yashsingh1/xdaforums huggingface dataset:
[LG Optimus L9 P760, P765, P768, P769] Kenchinito:
I tried all this to the letter. But when I have to type the "adb reboot oem-unlock" command, the phone just reboots. Yes I did wait 30 minutes, it has been like 4 hours now and no prompt appears. I made sure the phone was connected to the internet.

What could be wrong?
[LG Optimus L9 P760, P765, P768, P769] Alucai Vivorvel:
Go through like any page of this thread, most of us have this problem. Chances are the bootloader is encrypted, which makes it impossible to unlock.
[LG Optimus L9 P760, P765, P768, P769] satyanand.kommoju:
encrypted bootloader?

Very dumb question.

If P769 is having a encrypted bootloader, is it possible to read the image using a HEX editor and make sense of it.

I have read through the x and u images and found couple of strings.

I'm under the assumption that it is not encrypted, but may be checking a hash post load. Not sure.
[LG Optimus L9 P760, P765, P768, P769] nhoc_maruko9x:
Almost lost hope until read this thread. What a life saver! Just follow youtube video instruction (I even skip some steps), and now my bootloader is unlocked :D Today's gonna be a good day :D
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
Not a dumb question, but this has already been attempted several times to no avail. The strings themselves are not encrypted. Unfortunately our bootloader is a LK ( little kernel ) bootloader which is NOT open source. Hence the main issue. We've even had a LK assembly programmer look in to it and he didn't have any success either.
[LG Optimus L9 P760, P765, P768, P769] nhoc_maruko9x:
And now I can't revert to normal touch screen :(
[LG Optimus L9 P760, P765, P768, P769] satyanand.kommoju:
Thanks for clarifying. For me this thread is a full of new knowledge. Thanks to all the participants. Hope we will be able to unlock the P769 bootloader.

I myself tried the unlock procedure couple of times with no luck. Now i know why it's not doing so. I doubt if the presence of TMO SIM in the phone is crucial, i do not have it when i did the unlock. The guys who ever unlocked successfully might have having the original SIM with them when they unlocked. Just a random thought.
[LG Optimus L9 P760, P765, P768, P769] nhoc_maruko9x:
No I'm using another carrier SIM and I still can unlock it. Actually the process is pretty simple, just so much time for download files (I didn't wait 30 mins before unlock).
[LG Optimus L9 P760, P765, P768, P769] satyanand.kommoju:
That's fantastic. The screen can be fixed rather easily i guess. Would you be able to provide an upload of x and u boot images from your device?
[LG Optimus L9 P760, P765, P768, P769] Alucai Vivorvel:
What is the manufacture date of your battery? Take out the battery when it's powered off and check on the back. Mine for example says 2013.06.25(L) in a white field near the bottom. I believe it was devices whose batteries were made in June or later are of a different revision which locks the bootloader more securely. However, if yours was made in June or later, there may still be hope yet!

I've all since given up on ever unlocking the thing, especially since I got a different phone, but I'd be willing to try again. For science!
[LG Optimus L9 P760, P765, P768, P769] nhoc_maruko9x:
Yeah the screen fix is simple as well, I've just bought this L9 so it takes a while to read some topics :D And I think I must read more topics to know how to get x and u boot images :P

Mine is 2012.07.26; when I check IMEI on imei.info I get information:

Esndate: 20130307

Network: TMO

Esnoutgodate: 20130312

But it's earlier than June anyway.

At first, I run adb reboot oem-unlock from P769 ROM (V20H) but nothing happens, it just reboots. Then I flash V20B_00.kdz and screen goes crazy and mirrored (except LG logo at boot, it's still normal). After that, no 30-min wait, I run oem-unlock and yay, unlock screen appears, asks me to confirm, so I press Up volume button and everything is done.
[LG Optimus L9 P760, P765, P768, P769] satyanand.kommoju:
use the following list of commands to get those images.

after connecting your device issue,

adb shell

dd if=/dev/block/mmcblk0p1 of=/sdcard/x-loader.img

dd if=/dev/block/mmcblk0p2 of=/sdcard/u-boot.img

Those two commands will dump the bootloader images to sdcard.

credits to [MENTION=4447066]kuma82[/MENTION] for the commands.
[LG Optimus L9 P760, P765, P768, P769] nhoc_maruko9x:
Ok here: https://db.tt/LdZTDJe2
[LG Optimus L9 P760, P765, P768, P769] satyanand.kommoju:
Thank you!. Downloaded the same.
[LG Optimus L9 P760, P765, P768, P769] Alucai Vivorvel:
Sorry for the late reply. That confirms it then, the unlock command will only work on devices made earlier than June 2013.
[LG Optimus L9 P760, P765, P768, P769] LaDY Vengeance:
Uhhhhhhhgggg....why do I keep coming back to this damn forum. It's like looking inside an empty refrigerator hoping to find food.
[LG Optimus L9 P760, P765, P768, P769] Alucai Vivorvel:
XD

It's unfortunate just how accurate that simile is.
[LG Optimus L9 P760, P765, P768, P769] stunts513:
I kinda have to agree with that... I've been sticking to the kindle community because of this. Similar hardware and a bootloader exploit...
[LG Optimus L9 P760, P765, P768, P769] tokenpoke:
Not if you have an hdx x@

Device #2 that went straight to my gf after a random forced ota.
[LG Optimus L9 P760, P765, P768, P769] chris.domingo:
LG Recovery Installer

Has any one tried LG Recovery Installer. It installs CWM Based Recovery 6.0.1.2 and seems to work on the lg p769 i haven't tried a CM Rom yet

would this also allow me to install a cyanogenmod custom rom
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
Yes, the recovery installer is known. It is for locked bootloader devices. The only way you'll be able to install CM or any other custom ROM is to first unlock your bootloader.
[LG Optimus L9 P760, P765, P768, P769] abby4625:
l9 p769 touch not working correctly after flashing to v20B

I flash the stoch v20b rom on my l9 p769, according to the video, after suceesfully flashing to v20B,i observed that the root permission has gone and also it does not boot into recovery. Then after that i reflashed to the stock rom 0f p769 which was v20h. The touch of the screen goes bad as it was on v20b. Is there any method to fix the screen touch. I am stuck badly on this, plz help
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
Download the V20F touchscreen fix by [MENTION=4447066]kuma82[/MENTION] here

This must be flashed via custom recovery.
[LG Optimus L9 P760, P765, P768, P769] Lite2012:
help me plz :(

i have tried this method and all other methods to unlock my bootloader

i have a P768 and i successfully flashed P760 V20B KDZ on it

but i can't unlock the bootloader -_-

i follow the instructions correctly but when the phone reboots

no fastboot appears and it boots normally

what can i do ? i need to install a KK rom urgently :(
[LG Optimus L9 P760, P765, P768, P769] Cobra11Murderer:
im in the same boat.. and my phone was made in jan 2013.. idk what im doin wrong here.. i connected to wifi, tmobile sim installed, waited 45 mins.. did the command and boom reboot nothing else
[LG Optimus L9 P760, P765, P768, P769] Cdbarron727:
wow! thats a novel of a forum

I gave up my galaxy exhibit running Beanstalk to the wifey. Now I picked up this P76920h (4.1.2) from a friend and I come to find out that LG complied with making it a pain in the rear to unlock the bootloader on this thing.......without reading the 242 pages....is there a way that someone could let me know if this method does work..and if I do get it unlocked....will I be able to install a custom rom? Or am I just wasting my time?:confused:
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
We've determined that the bootloader on any TMobile branded P769 made around March 2013 and newer IS NOT unlockable. Way to go TMobile. I myself, and several others, have moved on the the L90, which is slightly better than the L9 and it's bootloader IS unlockable :D

There are some themed ROMs for the L9's with locked bootloaders and there are a couple 2nd-init recoveries too. If you do manage to get it unlocked then you'll be able to pretty much do whatever you want with the device. ROMs, kernels, recoveries. Best of luck :)
[LG Optimus L9 P760, P765, P768, P769] Cdbarron727:
Thanks for the response...I'll give up on it being that it wouldn't be something that I would even be capable of figuring out...at least I have titanium backup and was able to de-bloat......any way to increase internal storage with an app like A-parted? (That's what I did with my exhibit)...,I'd rather improve it the best I can until I get a new one: -)
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
http://xdaforums.com/showpost.php?p=52444909&postcount=344

Is this legit? Any testers?
[LG Optimus L9 P760, P765, P768, P769] jwgarvey:
My tmobile p769 was produced march 1, 2013. Should i even attempt this?
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
Only if you have a bunch of free time...
[LG Optimus L9 P760, P765, P768, P769] drgenetix:
Downgrading??

I am running JB 20h currently, what if I downgraded or flashed a rom can I unlock the bootloader then? My fone is August 2013 build :@
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
The unlocking process requires flashing older kdz files. However it most likely wont work with the p769. Like I said earlier, if you have a bunch of free time...

Sent from my LG-D415 with Tapatalk
[LG Optimus L9 P760, P765, P768, P769] Cobra11Murderer:
I dont get it.. why is it that the L90 is unlocked and yet this phone is such a pain in the ace to do.. my avant will be in today praise the lord! lol but still it angers me that the L9 is such a hard ace
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
I don't get it either. I gave up on the L9, tho I still have it as a backup phone, and moved on to the L90 even tho I swore I wouldn't buy another LG device after the issues with the L9. It may be that with all the questions about the bootloader on the L9 that LG and T-Mobile decided to leave the bootloader alone, on the US variant (D415) of the L90.

What I don't understand is why they want so much control over the devices they sell, especially the pre-paid market. My L9 cost me $200 out right because I don't do contract service plans. I should have full rights to the device. No different than a computer. I can understand in the short term for contract service, but for pre-paid service??

Rant over... for now! Lol

Sent from my LG-D415 with Tapatalk
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
So like was this guy banned because he was ****ing with us?: http://xdaforums.com/showpost.php?p=52672665&postcount=286
[LG Optimus L9 P760, P765, P768, P769] Cobra11Murderer:
Pretty much
[LG Optimus L9 P760, P765, P768, P769] bulletfreak:
http://www.extremetech.com/computin...encryption-and-security-put-it-in-the-freezer

http://www1.cs.fau.de/frost

i think i may have found something that can help us

I mean anything's possible. At this point it's either brute-force or something like this.

---------- Post added at 06:44 PM ---------- Previous post was at 06:19 PM ----------

A port of this would also be interesting: http://unlimited.io/jbhboots.htm
[LG Optimus L9 P760, P765, P768, P769] Cobra11Murderer:
I'm not sure if there's much interest in pursing that though, that's a bunch of work it seems
[LG Optimus L9 P760, P765, P768, P769] NWLONEWOLF87:
I hate this phone... I don't have T-mobile service so I can't even do the 30 minute wait thing. smdh :mad:
[LG Optimus L9 P760, P765, P768, P769] sptrshi_13r:
Does this method work for P765?
[LG Optimus L9 P760, P765, P768, P769] BlueKnightedDragon:
It should but you don't need to worry about a touch screen fix or smoky touch screen cause the p760 and p765 are identical. You only need to flash the p760 20b kdz and then run the unlock command
[LG Optimus L9 P760, P765, P768, P769] lancerleyja:
pretty new to this

Ok ive tried all three with my rooted lg l9 p769 ....link2sd only saved me a little space not enough to make a big difference ,directory bind i couldmt figure out what to do fory specific device ,ext2sd worked great but i still get the insuficiant storage message one i hit my 2g internal cap any suggestions
[LG Optimus L9 P760, P765, P768, P769] frossard06:
help please

When this in the review process , to the point that checks the battery my stop .Diz that the battery is low , and this fully charged. Do you know why that?
[LG Optimus L9 P760, P765, P768, P769] SupahNinjahBoi:
Need to Update my LG Optimus L9 P769 to at least Kitkat 4.4

I've read that if your LG Optimus L9 P769 was made after June(?) 2013 then you will not be able to unlock your bootloader, however mine was made in 2012. My question is will this method work for me? As stated in the title I need to update my OS past Jellybean 4.1.2.

Another question I have is will I be able to do this process on Windows 7? I watched the video and saw that he chose to change the compatibility of a program to Windows XP (I think..).

Also, does anyone know how to backup nearly everything on my phone so when I do install a custom ROM for Kitkat 4.4 I can just recover everything (contacts, messages, pictures, videos, etc....everything basically :p)?

And lastly, is there a trusted and stable ROM for Kitkat 4.4?

---------- Post added at 08:17 AM ---------- Previous post was at 08:13 AM ----------

I've read that for some reason the phone thinks its at 1% battery instead of 100%. Try draining the battery to 80-90% and try again.
[LG Optimus L9 P760, P765, P768, P769] Jaymanducato:
Stuck at the end

SO i got all the way through the tutorial then when i get to the end where i was entering the "abd-reboot oem-unlock" command it wouldn't come up with a screen asking if i wanted to unlock the bootloader. PLease help!
[LG Optimus L9 P760, P765, P768, P769] shinobisoft:
There is not supposed to be a hyphen '-' between ADB and REBOOT
[LG Optimus L9 P760, P765, P768, P769] fler_tb:
Can you re-upload dropbox link with zipped "Adb" "Recovery image" "V6.bin" and "V20_00.bin"? Provided link is dead. Thanks :good:
[LG Optimus L9 P760, P765, P768, P769] danygsm80:
Thank you very much, it's working very well on my LG P769 on witch I installed an european firmware not knowing that is not compatible with the phones bought from United States so my touchscreen did not work anymore untill I foun your thread an tryed your solution.
[LG Optimus L9 P760, P765, P768, P769] ggfool:
the V20B kdz is the second link in this guide (http://xdaforums.com/showthread.php?t=2198114) correct?

i would be happy to download it and all of your files and upload them somewhere as a single package.
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
Matches.. And take you very much..
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
Yes it is forgot about that one... And would also be very appreciated
[LG Optimus L9 P760, P765, P768, P769] ggfool:
i have PM'd you the upload link because i cannot post outside links yet due to my low post count.

please let me know if there are any problems with it.

i just noticed that i missnamed the rar file as "L769" instead of "P769" somehow i mixed this up, but i assure you it is for the P769
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
Thank You Very Much
[LG Optimus L9 P760, P765, P768, P769] ggfool:
No problem at all, glad i could contribute something (though it is something very small) to the community that has helped me so much!
[LG Optimus L9 P760, P765, P768, P769] kuma82:
http://xdaforums.com/showpost.php?p=43984203&postcount=239

Look up :rolleyes:
[LG Optimus L9 P760, P765, P768, P769] ggfool:
now that i am starting to do this i have one quick question

at the start it says under tips "Bootstrap recovery APK is installed before flashing v20B" does this mean we simply run the L9RecoveryInstaller_1.5.0apk on the phone? or is there some other method for installing this?

thank you in advance!
[LG Optimus L9 P760, P765, P768, P769] isaiahhhhh:
This may be a silly question, but in reading through some of the posts on this thread I was wondering, do I need to have a cell signal for the bootloader unlock to work? I'm assuming from the instruction to leave the phone alone for 30 minutes that I do need a cell signal which makes me hesitant to perform this operation as I live in the woods away from any signal.

Thanks in advance.

***Edit***

I just watched the video and got my question answered, my apologies. I'll just have to wait for a different bootloader unlock method, or just do it when I get back to school.
[LG Optimus L9 P760, P765, P768, P769] rottenralph:
thanks for the great video. i got one problem tho, my touch screen still not fixed. i flash the cwm_ts_fix_p769 and reboot, i still got mirrored screen. i need help. please. thanks
[LG Optimus L9 P760, P765, P768, P769] BioDesigner48:
Just curious, if I screw up in the middle of all this well it brick my phone?

sent from my locked rooted P769 v20f

I'm on YouTube (BioDesigner48)
[LG Optimus L9 P760, P765, P768, P769] kimtyson:
Carlos, you are the man! You have really helped a bunch of us here. Not only with this video but also with your other works. Even though there were some glitches along the way you don't give up. Great job on the video. (Though you could edit out some of the waiting time but I am NOT complaining.) Very grateful sir! Now I can actually feel confident that I can get this done.

---------- Post added at 10:30 AM ---------- Previous post was at 10:27 AM ----------

It's pretty hard to brick these phones. What might happen is you would not be successful in one of the steps. But it wouldn't brick. Then, you'd have to restore a KDZ or a Nand. I say go for it.
[LG Optimus L9 P760, P765, P768, P769] BioDesigner48:
Ight thanks, as for the waiting time in the video, I'm glad he left some of it cuz we get to see more of how the process goes and such.

sent from my locked rooted P769 v20f

I'm on YouTube (BioDesigner48)
[LG Optimus L9 P760, P765, P768, P769] redspeed:
I just flashed the V20F kdz as I bricked my phone earlier.

Im not rooted currently, do I need to be rooted first for this to work and install CWM first too?
[LG Optimus L9 P760, P765, P768, P769] nullvader:
I followed the video step by step using V20f, the reboot command to unlock does nothing. :( I'm stuck with V20b, inverterted screen and bad touch screen. What do?
[LG Optimus L9 P760, P765, P768, P769] Ilxaot:
Flash V20F using the same exact method, and then flash the zip I've included to fix your digitizer. You may need to root and install busybox and recovery again with the messed up touch screen, sorry lol. It's annoying but easy after a while(:

BTW, TO WHOEVER POSTED THIS ZIP I'M SORRY BUT I HAVEN'T BEEN ABLE TO FIND YOUR POST, BUT TO WHOEVER YOU ARE, THANK YOU.
[LG Optimus L9 P760, P765, P768, P769] emir11553:
Samething happen to me so you have to restore a nandroid backup and flash the touch fix and you are good to go
[LG Optimus L9 P760, P765, P768, P769] kuma82:
So does anyone have confirmation that this way works? I was under the impression that you can't turn off your phone, before issuing the unlock command.

https://plus.google.com/app/basic/stream/z13pxhrrjv3sjtoe423wjzkagyveej4wa04
[LG Optimus L9 P760, P765, P768, P769] Ilxaot:
Yeah, it's easy aha. (: If you have a locked bootloader, check out my locked bootloader mods thread. It should have some fun stuff to flash(:

http://xdaforums.com/showthread.php?t=2381273
[LG Optimus L9 P760, P765, P768, P769] redspeed:
My phones messed up now too. I flashed the V20b per instructions and when it rebooted I didnt have the mirror image screen, although it was still cut in half and the touches are messed up. I had signal too.

The LG tool wont recognize the phone anymore either so I cant flash any kdz

please help!
[LG Optimus L9 P760, P765, P768, P769] cjweng:
same here.

Flashed to 20f before everything starts.

Flashed to 20b, the start up logo didn't get mirror

then flashed to 10g then 20b, logo mirrored, follow all the steps(flash radio, get signal wait 40 mins), didn't work. oem-unlock only reboot.

for some reason, I can't root 10g , but rooting JB works fine for me. just flash back to 20d root and fixed the touch fix.

back to start point.

I start to dislike this phone.
[LG Optimus L9 P760, P765, P768, P769] BioDesigner48:
So now people are having problems with the 20b kdz for nothing:confused:

Well I guess imma wait a little longer to unlock bootloader :(

sent from my locked rooted P769 v20f

I'm on YouTube (BioDesigner48)
[LG Optimus L9 P760, P765, P768, P769] Ilxaot:
Bio, check out my guide on customizing stock and some mods for stock if you haven't already, your phone will fly when its done with it (:
[LG Optimus L9 P760, P765, P768, P769] BioDesigner48:
Actually I did, I'm very impressed:D Even gave a thanks. I'm thinking about using that thunderbolt.zip for helping my battery, have you flashed it yet on yours? And does it work?

sent from my locked rooted P769 v20f

I'm on YouTube (BioDesigner48)
[LG Optimus L9 P760, P765, P768, P769] dinhhviet:
Were you able to fix the problem? In order for the LG tool to recognize your phone you need to have debugging mode on and "install from unknown sources." It might be tricky to turn those on with the screen messed up but you should eventually figure it out. Just try to enable "show touches" in developers options, it will help a lot. Or if you have a bluetooth keyboard/mouse that would help. You can use the guide here to flash back to V20F http://xdaforums.com/showthread.php?t=2085344

I followed the video but installing bootstrap APK failed after flashing V20b.
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Find the fastboot thread and use the script to flash the ics x and u partitions so LG tool recognizes phone.
[LG Optimus L9 P760, P765, P768, P769] creepinm3:
Followed the video down to a T... got stuck at the "adb reboot oem-unlock" part. Went to sleep so I didn't have to wait the 30 minutes, woke up and ran the command, the phone just restarts itself. No screen shows up about unlocking bootloader. http://www.youtube.com/watch?v=WyNtFP_TkKc

Edit: I am restoring V20F and going to root and TRY again to install recovery one more time. I cannot get the "adb reboot oem-unlock" to work at all, I get a constant reboot.

Edit 2: So I tried to restore to JB and re-root with the .kdz bin file. Got a soft brick "security error" now trying to fix this issue. I got the device into S/W upgrade but the tool says "your device has the latest software available." So now I must find a work around for this... any ideas?
[LG Optimus L9 P760, P765, P768, P769] SpartanG01:
Ok so the majority of the posts here are about this not working, bearing that in mind I have a question before I attempt this

I have an LG P769 Tmobile US 20F (Stock OTA) I bought it last week brand new. Never been rooted, flashed or modded. What are the chances this method works with my device without screwing anything up?

I have a p509 that I flashed successfully the first time to CM7 no problem so I'm not unfamiliar with the process but the more I read about this phone the P769 the less faith I have I'm ever going to get CM10.1 on it lol
[LG Optimus L9 P760, P765, P768, P769] dinhhviet:
It's hard to completely brick the phone but it may be hours trying to restore your phone. To be honest I would hold out until an easier method is found.
[LG Optimus L9 P760, P765, P768, P769] omgbossis21:
Does the video flash 10g first,out of curiosity...
[LG Optimus L9 P760, P765, P768, P769] SpartanG01:
Does this actually work though? Is it confirmed to allow you to install a custom rom on my version of the P769? 20f from Tmobile US? If I know it works I'm sure I can accomplish it but I don't want to waste my time and frustration on something only like one person has ever managed to get working properly lol