoveryTool to flash radio and got signal.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
Correct
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Perhaps you need to turn off wifi at this point? I hope I'm finally on the right path. This time around, I'm following the video step by step. Oh, and I meant to type that I have 4G and not H.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
What? You didn't follow the video before? I thought you've followed but no success like me.

I followed the video step by step but just cannot get bl unlocked. Each time I run "adb reboot oem-unlock", the phone just reboots normally, no prompt ask to confirm unlock. :crying::crying:
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
xD lmao x)
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
No....I was following other instructions. So far, I used fastboot to erase everything and then flashed ICS u and x. I went into download mode and installed 10g. After that, I flashed euro 20b....I connected to WiFi and waited 40 minutes.

At the last minute, I decided to follow the video and root with the RootLelusJB, install the L9Recovery.apk, reboot into CWM and flash the radio.

I turned on packet data and turned off the WiFi. Now, I'm waiting.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
Keep us posted, i know ur there.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
I googled and found how to get into Download Mode here:

http://androidforums.com/connect-4g...-lg-connect-download-mode-soft-brick-fix.html

How to installed 10g in Download Mode? Just use the tool we used to flash 20b kdz? Thank you.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Yes. Use the LG offline flash method. Good luck!!! :)
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
this sounds like one of the most likely to work things so far. Ill try it if t works for you
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
If this doesn't work, I'm going back to 10g again....copy the 10g root bin file....run RootL9 for ICS and reboot.....install L9Recovery.apk but not run it....flash euro 20b....copy over the 20b root bin file....run RootL9 for JB....install L9Recovery.apk and run it this time....reboot....and follow the rest of the video only using packet data and no wifi at all.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
Where are you so far?
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I just issued the adb oem-unlock command and guess what? DID NOT WORK.....this will be the final try. I'm getting mad and do not want to smash my phone to oblivion. :D
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Thanks again for your report. :good: It seems the best resolution for us now is flash v20b kdz, then flash a rooted stock rom as per this link:

http://xdaforums.com/showthread.php?t=2136204
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
weird are you on metro or T? did you flash 10b with offline method, root + install recovery apk, than tried unlock?

My Steps: where as follows....

1.I had stock 10b out of box (MetroPCS)

2.Flashed offline using RootLelusJB method.

3. installed the recovery apk.

4. and than for unlocking i just followed the video exactly.

did you replace the bin file exactly when he said?
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I'm trying again....just flashed 10g and rooted it....installed L9Recovery but did not run it.....as per video, I am now flashing euro 20b and going to root it and not use wifi this time....Then, just follow the steps provided in the video....I am now doing it as shown in the video, guys.

---------- Post added at 06:04 PM ---------- Previous post was at 05:48 PM ----------

Okay.....I did not apply a reset and now it's behaving differently when the screen shuts off.....instead of the decreasing circle, it kinda flashed like it was going into CWM.

---------- Post added at 06:10 PM ---------- Previous post was at 06:04 PM ----------

This time, I did it exactly as shown. No shortcuts. Now I have to wait again..... You can't say that I haven't tried, guys...lol.
[LG Optimus L9 P760, P765, P768, P769] Versatil2010:
Good luck lol

Sent from my LG-P769 running PAC-rom 4.3
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
This will be my last attempt. If it works, then I will detail how it was done. If it doesn't, I'm selling it to my dad. He prefers stock over CyanogenMod.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Best of luck! Finger crossed :fingers-crossed:

---------- Post added at 07:33 PM ---------- Previous post was at 07:12 PM ----------

I'm still at rooted 20b kdz rom with inverted screen and locked BL. If flash 10g, will the screen issue be fixed automatically?
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
You need to install Busybox for recovery to install
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Issued the command and..............just rebooted. Ugh. I feel like giving up. :crying::crying:
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Got another problem: when I try to run "fastboot erase ***" command, got an error says "Wait for device". I checked my device manager, ADB interface is installed. Anyone get a clue? :confused::confused: Thanks in advance.

---------- Post added at 08:06 PM ---------- Previous post was at 08:01 PM ----------

You do need a break now. Let's wait and see if there's any new way to do it.:)
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Use the start executable in the fastboot folder. Choose what you want and follow the prompts. I am so pissed right now.

---------- Post added at 08:22 PM ---------- Previous post was at 07:55 PM ----------

I'm beginning to believe that this is not for the P769 variant. The adb command just isn't working.....I have never had a phone give me so much stress.

I wasted my entire day on this stupid thing. And nothing.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Me too. I spent whole night last night trying to unlock the BL. Although I'm a noob, I've rooted/unlocked lots of phones so far, this's 1st time failed with instruction. :crying::crying:
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Don't feel bad, if I had the money I would give you mine. Another thing, there have been several people of other variants that couldn't unlock as well. So it's not only a P769 problem.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
It's either what I posted or T-Mobile is blocking the bootloader token.

---------- Post added at 08:51 PM ---------- Previous post was at 08:41 PM ----------

I just finished flashing the euro 20b kdz....again. I'm showing elpuertorro that I have tried more than 3 times. So.....if this doesn't work, it's not from a lack of trying.

I have duplicated the steps shown....even copying over the bin file at the same time as carloswii5. Let's see what happens.... I doubt it will work.
[LG Optimus L9 P760, P765, P768, P769] asciix:
I'm not sure if it's a service provider that is blocking something, as I do recall a few people have unlocked the phone with an inactive sim. Whatever is preventing the bootloader from unlocking is most likely on our device. I did try a few times with my SIM card out, it didn't work.
[LG Optimus L9 P760, P765, P768, P769] SovereignKnight:
I know what you mean! I spent a whole night w/o sleep trying to get my P769 to be unlocked so I could enjoy CM, but unfortunately it ended badly with the Security Error screen. I jacked it up so bad I could not even use the LG tools or Fastboot to fix it! I had to put in a claim replacement. I have my new 768BK now and you can be rest assured I'm not attempting this again until there is a "Full fledged easy to use toolkit" that fixes this! I'll just stick to root for now.
[LG Optimus L9 P760, P765, P768, P769] oldcotton:
Dude, you better take a break. Not worth spending so many time to unlock it. FYI, I just flashed with rooted stock 20f. I'm gonna delete unwanted bloatwares and that's it.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I'm going back to stock.....this has been a waste of time.
[LG Optimus L9 P760, P765, P768, P769] Lelus:
anyone else wants to contact lg and request the source code of xloader and uboot ? I think they are bound by the gnu gpl to release it.

both kindle fire hd and nook tablet use same cpu as l9s and exploit a bug in uboot to bypass signature check.

opensource@lge.com
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
Consider it done Lelus :p
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Can someone tell me what the point of rooting and installing L9Recovery.apk is? I was shown another thread by twinnfamous explaining the unlock process.... he didn't mention anything about needing to install L9Recovery.apk or it wouldn't boot to that unlock screen. :-/
[LG Optimus L9 P760, P765, P768, P769] SovereignKnight:
I know what ya mean! I want CM on this phone soo bad i can taste it. I'm just afraid to try and unlock the boot loader now. I screwed my last p769 up and just got this replacement. LG please unlock the boot loader for the p769!
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
You need it eventually to flash the touchscreen and screen fix as well as the ROM you want to install, also if you **** up the backup you took before beginning this torture of an unlock process
[LG Optimus L9 P760, P765, P768, P769] saiarcot895:
For what it's worth, I emailed LG regarding unlocking the bootloader on a T-Mobile P769:
[LG Optimus L9 P760, P765, P768, P769] elpuertorro:
That was for doing it the video way you need to root and inst recov to flash the radio after, but as you read i didn't do that part ( as recommended by lelus and kuma forget about root and just unlock) and rooted after i had already unlocked.

oh and people don't forget to have adb usb debug on and put the phones lg mode when connected to usb.
[LG Optimus L9 P760, P765, P768, P769] saiarcot895:
Also, I'm not sure how relevant this is for this phone, but for the LG Optimus 4X HD, all unbranded phones should be unlockable, and that the phone itself probably needs an unbranded IMEI and needs to be running an unbranded firmware.

http://xdaforums.com/showpost.php?p=40098453&postcount=86
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
meaning we may be screwed. The joys of owning a LG phone. :p
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Sent request. Yes I believe at least the u source we are entitled too.

---------- Post added at 10:54 AM ---------- Previous post was at 10:10 AM ----------

Also when I remove my backplate says p769 ap below battery.
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
Guys my phone says p769 AP under the batter as well.

anyways i just noticed that behind the battery, on the phone, it shows the phone's serial number and thats the same number that shows up on the imei website that Lelus asked for.
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
Are we still gathering serials?
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
All right. Final experiment. I have decided to forget using the P769 x and u and instead flashed the P760 versions. I then flashed the 10g kdz and finally the euro 20b kdz. This time, I did not root and install the L9Recovery.apk and neither did I applied a reset. I am just letting it sit there for an hour.....kinda doubt it'll work but what the hell.
[LG Optimus L9 P760, P765, P768, P769] Lelus:
Actually it doesn't matter which x and u you flash as long as it's from ics. Basically the reason for it is just to ensure that 20b will overwrite x and u with it's own versions and you'll get mirrored lg logo startup.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
No....didn't work. This command just doesn't work. Both the video tutorial nor the other steps worked.
[LG Optimus L9 P760, P765, P768, P769] lord_trauma:
Encrypting

While following this video tutorial I completed all the steps until I reached the reboot after flashing the radio. Once I did that it rebooted and stays on a screen that says encrypting and has a button to reset phone. I am unable to get past this.
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
That sounds like the omap nvram could be corrupted (which I'd like to try with a jtag). Try the lelus fastboot method to see if you can recover.
[LG Optimus L9 P760, P765, P768, P769] lord_trauma:
I cant. The phone is basically shut off from all useage at this point.
[LG Optimus L9 P760, P765, P768, P769] zironia:
Had same problem when I updated busybox. Had to boot into cwm and recover. If you can't get into cwm will have to flash kdz again. Newest busybox seems to be the culprit.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
I just had a random noob thought here. If T-Mobile uses a persistent.img in their kdz, maybe we can use a different 10g? Makes sense or not?

---------- Post added at 08:35 PM ---------- Previous post was at 08:27 PM ----------

Maybe the Windmobile 11A?
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Alright people I need a NV partition from a unlocked phone. Came across a string of 01 and 02s in the partition that is only values no data. Your imie and info is in this partition. If you can hex edit a file I will give you the location of the values and you can just give me the values. Will also need to know if your sim locked or not. [MENTION=4447066]kuma82[/MENTION]
[LG Optimus L9 P760, P765, P768, P769] kuma82:
I'll send you the image, don't worry I know where it's located and I'll just change it to 1234567... give me sometime though, I'm at work.

Oh and I'm SIM locked
[LG Optimus L9 P760, P765, P768, P769] SomeGuyInOz:
I can send you mine... if you can tell me how to extract the partition (adb commands, etc). Thanks.
[LG Optimus L9 P760, P765, P768, P769] kuma82:
Alright here is the image (below), I've renamed my imei & mac address to 12345 etc.

Check out line 00001a00-00001a20

it contains this

LGP760AT-01-V20b-310-260-MAR-03-2013+0

and line 00003c00 - 00003c10

6260_MODEM_SIC_01.1232.00

other than my imei & mac i don't see anything else.
[LG Optimus L9 P760, P765, P768, P769] kuma82:
here is the command

adb shell su -c "dd if=/dev/block/mmcblk0p7 of=/sdcard/nv.img"

this will put it on you internal sd or sdcard (depends)
[LG Optimus L9 P760, P765, P768, P769] rahulsnair:
Hai there...

This is Rahul S Nair talking in behalf of Samsung Galaxy Grand Quattro development (qualcomm blooded device).. I m a dev working for this device for creating a cwm... I successfully found a suitable method to root it formely.. But when we reached to cwm level we found that the device is not at all taking custom recoveries .. even a moded stock recovery is not being showing up.. whenever custom recovery flashes it ll give a black screen and reboot... after a long investigation we figured that this device have a locked bootloader.. Is it possible for anyone here to unlock this guy....
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
[MENTION=2159458]Lelus[/MENTION]

Thank you for your interest about our mobile phone.

*

“We received your request on LG Open Source Code Distribution site(http://opensource.lge.com).

This site is just for providing source codes of FOSS(Free and Open Source Software) we have used in our product.”

*

We don’t use u-boot for our product you mentioned.

We use lk bootloader which is not GPL as you know.

So we can’t release any source codes you requested.

*

We hope this information will help you.
[LG Optimus L9 P760, P765, P768, P769] MoonMaster345:
I don't know how 2nd init works on Qualcomm chipsets, but you should ask other qualcomm device developers because here we use Texas instruments chipsets