yashsingh1/xdaforums huggingface dataset:
[LG Optimus 4X HD] Flying_Bear:
all except canadian p880g.

for rest, you need jellybean software on it first
[LG Optimus 4X HD] PopKralj:
so this was the official way now we're gonna take a look into the way, that can unlock every bootloader (at least we've heard nothing opposite )

download this attatched BL_unlock file and extract it

execute the BL-unlock.bat

your bootloader is now unlocked

So,should I get first in recovery mod,then go to apply adb and then run bl_unlock bat file?
[LG Optimus 4X HD] Foladko:
I get the unlock permission denied message. What can I do?

Thanks
[LG Optimus 4X HD] popy2006:
See: http://xdaforums.com/showpost.php?p=45602279&postcount=544
[LG Optimus 4X HD] Matt.qmello:
Hi XDA guys!

I'm a brazilian Android admirer.

(Sorry for my English)[emoji28]

I installed the CM 10.1.3 In my P880 v20b, following this tutorial to unlock bootloader.

But, I had a nasty result when running "adb reboot oem-unlock"

My phone reboots after command, but always in battery charging mode... [emoji15] Never reboots in bootloader mode.

So, when I called the number of Hidden Menu (3845#*880#) I saw that the bootloader status is unlocked... [emoji1]

How strange! Isn't it?
[LG Optimus 4X HD] A@m@D:
Hi

This method work on g pro lite d686?
[LG Optimus 4X HD] Matt.qmello:
Hi A@m@D, have you tried it?

(Edited)

The author of this topic said:

So, if you have an "euro-open version", feel free to try!
[LG Optimus 4X HD] Flying_Bear:
he definitely didn't say most LG devices. it WILL most probably NOT work on any other device, unless specifically said
[LG Optimus 4X HD] Matt.qmello:
[emoji28] Sorry...

You are right Flying_Bear...

In that case, do so at your own risk...

But guys, what can go wrong?

I've tried it several times, and nothing go wrong... The only adverse reaction is a simple reboot.
[LG Optimus 4X HD] Flying_Bear:
i don't really know if anything can go wrong, but it isn't smart to get people's hopes up. some people with devices whose bootloader cannot be unlocked yet can come here, read that they might be able to unlock with this method, and fail, so they'll complain here and all that could be avoided just by saying "it will probably not work on your device unless specifically said it works"
[LG Optimus 4X HD] Matt.qmello:
This is true Flying_Bear. I've edited my post, to not bring more trouble! :good:
[LG Optimus 4X HD] A@m@D:
Hi

Thanks for your replay

How to i know my frimware is euro open version ?

فرستاده شده از LG-D686ِ من با Tapatalk
[LG Optimus 4X HD] Richard shearer:
I cannot run adb

Hi.. pls help.. trying to root my lg 4xhd, download the file link , once i click on adb,

It just show a second then go off from screen. I stuck here.. don know what to do.
[LG Optimus 4X HD] paolotheking:
Hi, my device come back from customer service, they chanded the motherboard and now i can't unlock the booloader, i tryed 4 different guides but nothing, i see a red message that says: "Unlock permission denied"".
[LG Optimus 4X HD] dimi89:
Probably LG locked your device for good.
[LG Optimus 4X HD] paolotheking:
Ye maybe :mad:
[LG Optimus 4X HD] paolotheking:
The same for me :/
[LG Optimus 4X HD] Flying_Bear:
lg often blows all your fuses if you send your device to them. yep, they're assholes
[LG Optimus 4X HD] syNo*:
i just wanted to unlock bootloader using the method described here but now my phone is stuck at "DOWNLOAD ODIN!!!" someone else experienced the same issue??
[LG Optimus 4X HD] Exeleration-G:
I have the feeling that I'm missing something.

Could any of you guys help me?

I'm using a LG 4x HD (p880).

I'm running Android 4.1.2, kernel 3.1.10, software version P88020a-EUR-XXX. I flashed this firmware by using the KDZ file "P880 V20A_00.kdz."

I've succesfully rooted my phone using the 'root.bat method' (the one which sideloads Superuser.apk).

I want to unlock this device's bootloader. I've tried a lot of things, but none of them seem to work. I'm using Ubuntu 14.04 and Windows 7.

Things I've tried so far:

Use the adviced `adb reboot oem unlock` method. My device will show the 'Done,,, Now Ready!' message, but after taking out the battery and rebooting, I'm getting 'Lock' at the Bootloader Unlock Check.

Use `adb reboot-bootloader`, then `fastboot oem unlock`. I get the message '(bootloader) Bootloader is unlocked now.'. I then take out the battery and see 'FAILED (status read failed (Protocol error))'. When I do the Bootloader Unlock Check, I get 'Lock'.

Echo a string to `/data/local/tmp/odm_reserved`. This also gave the 'Lock' message.

I've tried everything with sudo ('administrator permissions'), to no avail.

If any of you guys could help me out here, I'd really appreciate it. Thank you.
[LG Optimus 4X HD] skayable:
Are you serious? This forum is for the 4x HD and not for your Samsung Phone...
[LG Optimus 4X HD] Das_Sams:
Well let's do something about branded Phones

When I bought my P880 [MENTION=2075210]369[/MENTION]€ without contract noone told me it's branded. This is simply impertinent.

I've an Idea about how to hack this ****:

In the official unlock manual it's mentioned the Phone needs to be online for several hours.

If found a Tutorial about flashing: (I may not include links here. This makes it a little difficult so repair them please as known on email adresses.)

aitch-tee-tee-pee-colon-doubleslash-trippledouble_u.handy-faq.de/forum/lg_optimus_4x_hd_forum/240098-lg_optimus_4x_hd_firmware_manuell_updaten_flashen.html

For those one who do not understand German: If you add your IMEI to the following link (after the =) you get a XML-File about your phone's configuration:

aitch-tee-tee-pee-colon-doupleslashcsmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=

Well I downloaded a stock ROM .kdz for the branded and for the unbranded version but they are actually the same file.

I belive the some hours waiting thing is because the phone askes LG if it's allowed to unlock or not by sending it's IMEI.

So I propose the following solution:

Setup a wlan with a package sniffer and connection to the real net.

Analyze the queries with branded IMEIs and unbranded ones.

It should be possible to program a server which cheats the device.

Maybe a simple proxy with little modification or configuration will do, or a patched or configured DNS on the Router.

I want my Phone to run Gentoo. For now Gentoo runs in a chroot.

If somewhat makes a progress on that propose let me know please.
[LG Optimus 4X HD] Flying_Bear:
You don't need to be connected to network with fuse editing method afaik. Anyway, I don't think you ever needed to be connected, it was just LGs bull**** reason why their method doesn't work with some devices. Fuse editing works for sure, unless you blew all fuses.
[LG Optimus 4X HD] SumD00d:
Best KK-ROM for P880 in terms of smoothness, stability

I'd post elsewhere but I still don't have the 10 posts together -.-

So what are your opinions which laufersteppenwolf (goo) KK-ROM for P880 you think is best in terms of smoothness and stability?

I've been on Vanir (KK-nightly) for a while and am wondering if e.g. Gummy or LiquidSmooth would be an alternative/improvement.
[LG Optimus 4X HD] derders:
[MENTION=5811087]SumD00d[/MENTION]

go here http://xdaforums.com/general/general and say hello or help to get your 10. post

but to ask in bootloader unlock thread which ROM is better is no good idea :silly:
[LG Optimus 4X HD] dimi89:
Best option (since best rom.kernel threads are forbiden on XDA) is to go to the wanted rom thread and READ and later ask question u want to know about that rom option/usability/battery.In moust cases users after every new build report bugs/improvements (in CM thread after every nightly)
[LG Optimus 4X HD] SuperLamic:
yeah, I've unlocked my phone with it and because we haven't got any update, this would still work (and we won't get any update in future, so this will work forever)
[LG Optimus 4X HD] ryantju:
So now I have adb on the right path and everything.

But when i type the command: adb reboot oem-unlock

It just reboot and does nothing.

do you have any idea?
[LG Optimus 4X HD] cgigate:
It does reboot, that is supposed to do.
[LG Optimus 4X HD] ryantju:
It should give me a menu where i need to press the volume up button to unlock bootloader right?
[LG Optimus 4X HD] alekthefirst:
Yes.

Did you flash v20x first?
[LG Optimus 4X HD] ryantju:
nope, that is the jellybean update right?
[LG Optimus 4X HD] silkenhut:
Thank you for the BL-unlock file. This was the only way I was able to unlock bootloader and flash a custom recovery.

Doing the oem-unlock or the fastboot way didn't work for me. It would say "yes" when I do fastboot getvar all but when I try to flash a custom recovery; it would say that bootloader is still locked.
[LG Optimus 4X HD] fahmidyboy:
It didn't wipe my data?

I tried unlocking the BL but I wasn't seeing the results listed in the tutorial but it appears my bootloader got unlocked during one of my attempts. I know this because when I went into hidden menu and done the BL unlock check it said "unlock". It was on lock the first time I checked.
[LG Optimus 4X HD] ShrekOpher:
unlock for Note 4

So when you say this "works fir everyone" would it work on a Note 4? Or do you mean every LG phone?
[LG Optimus 4X HD] dimi89:
LG 4X HD go to Note 4 thread and ask there.
[LG Optimus 4X HD] Siauka:
What for those 2 hours waiting? Is it important to wait or it doesn't matter if I succeeded on unlocking without waiting 2 hours? Can I have baseband/ril problems if I'm not waiting 2 hours before unlocking?
[LG Optimus 4X HD] LGaljo:
Your unlocking won't be successful. I just doesn't work, probably because network carrier has to be verified to allow unlock or sth like that
[LG Optimus 4X HD] toty250:
hi every one

i wana ask if this metode can worck LG G Pro lite d686 or its just for LG x4 HD

im on android 4.4.2 kitkat v20c

TNX for reply please
[LG Optimus 4X HD] kreatonn:
hi wanna ask :)

do i need to have fastboot in order to use the second method? or just need lg driver and adb?
[LG Optimus 4X HD] chenks76:
i'm having problems getting this to work.

when i do "adb reboot oem-unlock" the device just reboots as normal, it doesn't go to the screen asking to confirm unlocking.

i have an unbranded "sim free" P880 (UK/European version).

when i do 3845#*800# i don't even see an option in the menu to check the bootloader status.

any ideas?
[LG Optimus 4X HD] The-Pierrot:
Thanks a lot. I've tried every method but it didn't work. But i downloaded "BL-unlock_new" it worked well!!!
[LG Optimus 4X HD] meaplawl:
Hey i'm new at this and I have one question about 3rd step, do i define the path to the BL-unlock_new.rar adb or adb i installed on my computer (C:\Users\...\.android )
[LG Optimus 4X HD] Marko055:
If you are not sure what are you doing you should use Lgp880 tool kit.

http://xdaforums.com/showthread.php?t=2230934
[LG Optimus 4X HD] meaplawl:
Thank you :)
[LG Optimus 4X HD] sn8keyz:
Official Bootloader unlock procedure from LG

+1 on this.

I have attempted to unlock the bootloader on my Optimus F60 - LGMS395 from MetroPCS, with no success.

I have tried variants based on this original post, but just doesnt work.

I, then, followed up with LG Support to request the official firmware for this phone as well as a method to unlock the bootloader.

After waiting a couple of days, I received the following reply....

I am now contacting support for MetroPCS. However, I feel that this will be a dead-end road.

Since MetroPCS provides no email support from their website, I will have to call when I am not working...

Next-time, I will do my research, then buy an unlocked device...Lesson Learned.

***Email Start***

Hi! How are you? I hope you are doing fine!

Thank you for contacting LG Electronics, USA!

"....

Regarding your inquiry, we cannot provide you the official firmware as this is installed on your phone in the factory.

For your reference, your phone is manufactured for Metro PCS and is locked by them.

If you want to root or access the bootloader, you need to unlock it from them.

However, it is not recommended as it will void the warranty of your device.

Moreover, only the original carrier can also provide you the instructions on how to unlock the bootloader on the phone. ..."

Again, please accept our deepest apology for any inconvenience it has caused you.

Thank you for contacting LG and have a wonderful day!

Sincerely,

Joberth

LG Customer Service

Toll Free number: 1-800-243-0000

LGEAI | Customer Interactive Center

Monday- Sunday

***Email End***
[LG Optimus 4X HD] Maxr1998:
Hey guys, I want to unlock and twrp the 4X HD from a friend, but sadly, it seems harder than I thought and I can't get it to work. After spending hours on upgrading his device to Jelly Bean, I finally managed to flash the EUROPE OPEN V20B from http://lg-phone-firmware.com/index.php?id_mod=15. Now, the device finally doesn't immediately boot after adb reboot oem-unlock, but it says permission denied.. What should I do?

[MENTION=4716493]laufersteppenwolf[/MENTION]
[LG Optimus 4X HD] MattWo:
LG P880 Version C20 262-000 bootloader unlock

It took me several hours to find a working bootloader unlock procedure for

LG P880 Version C20 262-000

adb shell
shell@android:/ $ su
shell@android:/ # echo 40000000c8 > /sys/firmware/fuse/odm_reserved
shell@android:/ # cat /sys/firmware/fuse/odm_reserved
0x00000000000000000000000000000000000000000000000000000040000000c8
shell@android:/ # reboot

after reboot hidden menu (3845#*880#) shows unlocked but

fastboot getvar all

...

(bootloader) unlocked: no

...

I rebooted with

adb reboot oem-unlock

fastboot getvar all then finally showed

...

"(bootloader) unlocked: yes"

...

Thanks to all contributors!
[LG Optimus 4X HD] Awesome-one:
LG L90 Stuck in bootloader

I've never done any operations on this device, never unlocked the bootloader, never rooted never enabled usb debugging and suddenly my phone wont start. All it does it turn on and its stuck on the LG logo screen.. Please HELP!!!
[LG Optimus 4X HD] AlA777:
same here.. no root, no bootloader unlock, what more?! Buttons HOME - BACK - MENU no working anymore, so i just get idea.. i get a hammer and smash that crap! :D
[LG Optimus 4X HD] CollisionFactor:
Will this method work for the VS950 running 4.1.2?

Sent from my rooted VS950
[LG Optimus 4X HD] Smart sam:
How match time take to bootload unlock
[LG Optimus 4X HD] DusanMilovanovic:
help

what is LG Software Mode?:confused: Is that Download mode or they are different?
[LG Optimus 4X HD] vidra:
What do you mean with unlockable firmware?
[LG Optimus 4X HD] trotty:
hi, i tried the .bat, it starts and stops on "daemon started succesfully". Blinking cursor and notrhing.

If i close and restart bl_unlock it blocks at "unlocking now".

Any advice?
[LG Optimus 4X HD] CollisionFactor:
Has anyone tried this with the H631?
[LG Optimus 4X HD] Power user:
Hasn't worked for me yet but getting closer!! BIG THANKS!! I have LG-H831 if u have any other tricks lol
[LG Optimus 4X HD] xanscorp:
It's always lovely when someone assumes something will work for everyone without checking, isn't it? "Official bootloader unlock procedure from LG AND the one that works for everyone ;)" and yet how many are saying it doesn't work....guess it doesn't work for everyone.
[LG Optimus 4X HD] WingedLion:
Thanks,it worked.
[LG Optimus 4X HD] aytukabozs:
Neverending long hours of trying, and now i finally reach above point. it said UNLOCK

But when i try to flash a recovery, terminal said;

FAILED (remote: Bootloader is locked.)

Why ? :'(
[LG Optimus 4X HD] ze7zez:
This action does not take several hours.

Consider why are you took so long.

Are you the first owner?

You can try to upload again V20C ROM and try to unlock again.
[LG Optimus 4X HD] aytukabozs:
Not the action itself was that takes so long. But the preparations. (And failed attempts.)

I try several times, without simcard (i know, i know user error :) )

then with card, but lower (~80%) battery charge,

then a several times with 100% charge, and after 30, 45, 60, 75 minutes on the mobile network,

and then somewhere after 90 mins on the net it happened.

I'm not the owner, the friend of mine who owns the phone is the 2nd keeper, so we don't know nothing about the phones earlier life.

On it there was a stock 4.0 what was maybe the factory rom. Yesterday - before these attemts- i flash a 4.1 rom, from THIS post.
[LG Optimus 4X HD] oF2pks:
Keep cool , you land on the right post; just clear "natural" and specific way to unlock 4X HD (=p880):

0) Download Official LG PC SUITE and check your PC-WIN<-usb->p880

1) Remember that ICS(=4.0=v10) is a locked firmware (and never ever re-flash it)

2) Upgrade to JB(=4.1=v20) with LG PC Suite to get the right baseband (automatic designation paired with your ril=>letter for V20_?) + an locked unlockable bootloader to go (Thx to LG)

3) Verify that your p880 is working : power off + reboot + LG PC Suite/recognition...

4) Read http://xdaforums.com/showthread.php?t=2251407 and understand why never ever re-lock the bootloader ...

5/6/7) Follow 1st post and unlock your official JB bootloader

6) Wait at <1 day for p880 to effectively proceed the unlock_action, and download latest Official rom for your phone : cm11

7) Choose a p880's recovery and download it on your PCwin : Twrp versus Cwm. Reboot your phone once, after 1/2day check that the bootloader is unlocked

[if not go to 5/6/7)...].

8) Flash/fastboot your recovery and reboot JB (to check your baseband).

9) Proceed a full nandroid/recovery backup of your JB

10)

Flash cm11 to check that your baseband meets your V20_? in Parameter/AboutPhone

11) Give >4/8 thanks to @ laufersteppenwolf, and enjoy a while the last Official p880's rom

12) Try aosp5 & cm12.1

13) Moving to aosp6/7 and cm13 needs "recommended" more PC-WIN' flash: V20

C

.kdz_

2014

+

latest

p880' CWM...

BTW : there's a new LG tool named LGBridge, it should be nice (to others ) to report if p880's V20_? upgrade (from v10) is detected. (Otherwise official slow LG PC Suite is most reliable way...)
[LG Optimus 4X HD] Leviathan555:
It works for H810?

I have got this:

bootloader unlock for P880...

whatever you do, do NOT remove the USB cable!!!

idea by Derjan23 + the whole xda community

script by laufersteppenwolf

......................................................

to start, please...

Presione una tecla para continuar . . .

unlocking now...

* daemon not running. starting it now on port 5037 *

* daemon started successfully *

/system/bin/sh: su: not found

/system/bin/sh: su: not found

/system/bin/sh: su: not found

/system/bin/sh: su: not found

bootloader is unfused now!

for final unlock with command "adb reboot oem-unlock"

please...

Presione una tecla para continuar . . .

rebooting into fastboot...

wait...

you see " * WELCOME to LG Fastboot Mode :) " ??

great!! now you can check ulock status:

please...

Presione una tecla para continuar . . .

< waiting for device >

I don't know what does it all mean, and what am I suposed to do after that :( (I'm noob)
[LG Optimus 4X HD] Poomps:
Tried your method it doesnt work.

I tried that method, opened the command prompt typed in " adb reboot bootloader" --->> All that did was reboot the phone into normal mode.

I then proceeded to type in "fastboot oem unlock" and then it just hangs for eternity with the line "waiting for device":

Quote:

C:\Users\Rehan Loy\Desktop\platform-tools-latest-windows\platform-tools>adb rebo

ot boot loader

C:\Users\Rehan Loy\Desktop\platform-tools-latest-windows\platform-tools>adb rebo

ot recovery

C:\Users\Rehan Loy\Desktop\platform-tools-latest-windows\platform-tools>adb devi

ces

List of devices attached

015d2856b4181610 device

C:\Users\Rehan Loy\Desktop\platform-tools-latest-windows\platform-tools>fastboot

oem unlock

'fastbootoem' is not recognized as an internal or external command,

operable program or batch file.

C:\Users\Rehan Loy\Desktop\platform-tools-latest-windows\platform-tools>fastboot

oem unlock

< waiting for any device >

As you can tell it does detect the phone.

I am currently running Android 4.03.

What should I do?
[LG Optimus 4X HD] oF2pks:
You need to upgrade to JellyBean first

https://xdaforums.com/optimus-4x-hd/general/lg-p880-firmware-flash-upgrade-t2919195

https://androidfilehost.com/?fid=529152257862681163
[LG Optimus 4X HD] cupidstunt:
I have the same weird problem. My phone is never recognised in S/W upgrade mode unless I:

1. remove the battery and attach the USB + Vol down (screen always goes white and nothing happens)

2. disconnect the USB & reinsert the battery.

3. insert the USB cable with vol down - and this time it recognises it.
[LG Optimus 4X HD] thediksta:
AGBRBK 234-000 unlocked at last

YES worked first time on AGBRBK 234-000 , now we are rocking
[LG Optimus 4X HD] cupidstunt:
You pulling my leg?

Can you give me a step-by step as to what you did as I've been trying to unlock the same version phone for days with nothing but the security error.

Cheers!
[LG Optimus 4X HD] thediksta:
FOLLOW these instructions to the letter, and dont miss anything out. Also you will notice in the following ADB download that after you extracted adb zip there are 5 steps(bat.exe). run them 1 by 1 and the 5th step is the "adb fastboot oem unlock" and if step 5 does not work for you(didnt for me) then type "adb reboot oem-unlock",,,,,DO NOT type "fastboot oem unlock" it will not work, it must be done from adb(THIS ADB DOWNLOAD ONLY) even if u have got adb and fastboot on your pc, this is the only one that does it correctly

WILL WORK FOR EVERY LG X4 HD PHONE MADE, AS LONG AS YOU HAVE OFFICIAL V20A, ,,,NO ONE WILL BE LEFT OUT

(if it dont work for you then dont give up, you will need to read and read and read again, leaving phone on for 2 hours and 100% batt is key,anything less wont work) ENJOY

Originally Posted by WillySonicteam

First install the fastboot:

http://www12.zippyshare.com/v/5786485/file.html

and copy the adb folder in a directory:

http://www12.zippyshare.com/v/90436494/file.html

in the adb folder open the cmd.exe

tutorial by laufersteppenwolf

1. Turn on the phone with SIM card, and wait for connection to the real network.

2. Wait for couple of hours.

3. Connect your handset to local PC with USB cable.

4. Enter "adb reboot oem-unlock" in DOS command window.

5. Reboot handset and you can see the bootloader unlock guide on your phone.

6-1. If you press volume up key, handset is bootloader unlock status.

You can download custom image using fastboot command.

6-2 If you press power on key, user doesnot accept unlock bootlaoder and handset normally power on.

7. you see this image in your phone

http://xdaforums.com/atta...1&d=1365201659

Later, push the power button a seconds,the phone restarts.
[LG Optimus 4X HD] laufersteppenwolf:
like i've said a couple of times before: this is not the right way, LG made the BL unlockable.

the right command is "adb reboot oem-unlock" and nothing else. try it with this one. ít didn't work for me with "fastboot oem unlock", but "adb reboot oem-unlock" worked fine.

yeah, exactly.
[LG Optimus 4X HD] ronhoover88:
So, Did LG respond to your other mails? What about the release of source code?
[LG Optimus 4X HD] mastershefis:
I wonder why I have to wait for couple of hours. It's true that after 4 or 6 hours appeared window with thanking about the purchase of the product LG and also with checking the agreement to the Terms. It as looks as the phone have to contact LG servers for registration of IMEI or something. It will see if this window if this window appears again. :eek:
[LG Optimus 4X HD] erictune:
142 undeppi

what about the 262 version? any chance?
[LG Optimus 4X HD] laufersteppenwolf:
not yet. but LG gave me these steps on how to unlock the bootloader. i know nothing yet about source code, still waiting for it...

i guess that there is a process in the background that checks somehow if the phone is unlockable, but starts only some hours later or when the mobile data/access point is used.
[LG Optimus 4X HD] laufersteppenwolf:
any chance of using the search? ;)
[LG Optimus 4X HD] erictune:
i just found like a million different answers ...