yashsingh1/xdaforums huggingface dataset:
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
HOW TO START PHONE IN CWM RECOVERY MODE (Proper Method):

Switch off phone or if stuck Remove the Battery and insert it after few seconds. And now do the 3 button combination with following...

First press VOLUME.UP and HOME button together do not release it till end. Then Press Power button only for 3 seconds and release power button. (But dont release Volume.Up and Home button and KEEP BOTH PRESSING until phone vibrates and LG logo appears!

Your Android should be now in CWM mode.
[LG Optimus L9 P760, P765, P768, P769] OperationNT:
Hello,

I did this tutorial on my P760 and it works perfectly :highfive: (the only difference I made was for the recovery file, I used the last version 6.0.3.1 instead of the on given on this thread :) ).

There was only one detail I didn't understand. When you are asked to confirm with Vol+ if you are sure to unlock the bootloader, it said it will reset your device to factory settings : it did not :D .

Thank you for the tutorial ;)
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Glad this Tutorial helped you. :highfive: I know I am on same new CWM 6.0.3.1 but not updated here. kindaa lazy. JUST UPDATED NEW CWM. Old also there for backup.:D

They said it will reset your device, because people are lazy/careless to BACKUP the phone. Even I keep telling people to take nandroid backup of phone before flashing KDZ but it does not wipe data. :D

See last line of my signature. :D
[LG Optimus L9 P760, P765, P768, P769] OperationNT:
I was wondering : once the bootloader is unlocked, do I need to wait 30 min again if I want to re-flash the recovery ?
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
No. Wait Only once while unlocking. Its one time job. Its nothing to do with flashing/reflashing.

Btw u cannot lock it later. At least not now.
[LG Optimus L9 P760, P765, P768, P769] OperationNT:
Thank you for your answer.

Yes, I understand that : I read an article which explain that unlocking bootloader writes in eFuse (a kind of "single time writable memory"). And for having eared about it on XBox 360 hacking scene, I seriously doubt it will be reversible.
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
thats possible. but no confirmed report yet.
[LG Optimus L9 P760, P765, P768, P769] donk165:
Well i'm unsure if its only me and my phone. But I relocked my bootloader unintentionally. I unlocked it with this method, and then after putting V20A P768, My bootloader appears to be locked now. In software update mode (power off - vol up + plug in usb), it no longer says bootloader status: unlocked. I may have found a way to relock bootlodaers, by flashing the V20A Mexican ROM rom, it may work on other L9 variants - this is untested, and again, it may only be my phone which this happens?
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Do you get fastboot screen with "adb reboot oem-unlock" with option to unloack? Or it does not go in FB mode at all?
[LG Optimus L9 P760, P765, P768, P769] donk165:
I get nothing after typing that command. The phone just reboots normally. Im not sure if this has anything to do with me possibly replacing the u or x boot on my phone with omap4boot. I dont have a backup of this file so my phone is listed as a "U2" as the device ID - not P768. No fastboot as far as I can see. I might try the omap4boot guide again and see if I can atleast get fastboot up.
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
First clear that mis-conception that your device should not show as U2. And why not? It really does not matter.

Firstly, when I connect my P765 to Samsung Bluray Player in Mass-Storage mode, it shows in TV Screen as "U2". When I connected it to Samsung LCDTV with DLNS, it also showed connected device as "U2" and it works fine everywhere. Its simply normal if other device does not recognize the name of phone properly.

I am "not ruling out" as it may not be the reason, but this way your troubleshooting may go in wrong direction. You should look for other possibilities of issues also, instead of stressing why it is showing as "U2".
[LG Optimus L9 P760, P765, P768, P769] Lelus:
U2 is l9s motherboard model name
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Thanks a lot. That clears fog. He was mentioning in other thread also why it is showing as U2 instead of P768? lol
[LG Optimus L9 P760, P765, P768, P769] Lelus:
For those advanced users , especially p765 and p768 who are on jb and can not unlock their bootloader I can suggest backing up then flashing x-loader and u-boot that cmahendra provided and see if unlocking works

also restoring via offline method or lg tool may overwrite x and u, I haven't notice any patterns which kdz version does it or not , it most likely is set in kdz/dll itself.
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
[MENTION=2159458]Lelus[/MENTION], Is it possible that LG might have used eFuse (xbox360) kind of method for bootloader unlocking, which is one-time-writable memory? I mean burning unlock flag on hardware which cannot be changed at all afterwords in any circumstances? Someone was suspecting that in other thread.
[LG Optimus L9 P760, P765, P768, P769] donk165:
Thank you guys, I am sorry. I assumed using omap4boot had changed something on my phone and I thought U2 was a different device. This is why I thought fastboot wasn't working on my phone. I was confused because before I did any flashing on my phone, when I used SD-maid, the app used to show my device as P768@XXXXXX - (firmware name), but it now shows U2@XXXXXX. I guess it was nothing.

Ill try flashing Jellybean and unlocking the bootloader, thomasoeli has since had success with his phone, so I can just follow his instructions.
[LG Optimus L9 P760, P765, P768, P769] donk165:
So, Ive gone to V20B, but I cant seem to get fastboot to work once again?! Im on the P760 rom, V20b. I do the normal command 'adb reboot oem-unlock' and I get a standard reboot.

These are the steps ive taken.

Used online flash to go back to full stock = P768 V10B > Upgraded to P768 V10E > Rooted + CWM via Recovery Installer App > Upgraded to P765 V20A Europe > Tried fastboot mode - Normal Reboot only > Upgraded to P760 V20B Europe > Tried fastboot mode - Normal Reboot only.

Does anyone have any idea, I seem to always have a problem with fastboot mode! I love JB now, I cant go back :D but i dont want to be without CWM!
[LG Optimus L9 P760, P765, P768, P769] Sisqo:
unlocked bootloader and rooted in 1-2 minutes in v20d, great guide, this easy method needs to be implemented to unlock bootloader for every device by htc, samsung, motorola, etc. too bad there aren't any jb roms.. device too new or what?
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Urwc
[LG Optimus L9 P760, P765, P768, P769] donk165:
Update: I used the new recovery installer for JB, i guess ill forget fastboot for now, it doesnt agree with my phone lol :P

Sent from my LG-P768
[LG Optimus L9 P760, P765, P768, P769] aloy99:
I heard in the thread where the p768 user linked to the jelly bean firmware that the BL was locked by the telco?
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Which new recovery installer for JB? Locked or Unlocked? The one which artas182x made for Unlocked BL devices, is not working as per his own thread. May be you are talking about his another recovery installer made for Locked BL, and may have worked on Unlocked BL too. plz Confirm.
[LG Optimus L9 P760, P765, P768, P769] donk165:
I was talking about the 1.5 of the one artas made. http://xdaforums.com/showthread.php?t=2095825. Locked BL. Im running CWM fine now.
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Do you mean to say, you can install recovery with this installer on any raw stock JB rom? just after flashing any JB rom on locked bootloader phone?
[LG Optimus L9 P760, P765, P768, P769] donk165:
Yeah, I just rooted with lelus method then used this new recovery installer, have you not read the change log / updated title for this thread? It supports Jelly Bean and other roms now.

http://xdaforums.com/showthread.php?p=36620368

I dont know whats up with my bootloader but it doesnt say status unlocked in SW update mode.

Sent from my LG-P768
[LG Optimus L9 P760, P765, P768, P769] sganguly:
Just want to share.......I have P765...upgraded to V20A.....unlocked bootloader and rooted successfully with this method posted by cmahendra (Thanx cmahendra for this awesome guide) in post 1 of this thread. I think this is a good news for those having P765.

Please hit the thanks button if I helped.
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
You are welcome. :) Such success stories increases the confidence of more people in the guide. Thanks :)
[LG Optimus L9 P760, P765, P768, P769] Testman08:
does this work on p769 tmobile device? to unlock bootloader and acquire root?
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
Not directly and it is mentioned will work on P760, P765 and partially on P768. You need to go through some more threads to know it better.

But there are P769 people with unlocked bootloader and root, with many alternate methods. Search and read please.
[LG Optimus L9 P760, P765, P768, P769] cheong12001:
I cant unlock the phone even with fastboot and adb driver installed, p765 with europe 20c windows7 64bits
[LG Optimus L9 P760, P765, P768, P769] AkiroX:
Could you please link to those methods? I've searched everywhere... But I'm starting to think updating it to JB was a mistake.. lol.

I wanna install 4.2.2 on this phooone... ;w; I have an LG L9 P769 running P76920d... Little help please? I have expiience in flashing but this thing is a lil complicated with all these models....
[LG Optimus L9 P760, P765, P768, P769] jared407:
when I do oem unlock it just restarts??
[LG Optimus L9 P760, P765, P768, P769] OperationNT:
It should restart your device on a screen which ask you if you are sure you want to unlock your bootloader. Once you confirmed, it unlocks it adn go to another screen where you can access your device through fastboot (if you already unlocked your bootloader, it directly goes to the fastboot screen).
[LG Optimus L9 P760, P765, P768, P769] carloswii5:
You could try my guide http://xdaforums.com/showthread.php?p=41388372#post41388372 or you can try pinoyto's guide http://xdaforums.com/showthread.php?t=2198114
[LG Optimus L9 P760, P765, P768, P769] cris7i:
Same problem here. P760 with 20b.
[LG Optimus L9 P760, P765, P768, P769] jyuuken:
does this work for LG L9 P768 20a -ESA-XX im from the philippines
[LG Optimus L9 P760, P765, P768, P769] rocky922:
Why my phone restarts after comand: adb reboot oem-unlock? It's not entering on fastboot mode;/
[LG Optimus L9 P760, P765, P768, P769] aloy99:
Having the same issue here. I installed the generic Android USB driver in SDK manager, but it didn't help at all. Installing the fastboot drivers according to the OMAP4boot thread leads me to a no digital signature error too. What has gone wrong?
[LG Optimus L9 P760, P765, P768, P769] rocky922:
I have v20b, L6260_Modem_SIC__01.1230.00 and i was waiting about 3 hours;/

I don't believe!;d My phone is now unlocked and rooted;d I charged my phone to 100% and i waited over 10 hours and i get in to fastboot;d Thanks.
[LG Optimus L9 P760, P765, P768, P769] freshbooy:
after i enter adb reboot oem-unlock , got nothing . the phone just reboots! P768 20A vietnam
[LG Optimus L9 P760, P765, P768, P769] aloy99:
Waiting 3 hours where o.o as in, at which stage of the procedure did you wait 3 hours
[LG Optimus L9 P760, P765, P768, P769] freshbooy:
i entred adb oem-unlock and the phone just reboots!!

P768 Mexican V20A
[LG Optimus L9 P760, P765, P768, P769] aloy99:
Could this mean that we need to flash say the P760 firmware? Perhaps our firmware doesn't allow for fastboot
[LG Optimus L9 P760, P765, P768, P769] freshbooy:
no one knows whats going wrong?

i think if you flash the P760 on P768 phone , U break ur phone 99%
[LG Optimus L9 P760, P765, P768, P769] rocky922:
I waited 3 hours with phone on and simcard inserted but this give me nothnig:rolleyes: I waited then 10 hours and charged phone to 100% and this helped me;)
[LG Optimus L9 P760, P765, P768, P769] Lelus:
Telce Mexico LGP768G V20A kdz isn't unlockable
[LG Optimus L9 P760, P765, P768, P769] nh4Rdz:
what isnt unlockable? firmware or devices?
[LG Optimus L9 P760, P765, P768, P769] cgigate:
LOL!

L9 is not breakable!
[LG Optimus L9 P760, P765, P768, P769] freshbooy:
which roms are unlockable?!

---------- Post added at 03:08 AM ---------- Previous post was at 03:07 AM ----------

with Vietnam rom . i still cant unlock BL!! P768
[LG Optimus L9 P760, P765, P768, P769] gauravgs:
does it (3845#*768#) work on stock, unrooted (JB) phone?
[LG Optimus L9 P760, P765, P768, P769] nh4Rdz:
yes
[LG Optimus L9 P760, P765, P768, P769] gauravgs:
no it doesn't.. I have LG L9 P765 (JB v20a, unrooted stock rom) and the above code gives me "Connection problem or invalid MMI code".
[LG Optimus L9 P760, P765, P768, P769] nh4Rdz:
use 3845#*765#
[LG Optimus L9 P760, P765, P768, P769] gauravgs:
Great, it works now.. Thanks
[LG Optimus L9 P760, P765, P768, P769] sai69:
S/W Upgrade.. Please wait while upgrading...

is this an error? or should I just wait for it to finish?
[LG Optimus L9 P760, P765, P768, P769] mussi96:
PLEASE! PLEASE :crying: cmahendra make tutorial on how did you install those fastboot drivers have literally done everything but still no success

in fastboot mode i get this annoying message stating that usb device not recognized it keeps flashing continously
[LG Optimus L9 P760, P765, P768, P769] Gh0sT.RPG:
+1
[LG Optimus L9 P760, P765, P768, P769] mussi96:
+1???
[LG Optimus L9 P760, P765, P768, P769] Gh0sT.RPG:
LOL :laugh: means even i wan a tutorial from cmahendra about installation of fastboot drivers.
[LG Optimus L9 P760, P765, P768, P769] mussi96:
Oh F. Sorry :p
[LG Optimus L9 P760, P765, P768, P769] mussi96:
Finally!! rooted my phone and flashed cwm recovery.Huge thanks to [MENTION=5078784]Gh0sT.RPG[/MENTION] and [MENTION=4448971]cmahendra[/MENTION] :laugh:
[LG Optimus L9 P760, P765, P768, P769] sai69:
^congrats! :) care to share the info? I really wanted to root my p768 for a looooong time now.
[LG Optimus L9 P760, P765, P768, P769] aloy99:
What did you do differently? :eek:
[LG Optimus L9 P760, P765, P768, P769] mussi96:
When i was in lg fastboot mode i used to get the annoying error of usb not recognized.

Problem: Fastboot drivers not installed follow this thread http://xdaforums.com/showthread.php?t=2119090

Finally after some .i installed it and in lg fastboot mode there was no annoying message (WIN 7 is the best!) and finally using adb shell i flashed

cwm img file and through cwm flashed supersu .VOILA! :victory: you have root .Try it out yourself i am sure after a lot of trial and errors you will get it.If you

are facing problems send me a PM(send it after you have worked your a** off and still you didnt get it LIKE ME :laugh: )
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
Are there anyone here with a P768 and Vietnam V20A that has unlocked the bootloader? Will appreciate some assistance, because using the adb reboot oem-unlock command only restarts my phone:)
[LG Optimus L9 P760, P765, P768, P769] donk165:
I have the same problem as you. As far as I know, all KDZ's for p768 don't allow you to unlock the boot loader. However, we may get a new KDZ in the future with these abilities.

I am going to try flashing lelus's fastboot package once I'm at my PC. I'm not sure if this well help with bootloader unlocking. If it works, I'll make a guide post explaining how to unlock the BL. I don't have high hopes though, I've only had fastboot working once - using a P760 KDZ on my P768.
[LG Optimus L9 P760, P765, P768, P769] sai69:
still wont work on my phone ... hmm I wonder what I've done wrong T_T
[LG Optimus L9 P760, P765, P768, P769] mussi96:
In which step
[LG Optimus L9 P760, P765, P768, P769] sai69:
it doesn't boot on fastboot even if I already installed the omap drivers.
[LG Optimus L9 P760, P765, P768, P769] Lelus:
forget about fastboot/omap drivers untill you actually unlock bootloader
[LG Optimus L9 P760, P765, P768, P769] sai69:
i see.. im so lost right now.. so what IS step 1? :(
[LG Optimus L9 P760, P765, P768, P769] mussi96:
Try flashing Indian v20 and then try to unlock the bootloader. First unlock the boot loader then flash unsigned boot.img using fastboot.

---------- Post added at 11:10 PM ---------- Previous post was at 11:08 PM ----------

Type "adb reboot oem-unlock" then unlock it. Read the steps carefully. :o
[LG Optimus L9 P760, P765, P768, P769] Gh0sT.RPG:
[MENTION=4448971]cmahendra[/MENTION] Can u add few lines in your OP like on which firmware bootloader can be locked? This might prevent some same questions from repeating in the thread and might help out others. I tried unlocking on p765 v20B, v20C & v20D all unsuccessful. I unlocked on v20A Indian in just 20min. So, may be this info might be helpful to others :highfive:
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
To unlock bootloader the suitable rom P760 V20B EUROPE OPEN is already mentioned for P760 and P765 but people don't read, what can we do? But now its more highlighted, with your information also. THANKS.
[LG Optimus L9 P760, P765, P768, P769] Gh0sT.RPG:
No thanks to u, u have done everything not me :) may be u shlould apply for RC am sure u will get it soon :highfive:
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
:highfive::good:

What is RC? I dont drink.... lolz. kidding. I dont need to be one. :) Unnecessarily more responsibilities on head. Some people (like me) work like maniacs when they are set free. :laugh:
[LG Optimus L9 P760, P765, P768, P769] dhruvbatra205:
Mine says 'Lock'

What does this mean? O.o

P.S. When I enter adb oem-unlock, my phone just reboots normally.
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
Your bootloader is still locked. The only way at the moment to unlock the bootloader for the P768 is to flash the P760 V20 kdz. You will temporarily lose camera functionality, but that is fine because after unlocking the bootloader you will reflash your current jb os. And the bootloader will stay unlocked:). When we have custom roms, it will be then possible to keep fastboot on the device
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
hi there i'm getting this problem when installing driver
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
Here is a thread that may help

http://www.picohelp.com/1149/how-to-make-windows-7-drivers-work-on-windows-8-inf-modding.html
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
thanks its installed now :)
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
+1 [MENTION=5233332]riaanvictor[/MENTION] good reference page for all. thanks
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
guys after this cmd "C:Android\>adb reboot oem-unlock" my phone restart but it come back to home screen not in recovery why ??
[LG Optimus L9 P760, P765, P768, P769] Gh0sT.RPG:
I think if u have unlocked ur bootloader already, it will just reboot the device
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
then how am i supposed to install cwm ?
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
I think you can install cwm through the rom manager app but im not sure. I have the P768 and when I used the P760 V20 kdz the adb reboot oem-unlock command always took me to fastboot mode. It doesnt work anymore because I went back to the P768 firmware after unlocking and flashing cwm
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
no i tried it wont work with rom manager

---------- Post added at 05:28 PM ---------- Previous post was at 04:43 PM ----------

ahhh i tried everything but it just restart normally :(:confused:
[LG Optimus L9 P760, P765, P768, P769] fer2503:
it work on 20D balcanic for p760?
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
What variant of the L9 do you have?

I get the feeling you are using a rom that doesn't support fastboot. You should try to repeat the process for unlocking the bootloader with the P760 kdz. If you follow the steps, you will end up in fastboot mode. From there you can flash cwm using the fastboot commands. After that you can flash back to the rom you are currently using. Hope this helps:)
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
well i'm on p765 V20A rooted(with lelus method)

and right now i really wanna install pacman rom :D but ........................................:crying:
[LG Optimus L9 P760, P765, P768, P769] cmahendra:
This is not correct @Gh0sT.RPG

I have unlocked P765 and when I run this command it starts in FastBoot mode, where you can give fastboot commands. It does not just restart the phone. The fastboot mode is shown as image in (STEP 2B).

For P765 and P760, fastboot works perfectly as they are LG open market devices. EVEN THIS COMMAND WORKS PERFECT ON JB FOR THESE MODELS.

There are some other issues with P768 and P769. May be the mobile carrier companies (P768 and P769) have something else in their mind and may have made it difficult to fastboot. :(
[LG Optimus L9 P760, P765, P768, P769] ragnarus:
Can i unlock bootloader on my Lg P769 v20d

Can i unlock bootloader on my Lg P769 v20d with this method or this method is only for lg p760 or p765???
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
ok now what i should do ? i'm on V20A p765. i tried 5 to 8 times but it just normally restart
[LG Optimus L9 P760, P765, P768, P769] Gh0sT.RPG:
Sorry u were right :laugh: but for me it just rebooted device without goin to fastboot, after u mentioned i reinstalled drivers and now am in fastboot after passing adb reboot oem-unlock :highfive: sorry for the wrong info frnds :(

---------- Post added at 01:17 PM ---------- Previous post was at 01:15 PM ----------

May be fastboot drivers have not been installed correctly, try reinstalling drivers. For me, as cmahendra said it took me to fastboot :eek:
[LG Optimus L9 P760, P765, P768, P769] dhruvbatra205:
So i need a custom ROM to access fastboot?
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
Thats what I think, because on my previous lg device I had to use a fastboot kdz to get fastboot and then flash a custom rom to keep fastboot. Hopefully the P768 will be the same:)
[LG Optimus L9 P760, P765, P768, P769] DeceptiPrime:
well i think drivers are installed look at this

open
[LG Optimus L9 P760, P765, P768, P769] dhruvbatra205:
I guess its just because they are trying to boot into fastboot with a p768 firmware :)

---------- Post added at 08:33 PM ---------- Previous post was at 08:31 PM ----------

Is there any way to get the touch recovery provided in this thread from the other recovery which you flash on a locked bl?

I restored a nandroid backup of my P768 V20A after flashing that recovery from fastboot. Now i dont have fastboot because of the 768 firmware and the nandroid restore got me back to the old recovery

Just a little thought, if i replace the recovery in a nandroid backup and restore only the recovery using advanced restore, would it work? I am doubting this just because the backuped recovery is of 10mb and the touch version is just 5mb :)
[LG Optimus L9 P760, P765, P768, P769] r3l4x_pt:
hi. i need some help rooting my l9. ive folowed the guide but its not working for me. after adb reboot oem-unlock i dont get any text on the screen it just stays black but omap4boot detects the phone in fastboot mode.

baseband: L6260_MODEM_SIC_01.1230.00

kernel: 3.0.31

build: JZO54K

ver: p76020b-208-10 its from SFR france

is the rom unlockable?
[LG Optimus L9 P760, P765, P768, P769] riaanvictor:
Thats weird because the P760 V20 kdz is usually able to be unlocked. If you type 3845#*760# in the dialer and check the bootloader status, does it say unlocked? If you can, you can flash the europe open version of the P760 and try the bootloader unlock method. The previous lg devices had that fastboot with the plain black screen
[LG Optimus L9 P760, P765, P768, P769] r3l4x_pt:
It says locked :( I dont understand much of rom dev but maybe my carrier disabled fastboot mode or something. Can i still flash the europe open with locked bootloader?

I forgot to say one thing. On omap4boot when it says to disconect and reconnect when lg logo appears on my lg the logo doesent appear it black screen always but its detected in fastboot by omap4boot