yashsingh1/xdaforums huggingface dataset:
[LG Optimus 4X HD] jeBACH:
Poor 3G

Hi guys!

I bought an Optimus 4X HD before 2 weeks and the 3G connection was really poor in compare to my previous phones (checked all settings), even with CM11. The previous user never rooted it (personally know him), only the received updates were installed. I thought he was installed a garbage update which has screwed the baseband. So I thought maybe if I go back from V20b to V10a with this tutorial, it may solve the problem.

And BANG!

It solved the problem!

Then installed V20a on it, with this tutorial, root, CWM, CM11 and everything is working.

So I would like to say:

Thank you guys :)
[LG Optimus 4X HD] TheSonic:
Hello,

I want to revert to ICS but I don't know which kdz file to download, I am from Egypt
[LG Optimus 4X HD] tamer7:
v10h I believe was the latest ICS for our country.
[LG Optimus 4X HD] TheSonic:
Did u test it? and if so can you please provide a link :) ?
[LG Optimus 4X HD] tamer7:
I purchased my p880 almost 4 months ago (from Jumia.com.eg) and it had v10h on it as the stock firmware.

It was fine I guess, until I upgraded to v20c (which LG PC Suite detected as the latest), then I started to experience the lags -- even after disabling MLT. But, I don't recall having RIL / network issues.

v10h is still available on http://lg-phone-firmware.com/index.php?id_mod=15 (look under Spain)

Egypt (ARE) follows UAE (see ARE under UAE) for the firmware, and because the latest for UAE is v20c, that's all you'll find under it.
[LG Optimus 4X HD] ylmz82:
i reverted back to ics (10h) too, after trying all the roms around. nothing compares to the stock ics.

i turned to ics to give the phone to my brother. i've been using the rom for a week and i started loving the phone again.
[LG Optimus 4X HD] tamer7:
You can also have v10h as the baseband (which supposedly solves network/3g and gps issues) and be able to use it with any rom you like. see the following thread:

[BASEBANDS][TUTORIAL] Freedom! Choose your baseband

and, on page 6 of the above thread, user [MENTION=5056264]donkanmcklaus[/MENTION] posted a download link for prepared Flash.dz with v10h baseband

Then you can reflash CWM recovery, and your favorite ROM :)
[LG Optimus 4X HD] ladik164:
problem with upgrade

Hi, i have problem with my P880. after 17s upgraging will stop with fail and phone does not work. pleas help. I have boatloader unlocket and i have cm11 before this patch.
[LG Optimus 4X HD] ghayyad:
problem with LGflashtool

i have problem with LGflashtool it dosnt give Ready
[LG Optimus 4X HD] SnXo:
Did u start the app as admin thats the most peoples failure..try it out it should work...if u are on W8 trey a engine with W7

Hope its help

Greets
[LG Optimus 4X HD] Sierra-051:
All COM Ports Are Failing

I can't get any comport to work. All are "unable to be opened".
[LG Optimus 4X HD] Arman.khan:
Phone stuck on Boot screen

I was running CM version 4.4.4 on my P880 and wanted to go back to perivios version. I had Lg flash tool 2014 with me already.

I did the following steps..

1. downloaded latest version of LG USB driver

2. Downloaded the kdz file

3.Went into s/w mode by pressing volume down and plug in usb cable.

4. selected cse flash

Things were good until I receive an error that said "connection to server lost, try again in moment"

I switched off my wifi for laptop and tried again. This time it worked but while it was uploading on the phone at 97% progress, my phone restarted... and then I got an error that said lgusercstool stopped working. Now my phone is stuck on start up screen and just says LG LG :(
[LG Optimus 4X HD] Arman.khan:
Unknown device 00020002

Hi,

Something went terribly wrong with my phone. I was trying to flash it by using above steps... everything went well but when i ran lg flash tool, port 41 status was ready.. again when i removed and reinserted usb cable to phone it says "Unknown Mode error 00020002"...

My phone starts ad stays at LG... It just like stays on the boot screen till it run out of battery :(

Just for info when I go to s/w mode it says on top as boot loader unlocked....

Any help please :(
[LG Optimus 4X HD] Arman.khan:
Fixed :D

tried 2 - 3 times.. replace .tot file wid the kdz file mentioned in the post.. Phone started working :D.... Currently its a bit slow.. but will update with other kdz file found in one of the post on this website....

XDA Rocks :D :D :D
[LG Optimus 4X HD] Code Of Conduct123:
update link

please update the link it hangs at 99 percent
[LG Optimus 4X HD] csaszykj:
Thanks a lot!

Very good step by step guide ;)
[LG Optimus 4X HD] cspius:
It didn't work for me at all with Windows 8 64bit, so I used an old Windows XP Laptop and it worked for the first time! ;)
[LG Optimus 4X HD] djpanos4:
I have a lg p880 running cm-11-20140916-SNAPSHOT (LGP880AT-00-V20b-EUR-XXX-JUL-17-2013)

I want to go back to the original 4.0.3 .

Which files should i download and most important where to find them because all links are dead in this thread!

Thank you in advance
[LG Optimus 4X HD] SnXo:
The links are renewed

I have the links to the files renewed.

greets

SnXo
[LG Optimus 4X HD] Salman Al-Badgail:
Thanks SnXo and RuedasLocas for #7

Both methods work for me :good::laugh:
[LG Optimus 4X HD] Dnelub:
"Follow the instructions to the letter, don't rush and it will work." It worked and revitalized my bricked device!
[LG Optimus 4X HD] salvageyards:
Thanks

:good:
[LG Optimus 4X HD] jigneshandroid:
Hi,

Thanks for your nice post and links for the softwares with detailed procedure to restore/flash LG P880. I have tried to do the same to repair my device but not able to solve the problem

In short, I am getting error as shown in below post, while updating my LG 4X HD. For the details, the phone os is corrupted while installation of third party recovery software, may be bootloader. So now not able to go in recovery mode or boot the phone properly. So tried to restore with KDZ file with both V10 and V20 version of image but not working with either LG (upgrade and recovery repair) or with LG Flash tool as per your post.

Please guide if get some hint.

http://xdaforums.com/showpost.php?p=64958099&postcount=24

Thanks and best regards,

Jignesh
[LG Optimus 4X HD] Salman Al-Badgail:
Post full screenshot unable to see .dll

---------- Post added at 06:50 PM ---------- Previous post was at 06:39 PM ----------

@jigneshandriod you had selected wrong .dll file in flash tool, Select X3_2008_v0.0.6.9.dll file and than follow the procedure and than you're good to go. All the Best :good:
[LG Optimus 4X HD] Salman Al-Badgail:
Jigneshandriod Plz refer to this image.

In Model you should get X3 and run the flash tool as administrator and follow procedure/steps.

:good:
[LG Optimus 4X HD] jigneshandroid:
I have used X3 dll but still have the same or similar problem. Please find the attached image and also log xml.

:confused:
[LG Optimus 4X HD] Salman Al-Badgail:
Mate you are selecting the wrong .dll file,

download the attachment from below.
[LG Optimus 4X HD] jigneshandroid:
I will try use another computer..now

---------- Post added at 03:11 PM ---------- Previous post was at 03:08 PM ----------

I think its the same file which you have suggested before and also tried with that the situation is same.
[LG Optimus 4X HD] Salman Al-Badgail:
Extract the attachment and run the flash tool as administrator,select X3_2008_v0.0.6.9.dll file and in S/W select any v10xx or v20xx and follow the procedure post #1 from following thread. dont rush follow each and every step properly.

No, you are selecting P880.dll its completely wrong, select X3_2008_v0.0.6.9.dll from extracted attachments,

---------- Post added at 07:49 PM ---------- Previous post was at 07:46 PM ----------

Did you downloaded attachment?????
[LG Optimus 4X HD] jigneshandroid:
Yes I have taken new attachement dll but the issue was not will dll. Actually LG Flash tool always taking the default dll kept in that folder I have renamed that dll files to some garbage after that it started to detect the dll which I have selected in manual selection. So now its showing X3 but the issue and error is same.
[LG Optimus 4X HD] jigneshandroid:
But there is some hope as when I have tried to flash last week it was showing IMEI in xml error log but now I am geeting imeiinvalid so may be I will try after some time if I get IMEI detected than may be process will go progress.

:fingers-crossed:
[LG Optimus 4X HD] Salman Al-Badgail:
try using another ports, deselect port 1 and try with other ports by following the remaining steps,may be this could help you
[LG Optimus 4X HD] Salman Al-Badgail:
Have a look at my log too, its shows IMEINOTACTIVE and result PASS, like I told unmark port 1 and try again.

GoodLuck:good:
[LG Optimus 4X HD] yunsen:
the process doesnt work for me the minute i connect my sw update mode lg p880 it says error in the flash tool.

I tried everything do you have any clue or hint for me
[LG Optimus 4X HD] fugitive666:
18% download fail

After going to 18% it says download fail how to solve this
[LG Optimus 4X HD] Salman Al-Badgail:
Post some screenshots and logs, so that we can help you.
[LG Optimus 4X HD] fugitive666:
http://dl-1.va.us.xda-developers.com/thumbs/3/6/2/0/5/9/5/3620595.png

I am having the same problem as in comment #231

I tried different ports as well bu same error is being shown.
[LG Optimus 4X HD] Salman Al-Badgail:
Screenshot is too small to see, try adding in to this forum by replying to my post below you see manage attachments below to additional Options. If problem is like #231 than you can solve it by selecting only port 1 and follow the steps :)
[LG Optimus 4X HD] fugitive666:
Please see the log. I have posted the log as well. I think that can help to find out the error.
[LG Optimus 4X HD] fugitive666:
anyone there to help me
[LG Optimus 4X HD] RuedasLocas:
I don't believe that after 4 years people still have problems flashing this device.... I still have it, a damn good phone!!! I also have a g2 mini but lg 4x is much better looking and it might sound weird but, after bloatware being uninstalled 4X HD is faster :)

I still flash my phone like I always did. See http://xdaforums.com/showpost.php?p=38838927&postcount=7

Sometimes, mostly after I reinstall my windows, I need more time for the phone (all the hardware) be recognized and drivers be installed, but apart of that I never had problems. Just need to click on the icon when windows shows that detected a device and wait until see all the hardware with a green mark. Only after that is possible to proceed.

If someone have a problem following my method, I thing that the drivers are not the correct ones, or the cable is not good, or some other problem with the computer.

All the files and programs are provided to download on the link above, soo...

If you're having problems with this device, never try to root a LG2 mini. That's a real headache!!! :silly:

Good luck to all and keep calm, no rush!!!

Best regards,

RuedasLocas
[LG Optimus 4X HD] ze7zez:
These are the users of the equipment second hand.

I am also happy with the P880 after taking root, removing blootware and installing the Tegra Overlock.

I have never used on the CM, because there was no such need:

If everything works, then why change?
[LG Optimus 4X HD] RuedasLocas:
I had it installed (CM) but I gave up due to some bugs never solved. The stock firmware is very good and it looks great.

LG 4X HD substitute, will be probably the G4 but, I don't imagine myself with such a big device. It will be just because of the camera...
[LG Optimus 4X HD] GeetaA:
:(

Hola, tengo un LG P880 en 4.0.3 V10

Intenté instalarle un Custom Recovery con ROM Manager y se me bloqueó el bootloader (el recovery no sirve, y no tengo forma de hacerle wipe) y estuve intentando varios métodos para poder instalarle 4.1.2 y luego subirlo a 4.4, pero no hay forma. Ninguno de los programas me funcionan. El KDZ_FW_UPD se queda en el número 207, el LGMobile Support Tool no me lo actualiza. Intenté un LGFlash tool distinto al tuyo que me corría el LG Mobile pero cuando el celular se ponía en S/W no lo reconocía y nunca le instaló el sistema.

El LGFlash Tool que usaste en tu vídeo nunca me reconoce el teléfono en la parte de arriba (El tuyo dice X3, el mío se queda en blanco) y cuando le doy a lo de cargar los puertos se queda pegado y no me carga ninguno. No se que otra cosa hacerle. Estoy desesperada intentando solucionar el problema.

Tengo Windows 8, no sé si eso cambie en algo.

Hi, I have a LG P880 in 4.0.3 V10

I tried installing a Custom Recovery with ROM Manager and I blocked the boot loader (the recovery does not work, and I have no way to wipe the phone) and I was trying several methods to set you up 4.1.2 and then upload it to 4.4, but there's no way. None of the programs work for me. The KDZ_FW_UPD stays at number 207, the LGMobile Support Tool does not update it. I tried a different LGFlash Tool than yours but when the phone stays on S/W the program doesn't recognize the phone

The LGFlash Tool that you used in your video never recognize me the phone at the top (Yours says X3, mine goes blank) and when I give it to loading ports is stuck and none I load. Not otherwise make. I'm desperately trying to solve the problem.

Windows 8 I do not know if that changes anything.

Sorry for my bad english xD﻿
[LG Optimus 4X HD] RuedasLocas:
Bueno, intenta hacer como lo explique yo y con los drivers y programas de mis enlaces. Con calma para que no se te olvide nada.

Try to do it as I explained, with the drivers and programs that I provide on the links.
[LG Optimus 4X HD] BrunoCK:
Só me apareceram 3 ports...:crying::rolleyes::rolleyes:
[LG Optimus 4X HD] kietakas:
When I run lgflashtool and click the yellow arrow, all ports just show READY and nothing changes. I run it as admin of course. What could be the problem?
[LG Optimus 4X HD] BrunoCK:
I have no idea , realy , i sent my phone to consert...
[LG Optimus 4X HD] MattheewHun:
Why dont you try the another kdz flasher app?
[LG Optimus 4X HD] kietakas:
I've tried to follow steps from post 1 instead of 7 and now I'm getting a FAIL after 10% with an error IMEINOTACTIVE (error log attached). Anyone know what can I do?

Tried KDZ flasher, it gets stuck at "wparam = 2010 lparam = 210" forever.
[LG Optimus 4X HD] juanmartinf:
God damned Genius!!!!!!

I had my optimus 4x hd p880 almost dead, and the only way to get it back to life was this tutorial. Thanks a lot Ruedas Locas !!!!!!!!
[LG Optimus 4X HD] Phil_Smith:
Exact same thing here.

I know that this is caused by the Windows version, but I don't know how to solve this other than using a Windows 7 machine.

I'm on Windows 10 x64 and just can't get it to work, not even using a virtual machine emulating win7...

Just don't get what can make the difference to a vm ?
[LG Optimus 4X HD] ze7zez:
Cool! The first four links still work. :highfive:
[LG Optimus 4X HD] saKE12:
side by side error

side by side error when open lg flash tool
[LG Optimus 4X HD] vrmanzacky:
anyone can restore using LG BACKUP TOOLS ??

in aplication say "The backup file cannot be read"
[LG Optimus 4X HD] SnXo:
Turtorial

I´ve made a smal Videotorturial for this thread.

http://www.youtube.com/watch?v=NDyZ8pH2jp0

greetings

by SnXo

P.S: Thanks RuedasLocas for your notes
[LG Optimus 4X HD] tiflao:
Thxxxxsss!!! U can make one video for root and hot install CWM?

Thx!
[LG Optimus 4X HD] kaisersosay:
why?

Silly question maybe but us it the kernel change that comes with v20a that doesnt allow us to just flash 10d the same way we flashed the jb leak with fwd kdz updater?
[LG Optimus 4X HD] @non4:
V20a has new bootloader but old kdz files just used the existing bootloader
[LG Optimus 4X HD] e-53e:
I have a little problem... it doesn't works, look at the attached files, thats what I obtain...

What can I do?

(sorry for my english)
[LG Optimus 4X HD] Norse_Viking:
Which windows do you use? I got the same results on my win8 pc, had to use a win7 pc in the end
[LG Optimus 4X HD] RuedasLocas:
Be sure that you follow all steps.

I don't see the the model in those pictures... select the .dll once again.
[LG Optimus 4X HD] e-53e:
I use win 7

Oops! I see that I forgot to intall the .msi ^^

but it's the same :(
[LG Optimus 4X HD] gtdaniel:
check at first picture

Connection Mode - UART - is wrong

must be USB
[LG Optimus 4X HD] RuedasLocas:
In the second picture, in the pink part ,on the top, where is "MODEL" should be "X3" and you don't have nothing there...

Take a look at the video here:

http://xdaforums.com/showpost.php?p=38838927&postcount=7

---------- Post added at 08:57 PM ---------- Previous post was at 08:56 PM ----------

Connection mode is not important, port selection is...

---------- Post added at 09:01 PM ---------- Previous post was at 08:57 PM ----------

What you need to flash kdz etc... is "msxml" and "windows enabler" too for kdz.

LGFlash Tool don't need "windows enabler".
[LG Optimus 4X HD] e-53e:
I already tried it and it's the same. :confused:
[LG Optimus 4X HD] dann1989:
I have win 8 64bit,

I install drivers

1) LGUnitedMobileDriver_S4981CAN36AP22_ML_WHQL_Ver_3[1].6.exe

2) LGUnitedMobileDriver_S4981MAN36AP22_ML_WHQL_Ver_3[1].6.exe

and install latest drivers for lg P880 LGUnitedMobileDriver_S4981MAN38AP22_ML_WHQL_Ver_3.8.1.exe (with latest drivers all went well) :o

without latest drivers for me not working. :(
[LG Optimus 4X HD] Trigun:
This just saved my bacon! You sir are a prince among men!
[LG Optimus 4X HD] gtdaniel:
somehow your phone is not detected (model - missing, icons in left part of upper menu is grayout)...

driver is installed ok? selection of port41 is made in configuration of driver?

the phone display S/W Upgrade mode?

make all steps from beggining, make sure not forget one...
[LG Optimus 4X HD] e-53e:
It's all the problem! There is no" X3" and on the first window there is no little square on thé top lecture, like in the two vidéos...

sent from my LG 4X

sorry for my English (I'm French)
[LG Optimus 4X HD] RuedasLocas:
If you're with win7 you shouldn't have problems...

Sure that the .dz and .dll files are not corrupted?7

My advice is to download all the files and restart the entire procedure.

But before, try to restart your computer and try to flash it again.

Good luck!
[LG Optimus 4X HD] e-53e:
I did all the steps, one by one...

and my phone is still not detected...

well, I will see this tomorow, cause now in france it's night ;)

and thank you all!
[LG Optimus 4X HD] thecresta:
STOP!

Before you follow this guide, look at this:

http://xdaforums.com/showthread.php?p=38876171

:good:
[LG Optimus 4X HD] e-53e:
Yeah! :thumbsup:

Try this at home!

sent from my LG 4X

sorry for my English (I'm French)
[LG Optimus 4X HD] LamerDuck:
erm...

i wonder which 10h version this flashes to?

as you may be aware, there are about 20 different versions of 10h.

which one is this?

maybe i overlooked something, because noone else did ask...?

Oh ok i see, EUR-XXX
[LG Optimus 4X HD] jhayton:
I'm curious... What is the importance of removing the sim when flashing back. Could the presence or lack there of affect firmware? I don't recall if I had mine out or not when I rolled back and then re flashed v20.
[LG Optimus 4X HD] SnXo:
It is not absolutely necessary but it is better to reduce error sources.
[LG Optimus 4X HD] palalos81:
it does not work it stops in 10% and fails.

the problem solved via changing the phone mode on kdz software update from diag to emergency and reflash the rom. thanks for the interest .
[LG Optimus 4X HD] nedooo:
This doesn't handle kdz and there is no diag - emergency toggle???

It worked for me, just needed to start LGFlashTool.exe as administrator, are you sure you replied to right post???
[LG Optimus 4X HD] Fladder72:
Dosn´t work for me. I´ve tried different drivers, edited port settings in device manager and run LG FlashTool as admin, but no activity on ready ports...

Maybe an issue with USB Ports on my Computer...
[LG Optimus 4X HD] RuedasLocas:
Maybe you need to un-install and re-install the drivers...

Having PC Suite installed might helps somehow...

In these things we need to have imagination.
[LG Optimus 4X HD] Fladder72:
I have unistalled/reinstalled drivers and newest PC Suite, no change... I´ve used different/fresh Windows installations (Win7 64 Bit), same at all :(
[LG Optimus 4X HD] xgnesh39:
Me too, having same problem with this downgrade to V10H, my pc cant read the LG CDMA MODEM PORT... When installed, it shows connected to COM27..but in LGFlash Tool it cant read at all ..
[LG Optimus 4X HD] issak:
right click on lg cdma port and choose properties then from port setting ---> advanced change com to com 41

---------- Post added at 02:30 PM ---------- Previous post was at 02:28 PM ----------

use original guide on post #1. this guide work for me
[LG Optimus 4X HD] @lbert:
I went through the first method successfully and downgraded to 10h, then used the same method to upgrade to 20a. Hoping that I'd end up with a EUR rom, it turned out to be 20a-234-000 once again, no unlock possible (although thanks to everyone who helped me get the fastboot drivers working, I get the ultra small text menu option to unlock but it doesn't work.)

So in short, downgrading works fine but upgrading even without the SIM and SD cards inserted still takes me back up to the 234 rom.
[LG Optimus 4X HD] valentinrascu:
R: Rollback Optimus 4X HD from 4.1.2 JellyBean to 4.0.3 Stock ICS

No "uart"conection... only usb.

Inviato dal mio LG-P880 con Tapatalk 2
[LG Optimus 4X HD] RuedasLocas:
Only way to change to UART if USB is selected from previous flash, is turn ON "Windows Enabler".
[LG Optimus 4X HD] arararagi:
Does anyone know a way to roll back without wiping /data?

Using KDZ_FW_UPD or UpTestEX_mod2_marwin doesn't flash the bootloader so the ICS kernel won't boot.
[LG Optimus 4X HD] xgnesh39:
Finally I managed to revert back to ICS v10H as per method 1 (post 1)..
[LG Optimus 4X HD] Fladder72:
Ha, found it. I have tried an other USB cable... And now I´m back on ICS...:good:

Now I wait for unlockable BL working with my IMEI :confused:
[LG Optimus 4X HD] @non4:
Back on 10d with method 1, other method doesnt work at all!

Sent from my rooted and beanified P880
[LG Optimus 4X HD] xgnesh39:
Why suddendly LGFlashTool showing offline? Any help pls
[LG Optimus 4X HD] SnXo:
Did u have work like the tut on first page? Maybe it helps if u looks the video http://www.youtube.com/watch?v=NDyZ8pH2jp0

.

Maybe it helps you post some screens from your settings about flash tool...but if u work true the howto it should work properly! Did you something changed on your settings? Or forgotten to disable/quit the windows enabler? With enabled Windows enabler it wouldn't work!

greetings
[LG Optimus 4X HD] Spongengebob:
Hey when i try it this happens, and yes i did all so like the tutorial tell it.

What can I do? Or it is normal?
[LG Optimus 4X HD] SnXo:
Thats looks normal! You have to wait till the progress is done and your mobile do Re Boot!
[LG Optimus 4X HD] fcorazza:
Stuck in Ready state

I'm having no luck with this. I've installed the drivers, modified port to be COM41, selected dll + dz and usb mode in LG Tool, selected port one, I press the start button and it remains stuck in READY state, no progress. I've tried selecting all ports and all ports show READY.

Phone is currently connected and detected, on screen shows the S/W Upgrade screen, on the top "Bootloader state: unlocked".

I want to roll back to 10H since I need to send this phone to service (earpiece jitters) but I've upgraded to JB, unlocked bootloader and installed CWM. Is there a way to rollback to 10H or am I stuck with the leaked version? I'm using the provided LG USB cable, tried also with the Samsung one but getting the same issue. Tried this on two different laptops (both Win7 SP1 64bit). msxml is installed but I believe that's needed only for logging. Any help would be appreciated, thanks!

EDIT: ok I must be really dumb, did not disconnect and reconnect, now it's in progress, cheers ;)
[LG Optimus 4X HD] RuedasLocas:
Try to download the "kdz-updater" folder again. Maybe some corrupted file inside...
[LG Optimus 4X HD] SnXo:
Try this: when phone on SW and the flash tool in ready state...disconnect Usb wait shortly and connect again...maybe u forgot on it.

Hope thats the issue...

Greets