yashsingh1/xdaforums huggingface dataset:
[LG Optimus 4X HD] rhapsodize4452:
kdz update tool - While connecting usb if you are getting coloured screens and if "Phone Not Found" occurs

I guess its because of 3 things

1. USB drivers have gone corrupt. Reinstall them. (I did not disable modem)

2. If your phones heated up.. I found out that after hours of bootloader check, s/w update trials, my phone was pretty hot. Having USB connected without the battery might cause the device to become unresponsive. In my case I proceeded to kdz update with the battery installed and it worked.

Now after updating i did a factory reset and now I have an unlocked bootloader. It happened after following the unofficial method with needoos fastboot drivers. But the process never complted and I didnot select the option to lock or unlock. Now I will try to root and restore my backup :)
[LG Optimus 4X HD] mastershefis:
Finally UNLOCKED? 230-01

Nope, after booting nothing happened and phone still say Lock :eek:
[LG Optimus 4X HD] Ybour:
BL_unlock worked for my 4x (V20b)

I had a 4X with stock V20b. The standard procedure did not work for me. My bootloader version was also "unknown". With "abd reboot oem-unlock" my phone rebooted, I was shown the option to "press volume up key to unlock" but it got stuck at that point. On the contrary BL_unlock worked and it was very simple. Stiil my device has an "unknown bootloader" but I now use CWM and CM 10.2!!
[LG Optimus 4X HD] momo95:
BL-unlock is the most easy one. Remember to tick debug mode.
[LG Optimus 4X HD] laufersteppenwolf:
Just use the 2nd way (the script) and you should be fine ;)

Also, please never quote the entire OP ;)
[LG Optimus 4X HD] JoinTheRealms:
lol can you modify peoples post? if so where do I sign up? :)
[LG Optimus 4X HD] laufersteppenwolf:
Yes I can :D :D :D

All Moderators can actually, in order to be able to moderate ;) :D

Signing up?! being a Mod isn't just about having the ability to do fun stuff, it needs you to work, and in order to work you need to have some abilities/permissions other users don't ;) :D
[LG Optimus 4X HD] fbinimelis:
Hi, I did's succeeded even with the second method. As far as I can understand fastboot is not being able to make the oem unlock command.

after adb reboot the process stays eternally in < waiting for device > status. The phone boots normally with its normal (and full of bloatware) stock rom

I have v10a from AMX build for Claro Chile (still with android 4.0.4:( )

please help i've tried (i believe) every method available and none worked
[LG Optimus 4X HD] JalmiNyondong1933:
Excuse me, are you trying to unlock LG P880 with v10a ICS firmware?

Because this method is meant for v20x JB firmware. Therefore, you need to upgrade to JB first in order to unlock bootloader.

You were just one "adb reboot-bootloader" away for hard bricking you phone.

Only Chuck Norris can judge me
[LG Optimus 4X HD] fbinimelis:
I am really noob at this. you are tellimg me that i have to upgrade to upgrade to 4,1 first and then try this method? because on chile we are not going to receive that update officially.

my device is already rooted and i downloaded adb and fastboot. i ve triedseveral methods to update to any rom (stock or custom) but it always end with the red error message and after a while i can restart with my stock ics

thanks for any guide
[LG Optimus 4X HD] JalmiNyondong1933:
OP says: an unlockable firmware. It means JB v20x firmware.

Yes, if you are still on ICS. if JB update is not officialy supported in your country, then you can flash v20x KDZ available in this forum (euro open version is recommended, although Im not sure if your language is supported). After you have succesfully updated your phone to JB 4.1.2 then you may proceed to unlock bootloader procedure.. remember that unlock bootloader is only possible on JB firmware.
[LG Optimus 4X HD] fenzo3:
So I got this...v20b euro open

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

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...

Press any key to continue . . .

unlocking now...

/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...

Press any key to continue . . .

<At this part I knew I couldn't unlock B/L due to Unlock permission denied so I closed it>

Terminal emulator methods don't work either...
[LG Optimus 4X HD] Flying_Bear:
you aren't even rooted...
[LG Optimus 4X HD] fenzo3:
LOL so sorry frgt to root after flashing v20b :D
[LG Optimus 4X HD] PenguinStyle:
I did the method but when the text should appear on the phone`s screen that didn`t happend. I pressed vol up and then on button then plug out the usb booted the phone and hidden menu says unlock is it right?
[LG Optimus 4X HD] norelec:
lg l7 II

Will this work for lg l7 II?
[LG Optimus 4X HD] creativeusernamea:
Hey, I'm wanting to install Cyanogenmod on my 4X HD so I need to unlock the bootloader, but I wanted to check a few things before going through with this:

1. Your original post doesn't mention anything about having a rooted device, which suprised me. Do I really not need to root my device or did you not put that because it's so blindingly obvious? ;)

2. Looking through the comments some people are having issues as they don't have the right software version - I'm running Android 4.2.1 software version P88020a-234-000 so am I right in assuming that this is version 20A, so should work with the first method in the original post?

That's pretty much it, if someone could help me that would be really good. Also I've never modified a phone to this extent, so please be gentle on me ;)
[LG Optimus 4X HD] P.R.I.S.M:
Thanks:victory:
[LG Optimus 4X HD] bolehan:
Lets help each other out as we're both trying to achieve the same thing now

Yes I can confirm this is needed. If you open the batch file there are adb commands that require "su".

I am on ICS v10e. When the script got to "adb reboot oem-unlock", my phone just booted normally. So I guess this method does not work on ICS firmware? What do you guys recommend that I do:

1) Use LG PC Update tool and let it upgrade the phone to JB (my phone is HK version), or

2) Should I use this method (http://xdaforums.com/showthread.php?t=2179126) and flash official Euro firmware (LGP880AT-00-V20a-EUR-XXX-MAR-04-2013) so I can use the official bootloader unlocking method?
[LG Optimus 4X HD] SimonTS:
Why is it so difficult for people to read and understand the steps?

You need a v20x software to be able to unlock the bootloader!

Please guys, learn to search and read or you will end up doing something really stupid because you don't understand what you are doing.
[LG Optimus 4X HD] bolehan:
Because V20x wasn't listed as a pre requisite in original post.

so mmm.. does any V20 works or must it be euro open?
[LG Optimus 4X HD] SimonTS:
From the OP;-

It is discussed in many other threads that v20x is required. It doesn't state it in this OP as it was written as a direct result of other threads - but surely you have the intelligence to search and read EVERYTHING you can find before risking your nice, shiny, expensive phone?

Go and search, read and make sure you understand before doing anything else.
[LG Optimus 4X HD] paul-ac:
It worked for me!! I was on official 20b 262 000. Thank you very much!!!! I'm now on 20d with G2 futures! :good:
[LG Optimus 4X HD] geoka7:
Happy new year to everyone! I have this phone with LGΡ880AT-00-V20b-232-10. I tried about 3 times the upper way to unlock the bootloader but nothing happen.:crying:

Did someone help me?
[LG Optimus 4X HD] ROCCOGAMEZZz:
,

iam doing it right now but it is taking 20 min already so is that normal or is is stuck ?
[LG Optimus 4X HD] brunek:
On what step did you got stuck? If you are stuck on "Running factory reset etc.." just take out your battery, leave it out for a couple of seconds and then put it back in and power on...
[LG Optimus 4X HD] Eli Kim:
LG P715 unlock

Im a noob n I just joined a while ago. Can this procedure work on lg l7 p715? If not is there a way to unlock the bootloader? :confused:

P.S. I have a rooted LG-P715 running stock rom with cwm recovery.
[LG Optimus 4X HD] brunek:
How did you flash cwm if you didnt open the bootloader?

This methode is for LG 4X running JB..

posl'o ja to s mob'tela
[LG Optimus 4X HD] Eli Kim:
I used this method. Works pretty well except that the menus are inverted...

---------- Post added at 01:35 PM ---------- Previous post was at 01:29 PM ----------

Im trying to run custom rom bt it's not going thru due to a locked bootloader so if u could refer me to any links that could help.. Your assistance will be highly appreciated :)
[LG Optimus 4X HD] mbokan192:
I hawe read the first post, and I don`t compleatly understand. Is the same procedure and for the v20b
[LG Optimus 4X HD] geronphillips:
unlockable firmware?

Does this require custom firmware? mine is still stock lg, rooted.

i thought doing this was required first before installing any custom firmware.
[LG Optimus 4X HD] balloon27:
You're right, you need an unlocked bootloader prior to be able to flash custom everything. So actually stock is 'needed'. Since you're on stock and already rooted, you're all set.
[LG Optimus 4X HD] zhjackss:
for p895

well, i compiled a CWM recovery for lg optimus vu which is p895, since the p880 and p895 have the same processor and similar structures, do you is this method work on p895. Thanks.
[LG Optimus 4X HD] SimonTS:
We already have CWM Recovery for our device (more than one, as well as TWRP) .. Why would you need to compile it?
[LG Optimus 4X HD] Flying_Bear:
he compiled it for optimus vu ^^

i think it might work, as i recall the devices are almost teh same. did it get jellybean update too? if it's stuck on ics, then it won't work for sure, but if it's got jb, it might work
[LG Optimus 4X HD] SimonTS:
I read that, but I meant why would he need to worry about compiling it for the P880, and why would he want to even risk trying it on our device when we have a fully working CWM already.
[LG Optimus 4X HD] Flying_Bear:
He wasnt gonna flash it on p880,he wanted to try on optimus vu, and asked if this method for bootloader unlocking would work on it
[LG Optimus 4X HD] SimonTS:
Ah, that would make more sense :silly:
[LG Optimus 4X HD] zhjackss:
well thx pals for the answers and concerns lol. unfortunatelly it aint get any jb update even it aint get any update. theres no custom roms, kernels and recoveries so i began to compile on my own. I agree that the procedure may work on vu but i need some guts to do so. I aldready bricked the phone with another recovery (was working fine except that the everything on screen was bluish warranty sent a new mobile) Thanks.
[LG Optimus 4X HD] Flying_Bear:
Like i said, it wont work on ics 100% unfortunately :(
[LG Optimus 4X HD] Adam77Root:
You can't be sure about that. I checked the source and it might be possible. Even asked in VU thread, but activity is very low there.

Sent from my OmniROM-powered LG Optimus 4X HD
[LG Optimus 4X HD] Flying_Bear:
hmm, if the chip is same as ours (and it is afaik), and we couldn't unlock on ics, i think it's safe to say vu users won't be able to unlock on ics too.

but you know better, ofcourse, you're the dev ^^ :good:

in case you brick anything zhjackss, i think you should be able to reflash kdz to fix any issues that apprear. good luck, it's a shame lg's update policy screwed over vu & p880g users.
[LG Optimus 4X HD] zhjackss:
unfortunatelly i got this email.
[LG Optimus 4X HD] hubsabubs:
LG Optimus F6

Will this process work on the Optimus F6?
[LG Optimus 4X HD] dimi89:
Try and let us know.
[LG Optimus 4X HD] godkillerz223:
Nope, no go on the f6 but was worth a try. Thx
[LG Optimus 4X HD] firedrag:
Impossible to unlock bootloader again after warranty service

Lg p880 was unlocked after i changed a few lines in Wolfersteppens BL_unlock Script. (chmod 777 to odm_reserved and then write new code)

I was able to flash cwm recovery and custom roms.

After I sent it back to service because of a hardware failure I reset it to v20b original rom. Got it back and now I can't unlock the bootloader anymore.

I tried flashing again v20a Euro version with this tutorial:

http://www.handy-faq.de/forum/lg_op...s_4x_hd_firmware_manuell_updaten_flashen.html

and this rom:

http://xdaforums.com/showthread.php?p=39666418

no luck.

Secret menu tells

SW version info: p88020a-262-000

factory version: lgp880at-00-v20a-262-000-MAR-04-2013

So now i seem to be on austrian version instead of euro.

At the unlock process now this line of the script won't work, even when i chmod odm_reserved to 777:

echo /data/local/tmp/odm_reserved > /sys/firmware/fuse/odm_reserved

If cat odm_reserved i still see 0x000000000000000000000000000000000000fdffffffcafffffffffffefeffed not 0x00000000000000000000000000000000000000000000000 000000040000000c8,

Did anybody have similiar expierences? Does somebody now a solution/workarround for this problem (flashing a differnt original rom,...)?
[LG Optimus 4X HD] SimonTS:
I suspect that LG simply re-locked the bootloader by blowing all the fuses, thus preventing you from unlocking it again. This has been discussed many times on here, but I'm mobile right now so can't search for you.
[LG Optimus 4X HD] firedrag:
Hi SimonTS!

Thx for your quick reply.

I rechecked it now with the following tool:

http://xdaforums.com/showthread.php?t=2263627

the app confirms your conclusion that all the fuses are blown.

I still hope that somebody figures out a workarround for blown fuses.

br

Fire
[LG Optimus 4X HD] Adam77Root:
Unfortunately no workaround exists yet. Signature check is done in bootloader which cannot be cracked (well, it can be, but it's risky).

Sent from my OmniROM-powered LG Optimus 4X HD
[LG Optimus 4X HD] sv2hqx:
stuck on download mode

Hi this is my first time on lg phone and thread

Tried to unlock boot loader but stuck on waiting gor decive to unlock.... etc

Tried everything

Drivers lg's and similar

Lg suport tool

Fast boot and adb drivers

Skd installed twice

Second pc

Running win 7 (home+pro)

P880 rootet

V 20b

Any ideas
[LG Optimus 4X HD] dedi.stwn:
I try this metodhe but it dont working on my device lg g pro lite d686.after write "adb reboot oem-unlock" its always reboot normally n i cant see fastboot mode on my device?how to fix it?
[LG Optimus 4X HD] SimonTS:
As this method is for the P880 (LG Optimus 4X HD), it is no real surprise that it doesn't work on your device which is totally different :rolleyes:
[LG Optimus 4X HD] Camawn:
No luck for Canadians eh? Do you guys think we'll be able to unlock our bootloader any time soon?
[LG Optimus 4X HD] Flying_Bear:
No
[LG Optimus 4X HD] smithy31698:
Had stock v20b euro open

rooted today installed cwm recovery

Now I'm trying to unlock the bootloader.. I get past the disclaimer and it says " Download mode" but it won't go past that. I have all the LG drivers and fastboot/adb. I still get the pop up that windows is searching for device drivers. What drivers? When I unplug at that screen it moves on to factory reset text, but won't go past that. On reboot, nothing's changed. Help?
[LG Optimus 4X HD] SimonTS:
As per the signature of [MENTION=3506654]Flying_Bear[/MENTION] in the post immediately above yours;-

You installed CWM before unlocking the bootloader?
[LG Optimus 4X HD] smithy31698:
Yes indeed.. I did get the boot loader unlocked last night though using a different method. Thanks though
[LG Optimus 4X HD] sarnz:
I tried the one that works for every1.i am using 4x hd indian version.now when the program say it will show welcome to lg bootloader in my phone it asks whether your sure abt unlocking bootloader.i press volume up for yes nd it shows download mode in red below .after that the script just keeps on showing waiting for device nd nothing more happens..im on jellybean.what should i do?
[LG Optimus 4X HD] Sachazati:
I tried but after reboot there was a Sign that i dont get access from LG.Also problem in Hidden Menu ,i tried to watch and Bootloader: Should be implemented.

I found an unlock.apk and this have done the job perfectly

P880 SlimKat
[LG Optimus 4X HD] SumD00d:
adb reboot bootloader --> any harm?

Before coming here I read some general CWM howto and thus ended up trying "adb reboot bootloader" first. Using "adb reboot oem-unlock" afterwards never got me to the expected screen where I am asked if want to unlock.

However, as others have reported, BL has actually been unlocked and the device reset without any questions which is great most ways :)

Now all I am wondering is if there is any disadvantage in unlocking the unofficial way?!
[LG Optimus 4X HD] Adam77Root:
Yep, I encountered the same. This method is exactly the same as the official method that asks you if you really want to unlock.

I don't know about any disadvantages related to unofficial way. It's even better, because it doesn't wipe your data.
[LG Optimus 4X HD] stevvie:
~I installed CWM before trying to unlock my boot loader, is there a way to unlock my bootloader as it just sits there at factory reset wiping /data part and does not continue. I'm running p88020b-hkg-xxx if that helps
[LG Optimus 4X HD] SimonTS:
Flash a KDZ to get back to stock and then follow the instructions properly.
[LG Optimus 4X HD] santimaster2000:
Noob question, this should work on any LG Phone as long as they are on the same firmware (4.1.2) ? I'm going to buy an LG Optimus F3Q and been able to unlock the BL would be great :D
[LG Optimus 4X HD] Adam77Root:
No.
[LG Optimus 4X HD] arunon2013:
no one can solve this prob ?

i hope no genius in this noob LG community .. no one knows how to unlock lg p715 2 dual phone lol family .! waste developers . i was really disappointed ..
[LG Optimus 4X HD] Adam77Root:
So why do you send me a PM asking "plz sir help unlock the bootloader"? (Of course it's already deleted so can't quote precisely.)

Sent from my OmniROM-powered LG Optimus 4X HD
[LG Optimus 4X HD] arunon2013:
i dont know english fluently . could u help me adam .. i have lg p710 kitkat mod .. but .. i flashed it ,, no gsm signal came .. could u fix it for me
[LG Optimus 4X HD] abhi08638:
http://youtu.be/JmvCpR45LKA

don't forget to hit thanks!
[LG Optimus 4X HD] SimonTS:
This forum is for the P880, which is totally different from your device ;)
[LG Optimus 4X HD] xperia u20i:
hi, sorry if my question is silly, but i'm little confused. When i dial 3845#*880# and scroll to bootloader unlock check,then select bootloader unlock check and if said unlock,that mean that my bootloader is unlocked, right? firmware is v20b... I never unlocked it, i just want to start with rooting but i first go to check that, then i see that my bootloader is possibly unlocked...i'm 2nd owner and i don't know what first does with phone...thanks
[LG Optimus 4X HD] Devizen:
Yes, that means that your bootloader is unlocked.

I've just flashed Vanir 4.4.2 Rom after rooting and unlocking bootloader using this method.

The first method doesn't work for my LG Optimus 4X HD V20A (Singapore).

BL-unlock_new.rar worked. Thanks.
[LG Optimus 4X HD] Soviet Bacon:
Vol + button doesn't do anything

When trying to unlock my euro-open lg 4x hd's bootloader i get to the point where the device is in fast boot saying Now ready at the bottom having followed the official steps and using the bl-unlock bat and when i press vol up nothing happens i don't know what's going on as no else seems to be having this issue.
[LG Optimus 4X HD] Fladder72:
Try "reboot oem-unlock" on shell or "adb reboot oem-unlock" with adb-interface to get in LG fastbootmode... ;) It's all written in this thread...
[LG Optimus 4X HD] romulocarlos:
My phone is a L5II (E455, dual chip).

When I dial 3845#*880# nothing happens... And the command "adb reboot oem-unlock" just reboots the phone. Don't show me the bootloader status.

Another way to do this?
[LG Optimus 4X HD] Flying_Bear:
this method only works for optimus 4x
[LG Optimus 4X HD] Soviet Bacon:
I have done this many times before i get into fastboot on my phone press vol up and still nothing happens could it be a driver issue?
[LG Optimus 4X HD] Fladder72:
There is no need for pressing volume up...

http://xdaforums.com/showpost.php?p=40011764&postcount=1

http://xdaforums.com/showpost.php?p=41862721&postcount=1
[LG Optimus 4X HD] Soviet Bacon:
Yes there is, step 4 second line says press volume up to unlock. I get the same screen as the picture in step 4 but then when I press volume up nothing happens and I cant go to step 5. I cant push any commands to my device while it's in fasboot mode either I cant even do fastboot reboot
[LG Optimus 4X HD] Fladder72:
Have you tried the appended rar-file? Official unlocking didn't work on my device. I've unlocked my P880 by editing the fuse "/sys/firmware/fuse/odm_reserved":

adb shell "su -c 'cat /sys/firmware/fuse/odm_reserved > /data/local/tmp/odm_reserved'"
adb shell "su -c 'echo 0x00000000000000000000000000000000000000000000000 000000040000000c8 > /data/local/tmp/odm_reserved'"
adb shell "su -c 'echo /data/local/tmp/odm_reserved > /sys/firmware/fuse/odm_reserved'"
adb shell "su -c 'rm /data/local/tmp/odm_reserved'"

The Batch file in the archive could do this for you ;)
[LG Optimus 4X HD] Hiderisha:
Please Kindly Help Me in this thread here.

Link Forum XDA Developer

I was trying the step on the first page too, yet it still not accessible. :(

After typing this :

adb reboot oem-unlock

My Phone showing this :

Welcome to Fastboot Mode !

What does this mean ? is it because my devices is unlocked already ?
[LG Optimus 4X HD] Jhon998:
replace "880" with 455, as your model... then check.
[LG Optimus 4X HD] TomJ2:
Same here.
[LG Optimus 4X HD] dimi89:
If you took 15 min from your time to read some post on this thread you whould know that you should update to JB (20x) before unlocking your device.Have fun.
[LG Optimus 4X HD] :
Could someone help me with this guide like help me, I'm trying to do it with my lg g2 from tmo. This guide is good but I would like someone to help me 1 on 1.
[LG Optimus 4X HD] Adam77Root:
Don't do.
[LG Optimus 4X HD] juliepac:
Do I need this to install cyanogen?

Hi guys,

I'm super noob, but I'm reading all the posts and following the step by step. I already have all drivers and tools installed on my pc. There's this step I don't understand:

"- a unlockable firmware which is flashed several hours before trying to unlock the bootloader"

Do I need this? What I wanna do is to install cyanogen on my optimus. I think I have to unlock the bootloader, then root it, and then install the cyanogen.

Question:

AM I ON THE RIGHT TRACK?

Thanks a lot,

:confused:

*** problem: I can't update to JB, since thanks to LG Brasil, there's no such update. My android version is 4.0.3 (ICS).
[LG Optimus 4X HD] dimi89:
Download v20x firmware and flesh it thry lg flesh tool you have tutorial here on xda.And yes you cant unlock bootloader on ICS you need JB.
[LG Optimus 4X HD] IBN_EL_NAZER:
But how to re lock the boot-loader ?
[LG Optimus 4X HD] dimi89:
Why whould you like to re lock it ? I dont understand what are you trying to do here.To lock bootloader or to un lock it ?
[LG Optimus 4X HD] invaderjohn:
ive been trying to unlock the bootloader on my lg g2 mini d620, nothing seems to work at all. "adb reboot-bootloader" just reboots the phone "adb reboot oem-unlock" reboots it into battery mode. nothing else seems to work

ive tried the BL-unlock but that didnt work either.. seems like we g2 mini owners missing som folders

take a look at this http://xdaforums.com/showpost.php?p=54183210&postcount=93 theres a screenshot of what happens.

can somebody maybe help me out with this?

i dont see why its so hard to unlock the bootloader on this device :/
[LG Optimus 4X HD] invaderjohn:
i know this. but since no one can help me over at the g2 mini thread and that this solution would perhaps work on my device aswell i just wanted to ask if someone knew.
[LG Optimus 4X HD] :
so uh is this working for anyone?

---------- Post added at 05:56 PM ---------- Previous post was at 05:46 PM ----------

Does this method work for all models of the phone?