yashsingh1/xdaforums huggingface dataset:
[LG Optimus 4X HD] laufersteppenwolf:
hey guys :)

i just thught, while compiling a rom, i could have a chat with lg about the unlock :D

and that's what i did :D

i've asked about the unlockable versions and why some people get the "permission denied" error.

they couldn't answer me what i've wanted to know, but at least a more ;)

so the officially unlockable versions are: euro-open, germany-open (262-000) and UK-open (234-000).

but that wasn't enough answers for me :D

so i asked what decides to be unlockable or unlocked.

and then they told me that a binary ("binary(4/4)") decides that the phone/bootloader is unlockable.

but then the chat stopped :mad:

i will ask again where this binary is stored and if there's a way to get around it, or even if it can be copy-pasted to other phones.

i will keep you posted as soon as i get an answer :)
[LG Optimus 4X HD] future81:
i think its this 4 in 4000000000 in odm reserved because non- unlockable get 8 in the same place - i got 4000000000 on ICS so c0 c8 means unlocked but 8 instead of 4 give security error
[LG Optimus 4X HD] laufersteppenwolf:
good point :good:

i've got a 4 and i'm unlocked, but i don't inderstand what they mean with "(4/4)"... :confused:
[LG Optimus 4X HD] shpapy:
stuck on please wait while running factory reset.

i got eu version.

so i wait .... ;)
[LG Optimus 4X HD] SimonTS:
Try as per my post the other day :cool:
[LG Optimus 4X HD] Lalarex:
BL issues

Hi guys,

I've been trying to unlock my bootloader for a while now and no luck. I tried the cmd process but that didn't work for me. Its an issue at my end not the process. I'm just dumb.

Anyway, the easy process, is also giving me issues. I flashed AGBRBK V20.A yesterday, I place my phone into USB debugging mode, Install unknown sources. I don't get how to use the fastboot and the adb thingy, again, dumb :) I assume you need to put your phone into recovery mode as that's what I did when I rooted my device ( which worked)

I'm just wondering if there is anything i'm doing wrong. All drivers are up to date

Sorry for the long reply
[LG Optimus 4X HD] @non4:
You don't use recovery mode. For "adb reboot oem-unlock" all you need is USB debugging connected in regular boot, for the terminal method you just need terminal emulator on your phone and grant it root by typing "su". Good luck!

Sent from my rooted P880
[LG Optimus 4X HD] Lalarex:
Issues :(

I assumed terminal emulator is an app. So I checked the play store and it exists. But it mentions Linux command lines. I'm running windows 7. Will it still work?
[LG Optimus 4X HD] SimonTS:
It's an app that you install on your phone, not your PC. What is on your PC makes no difference.
[LG Optimus 4X HD] Lalarex:
Sorry

Okay I've installed the app. Now what do I do? Sorry to bother you. I just really want CWM 10.1 :)
[LG Optimus 4X HD] future81:
goto sys/firmware/fuse/odm_reserved whats value there
[LG Optimus 4X HD] Lalarex:
:(

I'm really sorry. Do you mean type that into the app? I cant find a sys file on my phone using the native file manager....
[LG Optimus 4X HD] SimonTS:
Don't follow the "easy" method. You're on the UK firmware which means you have official unlock available to you.

Follow the guide from page one of this thread and see if that works.

And if it freezes then try this alternative method instead.

That way you will be certain that you are only blowing the 'fuses' that you should be.
[LG Optimus 4X HD] future81:
you should be rooted and the better to use es file explorer
[LG Optimus 4X HD] Lalarex:
I'm sooooo bad at that

I tried it. I typed in that 3a command and it didn't work. So I typed in the 3b command. Also didn't work. Clearly something I am doing is wrong. I just don't know what :)

My phone was on 3 (UK) but I have unlocked it so now other sim cards work on it. If that helps
[LG Optimus 4X HD] @non4:
Hmmm glad I unlocked via the terminal hack if three was blocked :D

Sent from my rooted P880
[LG Optimus 4X HD] Lalarex:
:)

I emailed them and they said it was locked. So I unlocked the sim. Hate carrier restrictions. I hear cyanogen mod is great though so I really want it on my phone. Its just I'm terrible at this stuff. Rooting is where my limitations show. I must be doing something wrong :(
[LG Optimus 4X HD] SimonTS:
It makes no difference - you have the UK firmware, so have official unlock capability.

You would be well advised to have a read of this [HOW-TO] Install & Use ADB tool if you want to start playing with your phone. Although it relates to the 'Nook', it is also a good generic read on what ADB is and how to use it.

Download the ADB + Fastboot + Drivers.zip file.

Extract it and put in in a folder called '/ADB' off your root drive. Then open a command prompt, change to that directory 'cd /adb' and type the command as given with your phone connected and in "LG Software" mode.
[LG Optimus 4X HD] Lalarex:
Again, sorry

Okay, I've downloaded that file, thankyou by the way, This is probably stupid, I tried saving it as /ADB but you cant use / in a folder name. Shall I just save it as ADB? And by root drive I assume you mean main drive which in my case is C:?

Have mercy on my noobishness
[LG Optimus 4X HD] SimonTS:
What you downloaded is a 'zip' file - a compressed folder containing other files. You need to extract the contents of the zip file into a folder called /ADB in your root drive.

If you really don't know how to do that then you would be much better off walking away now and leaving your phone alone. I'm not saying that to be nasty, but you will come across much more difficult things in the future and run a very real risk of screwing your phone up totally.
[LG Optimus 4X HD] Lalarex:
Meh

No its fine. You have my best interests at heart :)

I finally figured out what to do. I extracted it to my root drive, typed in the adb command and It turns out I don't have permission. All that for nothing aye :)
[LG Optimus 4X HD] AltLeonidas:
Worked for me
[LG Optimus 4X HD] Lalarex:
??

Any ideas why I might not have permission? Like I mentioned before I'm using AGBRBK V20A official 234-000. Flashed it a couple of days ago.

Sim is unlocked as ive tested EE sims in it.
[LG Optimus 4X HD] SimonTS:
SIM unlock shouldn't make any difference - we are unlocking the bootloader here, which is totally different.

Please post step by step EXACTLY what you have done please.
[LG Optimus 4X HD] TechnoBraker:
How to unlock ESA-XXX

I am on ESA-XXX (V20A India)..

Can anyone please tell me which method do i use to unlock the bootloader of ESA-XXX? :confused:

I do not want to factory as far as possible.. only as a last resort.. :fingers-crossed:

Please give detailed steps as i'm still pretty much a newbie.
[LG Optimus 4X HD] Erazor84:
Short Info: I unlocked my 232.10 (Hutchison Austria) Mobile with the Terminal - Methode. I encountered several problems with roaming in CM 10.1, so i decided to go back to stock rom. i flashed my optimus 4X hd with the LG Mobile Support Tool - Rescue option and my boot loader unlock is still there!

the hidden menu say, that my bootloader is unlocked ^^ so it is not true, that the unlock is gone after kdz flash / recovery.
[LG Optimus 4X HD] future81:
you can use this http://xdaforums.com/showthread.php?t=2251407 if u didn't blown all fuses already
[LG Optimus 4X HD] Captain Sisko:
You download the file onto the phone? Yes its a n00b question
[LG Optimus 4X HD] laufersteppenwolf:
nah, it's a windoze (a.k.a. windows) batch script ;) extract the folder and run the included .bat file ;)
[LG Optimus 4X HD] omidz:
Sorry for the noob questions...

Sorry, Im a little confused about this, i tried to unlock my device with the unofficial script but i couldn't succeed; apparently the phone fail to boot in the LG's Fastboot and boots the android normally, thus leaving the script "waiting for the device"

another thing is i dont have the 'Bootloader Unlock Check' option in my phones hidden menu as mentioned in the guide; I attached all the phone's hidden menu options to check if its simmilar to yours or not.

lastly, I want to check my firmware version but i do not have 'software information' on the about phone's menu(please check the attached)
[LG Optimus 4X HD] future81:
unlock is for Stock JB not on ICS you have
[LG Optimus 4X HD] HYKwan:
Thx, it worked on hk v20b:laugh:,i finally can flash cm10
[LG Optimus 4X HD] Xtream95:
Error

Adb cant se my device in s/w upgrade

Can someone help me figure out the promlem?
[LG Optimus 4X HD] laufersteppenwolf:
well, that's simply because it's not supposed to ;)

s/w upgrade mode is for flashing only. for adb to work you need a booted (booting) android system.
[LG Optimus 4X HD] Xtream95:
I figured it out :P Now i have unlocked bootloader :D

Btw Thanx for replying :)
[LG Optimus 4X HD] lonewolfm:
Unlocked bootloader on 234

Hi,

I just joined this forum today so you could consider me a 'noob'. But I am not a total noob as I am not new to this rooting, modding, unlocking bootlader stuff, just so you know. :)

Yesterday I unlocked the bootloader on my LG Optimus 4X HD which was using the euro-open V20A that I flashed using kdz because I was bored of waiting for the update to be released OTA. My phone is the UK version and the software version was 234, which a lot of people had trouble unlocking. It worked first time for me, no errors or problems occured. So here's how I did it.

I used Ubuntu 13.04 64 bit :) with the android and fastboot tools installed from PPA. Then I basically followed laufersteppenwolf's insturctions on the first page. I left my phone on for about 2 hours and before that I charged it to 100%. But when it came to unlocking the bootloader the battery was at 75%. I plugged my phone into my computer while Android was still running and had USB debugging enabled. Then I sent the command...

adb reboot oem-unlock

using the terminal. Then my phone restarted and went to the prompt where it asks you if you want to unlock the bootloader. So I chose yes of course and then the data was wiped. Afterwards I went to the LG secret menu once I got past the phone setup to check that the bootloader was unlocked, and the checker said 'Unlock' instead of 'Lock'. Then I was happy that I had successfully done it without bricking my device. :laugh:

So my advice to any of you who are still having trouble, just follow the instructions. Leave your phone on for at least 2 hours and make sure your battery is around 75% or more. Also I suggest using Ubuntu or an Ubuntu-based Linux distribution as you won't have any driver problems, and install the android and fastboot tools by using the WebUpd8 PPA. Just search 'android tools webupd8' into Google and it should be the top result and follow the instructions on the page.

I thank laufersteppenwolf for the awesome instructions that DO work as long as you follow them correctly and use the right commands. My phone is now running CyanogenMod 10.1 RC2
[LG Optimus 4X HD] ~Issac:
plz help i just stuck on the "download mode!!!!"

and it doesn't go to the next line that you shows in the screen???

actually how long does it take????

i hv been waited for 15mins.......

help....
[LG Optimus 4X HD] NscMike:
My 4XHD also stuck on the "Download Mode".

After a few minutes i simply rebooted the phone and the bootloader was unlocked :D
[LG Optimus 4X HD] alekthefirst:
Then you need the correct fastboot drivers
[LG Optimus 4X HD] ~Issac:
I am quite sure that i install the driver ???

Is there any different with the fastboot and usb drivers??? Don't they the same?

I am lack of knowledge of it :confused::confused:

Or could you please give me a link for downloading the fastboot drivers???

Thanks so much:o:o
[LG Optimus 4X HD] xetz:
The new script (the one attached in OP) works for me (I think).

The phone shuts down (does not go to fastboot) after I ran the script but the secret code shows my phone is unlocked.

Next -> try out some ROMs and kernels.
[LG Optimus 4X HD] yellow rabbit:
video?

can somebody make a video tutorial for this? it would really help
[LG Optimus 4X HD] Hursty uk:
thanks

download this attatched BL_unlock file and extract it

execute the BL-unlock.bat

you're bootloader is now unlocked :)

]

done this and worked a treat I have a unlocked bootloader thanks :laugh:
[LG Optimus 4X HD] firedrag:
Workarround for "permission denied"

I retest the bootloader script from laufensteppen.

I was able to findout about the permission problem (odm_reserved needs to grant rw access with chmod), the bootloader gets unlocked but at the moment, in my case, the bootloader is locked again after fastboot reboot. I will update my post after I have finished testing.
[LG Optimus 4X HD] rfec:
Is there a way to relock it somehow?
[LG Optimus 4X HD] SimonTS:
[YOUTUBE]-b_EvoZZpj8[/YOUTUBE]

Have you ever tried searching before asking questions? XDA Rules number 1;-

Especially as I now find that you asked exactly the same question here and our knowledgeable member told you;-
[LG Optimus 4X HD] firedrag:
bootloader meldet unlock und nach reboot lock

Sorry didn't recognize, wrong language.

I testet different ways to unlock the bootloader. The problem in the script is, in my case, that odm_reserved is readonly for su. I can change to full access with chmod, but still can't write into odm_reserved.

[MENTION=3264114]rfec[/MENTION]

For me it also looked like the bootloader was unlocked after I executed the script, fasboot feedback is unlocked: yes but after i reboot (fastboot reboot gets stuck at bootlogo), bootloader is locked again. Seems to be a wrong output from fastboot. I attached the logfile from my try, also showing the permission problem.
[LG Optimus 4X HD] SimonTS:
Only in English please on XDA - use Google Translate if necessary. I can't as I'm mobile at the moment.
[LG Optimus 4X HD] firedrag:
don't continue even if fastboot says locked

Didn't find a solution for the permanent locked bootloader (or at least fastboot tells its locked, many seem to have this "problem"). I don't continue because with the script of laufersteppenwolf i can "unlock" the bootloader temporarly and install new kernels via fastboot (or via CWM). In case of a warranty it should not be a problem do send the phone back because they will see a locked bootloader.
[LG Optimus 4X HD] raph88:
Official procedure worked like a charm under xubuntu 12.04 with a 20c-AME-XXX firmware. Let's now try the new cm10.1 rc.

Thank you all.
[LG Optimus 4X HD] adcg06:
I'm very noob, i'm sorry, but how can I install a custon kernel with fastboot? Were can I find this Kernel?

Thank you
[LG Optimus 4X HD] SimonTS:
Go and read. The first rule of XDA is to search first - this has been covered many times.

If you can't work that out then you should leave your phone alone.
[LG Optimus 4X HD] omidz:
i see the unlock bootloader warning. but when i press the vol up key it prints Download mode goes to fastboot mode and stops (doesn't show any lines after that that are in the tutorial's pics)

when i turn my phone off and go back to android the secret menu shows my bootloader is still locked.
[LG Optimus 4X HD] RuedasLocas:
Your signature shows that you're runing ICS. You should be in Official JB to unlock the bootloader.
[LG Optimus 4X HD] cynosure4sure:
Will this work on LG Optimus G Pro with Snapdragon 600 SoC???

Will this work on LG Optimus G Pro with Snapdragon 600 SoC???
[LG Optimus 4X HD] vladutz2007:
Yes someone is able to unlock our bootloader for the g pro beast?
[LG Optimus 4X HD] jigga027:
This procedure ddnt wrk for me ... So i used unlocked bl that work for all phone ... In the thread
[LG Optimus 4X HD] Adam77Root:
I was rooted with the sideload method. Issued 'adb reboot bootloader' to try it out, it did a factory reset and unlocked the bootloader without asking. Quite easy. :D
[LG Optimus 4X HD] laufersteppenwolf:
hmm, interesting... i know noone being really successful using this command...

what does it output when you enter

adb reboot bootloader
fastboot getvar all

?
[LG Optimus 4X HD] Adam77Root:
The most relevant lines:

version-bootloader: 1.0

version-baseband: 2.0

version: 0.4

secure: yes

unlocked: no

When I enter 'oem-unlock' mode, everything is the same except 'secure: no' and 'unlocked: yes', but the whole unlocking process went in 'bootloader' mode as I wrote in the previous post. The most interesting was that it didn't ask anything. It did a factory reset and rebooted.
[LG Optimus 4X HD] laufersteppenwolf:
hmm, so LG really screwed up fastboot :D

secure: yes

unlocked: no <---- that's exactly what i expected... booting into fastboot grants you no rights, but trying to "unlock again" leads you to the usual fastboot with all needed rights... also fastboot boot boot.img somehow doesn't work...

and it did not ask for anything, as this was not the way LG meant to unlock the BL, so in theory it shouldn't even work :D
[LG Optimus 4X HD] kelly66:
I am getting "error:device not found". I am on P88020b-466-92. Can it be unlocked?

Hi, I restarted my laptop to effect the adb and fastboot driver changes. Then I went to cmd and tried the official unlock method, it did execute the command and screen went blank. I removed the battery and started the system. Still bootloader was locked. Now, I unofficial step of running the BL.bat. Commands got executed and screen went blank again. Again, I removed the battery and started the system. NOW bootloader is UNLOCKED. Hope it stays that way. Was lucky to just try and achieved this. However, it did not wipe any data. Hope this is fine.
[LG Optimus 4X HD] cimston:
i see the unlock bootloader warning. but when i press the vol up key it prints Download mode goes to fastboot mode and stops (doesn't show any lines after that that are in the tutorial's pics)

when i turn my phone off and go back to android the secret menu shows my bootloader is still locked.

When i unplug the USB cable,the next white line of text pops up instantly,but it never gets to show the second line of text where it says "done".

I also tried to run the BL_unlock batch file,but it`s been 10 minutes already and it still says "unlocking".

Does anybody have any suggestion?
[LG Optimus 4X HD] dimi89:
[MENTION=4149706]cimston[/MENTION] what rom are you using ? I unlocked mine (20a Open-Euro) today in ubuntu based distro and everything went fine.I was using official method for unlocking.
[LG Optimus 4X HD] sam 4x:
How

How to do that ? :eek:Can you point towards the steps please ?
[LG Optimus 4X HD] jigga027:
Just dwnld de BL unlock file ... Extract it... Open cmd in that window whiles ur phone is cnectd... Nd run the BL unlock bat
[LG Optimus 4X HD] sam 4x:
Sorry for the questions but to me its not sounding that simple. I just dont want anything to mess up. File is downloaded and extracted, now what mode should i connect the phone in ? And what next ?:angel:
[LG Optimus 4X HD] sam 4x:
Rejoice

Thankyou all the smart minds behind this unlock trick.. the second option worked like a charm. Im very happy. Now its time for cm 10.1. :victory:
[LG Optimus 4X HD] Nafoni:
A quick, noobish question:

My goal is to install the latest Cyanogenmod 10.1 stable version on my Optimus 4X.

Will I need to both unlock the bootloader (as described in this tutorial) and root the phone (as described in this tutorial) before proceeding with installing ClockWorkMod, factory resettings and flashing ROMs etc.? If so, which step should I do first? Or do I only have to do one of these steps?

I've been searching around for hours, and I'm still a little confused on this, so I would really appreciate a quick, clarifying answer :)
[LG Optimus 4X HD] Flying_Bear:
yes and yes.

root first, unlock bl 2nd, install cwm third, flash cm fourth ;)
[LG Optimus 4X HD] Spunkiii:
fastboot flashing

i've managed to complete three steps above, but the last step is giving me some error status 7, (something about assert failed due to device="P880")

further searching lead me to the command 'fastboot flash boot boot.img' --> boot.img from the CM

it didn't work out as it says bootloader locked, while the hidden menu says it unlocked

Please let me know what I can do to flash the CM kernel or flash CM 10.1 ROM

i've already tried the fastboot command on oem-unlock mode..it seems to work but it just gives a boot-loop and doesn't let me install CM
[LG Optimus 4X HD] SimonTS:
"Status 7" is a very common error - search again and focus on the version of CWM required.
[LG Optimus 4X HD] Flying_Bear:
as SimonTS said, you need up-to-date CWM ^^
[LG Optimus 4X HD] AzureV:
Is it possible to RE-LOCK the bootloader and go back to stock firmware after unlocking using this method and flashing custom rom?
[LG Optimus 4X HD] leboreiro:
i want to know WICH KDZ is unlockable ? v20 euroopen? ..

Also where can i download the SDK for my 4x HD ? (windows) or someone can explain to me what do i have to do after i type " C:... "
[LG Optimus 4X HD] arrebite:
I'm sorry i can't find a definitive answer but can the official v20a 234-00 be unlocked?
[LG Optimus 4X HD] @non4:
All can be unlocked one way or another. Yours can be unlocked officially but you have to use UK v20a, if you use European one you get permission denied
[LG Optimus 4X HD] arrebite:
Well when i ordered the phone it came from UK then i updated with LG Suite so i think i have the UK one.

How do know for sure that i have the UK v20a?
[LG Optimus 4X HD] SimonTS:
Search and read please. These sort of questions have been covered so many times. :banghead:
[LG Optimus 4X HD] :
It doesn't matter, I did this on my Optimus 4X HD running Jelly Bean!
[LG Optimus 4X HD] gingerboy92:
i just bought my o4xhd 2 days ago, from what i've read, unlocking the bootloader will void the warranty. i'm fine with that if it's worth the tradeoff(if custom rom/kernel gives much much better battery life etc), but since i can't try it out first before unlocking, i need some opinions if it's worthy of voiding the warranty?
[LG Optimus 4X HD] Cheetah1024:
Why will it wipe the data? :facepalm:

A bit more complicated, but everything stays... http://xdaforums.com/showthread.php?p=40724023
[LG Optimus 4X HD] Flying_Bear:
official method does wipe data. editing the fuse doesn't, but creates some issues with fastboot.
[LG Optimus 4X HD] Cheetah1024:
What issues? Haven't experienced any...
[LG Optimus 4X HD] Flying_Bear:
fastboot reads bootloader as locked eachtime you boot it (even though it's obviously not), you can enter adb reboot oem-unlock and then fastboot will show bootloader unlocked for current session, next time you start it it's gonna show locked again. as far as i know, that is :D
[LG Optimus 4X HD] Cheetah1024:
Oh well, I hardly use fastboot anyways... ;) I rather want to keep my data... :D
[LG Optimus 4X HD] wajahebat:
As from my opinion, during first time i get my hands on this O4X, its battery life is such a bullshyt...

Then i get it rooted, tweaks here and there a bunch, i managed to get more battery life, but then i think why dont try custom kernel?

Then i get it unlocked, flash custom kernel, voila !! Battery is superb
[LG Optimus 4X HD] fvknl:
Phone Reboots

Whenever I run

The phone just reboots, I don't get to unlock it? I'm running V10D

Please help!!!
[LG Optimus 4X HD] profyler:
Read the thread properly, you need to be on V20
[LG Optimus 4X HD] kelly66:
Which custom kernel has improved your battery life? Pl confirm.

Thanks.
[LG Optimus 4X HD] wajahebat:
Iodak Kernel
[LG Optimus 4X HD] hasan4791:
Request

Humble request

saw your post abt official unlocking of LG optimus 4x HD.

I'm having LG optimus G E-975 International version. We are facing very big problem in unlocking the bootloader and most of the times it may lead us to hardbrick or softbrick. Kindly PM me the mail format you sent to LG regarding the unlock procedure as it ll help our development more open. Always credits added to developers.
[LG Optimus 4X HD] Emil Joey:
With my upgraded phone in v20b, I have tried the "official bootloader unlock procedure" days and nights but still fail.

After searching through the internet again, I have tried the following steps and I make it to unlock.

1. load the v20a kdz (leak version)

2. root the phone

3. run the script created by laufersteppenwolf (in 1st post of this thread)

I can then upgrade my phone back to v20b through the LG software.

Hope the above steps help more guys to enjoy our P880. :o