Filed Under (LG Android Phones, LG Optimus Series, LG Phone Problem and Solution) by lg-phones on 02-11-2011

Hi, LG Optimus 2X owners, here’s a great tip! I got an interesting tutorial on how to install kdz firmware on your LG Optimus 2X. A full guide that will lead you through every step to successfully upgrade your phone, including a list of the necessary files, preparing your phone and flashing, all explained on a very easy language and including all the necessary files. Be sure to understand all instructions before proceeding and don’t forget to leave your feedback. LG Android Phones

All things you will need before flashing your LG Optimus 2X:

  3. Android 2.3.4 Gingerbread V20L(latest):

How to flash LG Optimus 2X with a kdz file steps: LG Phone Problem and Solution

  1. Download
  2. Install B2CAppSetup.exe (if you don’t have) B2CAppSetup.exe
  3. Install USB drivers from this program (if you don’t have)
  4. Turn on “debug mode” in phone (menu/settings/application/development/USB debugging), then plug in into computer.
  5. Wait for driver installation.
  6. Install Msxml.msi (right button in mouse)
  7. Use Enabler.exe and turn to “ON”
  8. Turn On UpTestEX_mod2_marwin.exe .select your KDZ file. Set emergency, 3gQCT as pictured and press “NORMALL WEB UPGRADE TEST. (on screenshot)
  9. Flash starts automatically.

After flashing LG Optimus 2X reboots automatically. LG-Optimus info

Update:  How to Root LG Optimus 2X Android 2.3.4 Gingerbread

Caution: You flash it at your own risk. Backup everything

LG Cell Phone – Related Posts


Gingerbread para LG Optimus 2X on 2 November, 2011 at 2:54 am #

[…] How to Flash LG Optimus 2X to Gingerbread […]

alex on 2 November, 2011 at 6:25 am #

Thanks !!!!! It worked perfectly. First impressions is that the phone is faster :)

Xavi on 2 November, 2011 at 7:27 am #

Is the OTA Gingerbread version? No have to root the phone? Thanks!!

Dyramometer on 2 November, 2011 at 8:40 am #

Is this update available for the Netherlands too, or just for the country’s mentioned above?

Angel Becerra on 2 November, 2011 at 12:40 pm #

Excelente guia … facil y rapido … muchas gracias desde Mexico !

Manuel on 2 November, 2011 at 8:55 pm #

Funcionara para celulares de México con Telcel? Es la actualizacion oficial de LG? jejeje, gracias!!! P.D. Es un Optimus 2x

Manuel on 2 November, 2011 at 10:34 pm #

Bueno, decidi intentarlo, hasta ahora todo funciona muy bien, no le ha fallado nada, la camara va perfecta (: Saludos desde México

Kristian on 3 November, 2011 at 2:47 am #

i have android 2.2.2 and have LGE of V10e is it safe for me to flash it?

Rahul on 3 November, 2011 at 10:15 am #

The procedure does not work for anyone i think !!!!!
It’s giving some error !!!
Plz tell how to upgrade it properly !!!
Do we need to remove the battery and enter into s/w upgrade mode or not !!!!!!
Plz plz plz help @@@@@@@@@

Manuel on 3 November, 2011 at 6:01 pm #

Rahul… It worked for me, It didn’t give any error. I did not remove the batery or enter into s/w upgrate mode. I’m from Mexico and I just followed the steps the way it says 😀

Aleks on 3 November, 2011 at 11:04 pm #

Hello I am from Mexico, is this FIRMWARE, unblocked to use it in TELCEL, MEXICO?

Manuel: Tuviste que desbloquearlo o simplemente lo instalaste y LISTO!, saludos desde Mexico.

Károly on 4 November, 2011 at 12:22 am #

Words very well in hungary! cheers for the solution!

Juan on 4 November, 2011 at 2:13 am #

Actualice el equipo paso a paso y todo perfecto pero no pude arreglar el 3g ):

Telcel Mexico

Aleks on 4 November, 2011 at 12:11 pm #

It is not necessary to ask anymore if this FIRMWARE works, I follow the instructions an it works.


JUAN: A que te refieres con 3G, al INTERNET vía 3G o la selección del operador TELCEL en banda 3G?


Manuel on 4 November, 2011 at 1:06 pm #

Aleks: Solo lo instale y listo, no tube que desbloquear nada de nada (Tengo Telcel)xD Me funciono muy bien, intentalo y me cuentas como te fue a ti, va?

Aleks on 4 November, 2011 at 1:23 pm #

Manuel: Thank you it worked well on my LG Optimus 2x for TELCEL MÉXICO, I just couldn’t get working the NETFILX app, could be the misconfiguration of COUNTRY or lack of compatibility between GB 2.3.4 and 2.3.7, because I have it running on a Cyanogen 7.1 the yesterday nigthly.

Manuel: Gracias!, ya lo instalé me aventé al ruedo y listo… solo que no pude hacer funcionar la aplicación NETFLIX, eso me hace pensar dos cosas ó está mal configurado el PAIS o de plano esta versión de GINGERBREAD no es compatible a la 2.3.7 que tenía en la cyanogen…


Shah on 5 November, 2011 at 10:15 am #

Use Enabler.exe and turn to “ON” <– where to find this ?

Turn On UpTestEX_mod2_marwin.exe .select your KDZ file. Set emergency, <– also this

Aleks on 5 November, 2011 at 6:18 pm #

My Friend Shah, all you need it’s in:
+- B2CAppSetup.exe
+- Msxml.msi
+- Windows Enabler.exe (Enabler.exe)
+- UpTestEX_mod2_marwin.exe

Download all stuff follow the STEPS, see the images, AND enjoy!

rcaui on 9 November, 2011 at 5:40 am #

tengo una duda….soy de mexico, mi optimus 2x, esta rooteado y le instale el clockmod, eso no debe signifcar ningun problema?…funciona todo bien…es decir la conexion a red 3g es estable? el gps funciona?la salida HDMI funciona?…estoy pensando si me espero o lo actualizo de una vez…

Bryan on 11 November, 2011 at 4:31 am #

The update was great, but i can’t change the language (when i want to write an sms) to hungarian or english :( The language all the time Far-Eastern is left over :(

Bryan on 11 November, 2011 at 6:30 am #

The problem was resolved :)

Muraliz on 11 November, 2011 at 9:51 pm #

Please help me. I don’t understand with the last screenshot of the step 8 (pic3). Is that compulsory to change the country and language to Hungarian?? OR can choose others??

Ik on 12 November, 2011 at 7:23 am #

It works great:)
(From netherlands, EU open)

lolerow on 12 November, 2011 at 5:53 pm #

Can i pick another language besides “hungarian”?? please is urgent

master2011 on 12 November, 2011 at 6:07 pm #

Eso mismo, puedo seleccionar otro lenguaje en vez de “hungarian”?

Shah on 13 November, 2011 at 6:26 am #

Where do I download the
“Msxml.msi” ,
“Enabler.exe” and

somebody on 13 November, 2011 at 8:25 am #

The “hungarian” language issue: you can pick any language you want. I think is only the language of install program.

The files problem: all the files are compressed on zip files ready to download above.

Shah on 13 November, 2011 at 10:41 am #

Do I need to switch off the phone, remove SIM Card, memory card or anything like that??? It says R&D Test Tool (Not responding)

Shah on 13 November, 2011 at 10:49 am #

When I click NORMAL WEB UPGRADE, it takes me to another window to Start the upgrade. Is the button I must press or is it the one on the main window?

Andi on 13 November, 2011 at 1:05 pm #

could you re post the image in another link, can’t see it in indonesia. it says domain unregistered, block login !! Help pleaseeee

msantaka on 15 November, 2011 at 7:30 am #

Works good, man. Thank you.

When you click the, normal web upgrade, click the, update start (or update now, I forgot) button. And on “Set emergency, 3gQCT”, emergency is on phone mode, top right. And 3gqct is on the top left with “select type”.

pratik on 15 November, 2011 at 9:42 am #

will this update work in India??
will it gives any type of error????

pratik on 15 November, 2011 at 9:48 am #

is there any internet connection required???

Roberto on 18 November, 2011 at 10:40 am #

Hey I tried did and it worked, but I’ve got a problem. The clear button on the notification bar disappeared. Anyone else experienced the same thing?

popoito on 18 November, 2011 at 10:22 pm #

problem with 3g cannot connect using 3g only wifi!

Salvador on 21 November, 2011 at 4:18 pm #

You need to configure 3G manually, but is really easy, for Mexico/Telcel do this:

Termiborg on 24 November, 2011 at 1:41 am #

“The program quit unexpectedly” Now that’s odd…
I might be an idiot when it comes to rom flashing, so can someone please explain how to get to the third screenshot, in step 8? As for the program quit unexpectedly, that happens after I press the start upgrade button on the main screen of the R&D test tool. If I do what the pics said, and press the same button inside the normal web upgrade test menu, it just jumps back to the main screen, and nothing happens. Any guesses?

Termiborg on 24 November, 2011 at 6:32 am #

Never mind, figured out the problem.

Shaik on 25 November, 2011 at 5:33 am #

did evrything as shown in the pictures but still got strucked at 4% during the update :-(…It is asking me to restart the phone and connect back did that twice but still no use

Vanet on 26 November, 2011 at 12:55 am #


I have the same problem Bryan had. If I change the keyborad language to english or hungarian, I only can use the language, what was installed with the update (some Far-Eastern Language).

Murtaza Hasan on 27 November, 2011 at 6:31 am #

same issue with me shaik…. some help anyone?

Daryl on 28 November, 2011 at 4:10 pm #

I was stuck at 4% but I noticed windows was installing drivers in the background. Then I did it a second time and everything went smoothly. It probably worked the second time because all the drivers were installed when it got stuck at 4% and it just needed a fresh start so that the drivers will work properly. Sorta when you install a new driver for something and you have to reboot your PC. Hope this helps.

Alextrem on 29 November, 2011 at 5:56 am #


Anonymous on 3 December, 2011 at 8:51 pm #

is this firmware suitable for Malasian telco?

Danny on 3 December, 2011 at 8:53 pm #

are this firmware suitable for Malaysian Telco?

sp on 6 December, 2011 at 3:04 pm #

hello friends…
is this official gingerbread ie 2.3.4 is better than that of custom ROM (cyanogenmod 7.1) gingerbread 2.3.7…

2) I am already on custom rom and my phone is working very fast should I change it and come to official rom…?

3) what was the available free RAM when the phone booted first time….?

please answer me because your suggestion will make my next decision..


z on 10 December, 2011 at 9:25 am #

stuck on boot

z on 10 December, 2011 at 9:27 am #


Tim on 10 December, 2011 at 11:32 am #

The installation completed.
But now my phone reboots every time on boot

(downgrade V20L -> V10B)

musa on 14 December, 2011 at 12:30 pm #

is it compatible with wind mobile canada thanks

pratik on 23 December, 2011 at 2:30 am #

hi i have a lg p500 android and i want to update a 2.3.4 so pleace help me yo update.

adreas on 25 December, 2011 at 4:11 am #

should i backup my phone files before do this or it is not necessary..?
thanks in advance

dev on 29 December, 2011 at 11:49 pm #

from V10d to V20L success.. thanks a lot for the tutorial 😀

bhahar84 on 31 December, 2011 at 2:28 am #

am running v20L now, thanks for the tutorial… my Optimus 2X works way smooth and really fast now… got my GPS working again (which previously didn’t work properly after the v20E upgrade)

Thanks 😉

ivan on 3 January, 2012 at 2:20 am #

Thanks! It worked ok. My lg is now much faster but my gps do not work properly any more.
Does any one have some idea what shod I do?

Iceman the Frozen on 4 January, 2012 at 2:58 am #

I am not able to run B2CAppSetup.exe – after download it runs, starts downloading some more and stucks at the very beginning. Is there a way how to directly download whole B2CAppSetup.exe?

c.corax on 27 January, 2012 at 11:28 am #

You forgot to tell newbies like me one crucial thing! Do you download all the stuff to the phone and unpack or to the computer?????? I am reading this from my computer for example. I really don’t know what to do, don’t know if my phone can unzip, how to get the files to the phone, etc. On my Galaxy, it’s easy. Not so easy on an LG.

jtbthatsme on 28 January, 2012 at 2:04 am #

Well it’s been a week since I upgraded and my phone’s not had the Black screen shut off problem once. I would say it was a nervous time of it as it kept asking to have me remove battery and restart the phone but in the end it worked well. The only issue I’m having is with poweramp but that’s something I’m not that fussed about. Thank you so much I was just about to send it away to try for a replacement.

jojo on 30 January, 2012 at 9:43 am #

dont happy whit this now 2012 new version LG UPDATER cant not selected langue and dowgrade no upgrade….i try this year plsss fix…

ajie on 3 February, 2012 at 12:51 pm #

Please update all download link…Filesonic is disabled…

Prabathe on 7 February, 2012 at 9:28 am #

Hi pls update new upload files Filesonic is disabled.
Its a great help…

enguagcha on 10 February, 2012 at 11:28 pm #

please i need help
for me it’s impossible to add something to uptestex it’s like a photo i put win user on but the error still

enguagcha on 14 February, 2012 at 7:35 am #

please help
i have updated my lg optimus 2x to cm7 and i wanna go back to official gingerbread 2.3.4 from LG please is there a possibility to do this

jaynesh on 9 April, 2012 at 8:54 pm #

hi how do we download pic frm lg wen i contact it to ma pc it doesnt loads it

gerald on 26 June, 2012 at 8:15 pm #

i cant says its already updated =(

Niels on 22 December, 2012 at 10:49 am #

When i downgrade my lg optimus x2 speed back from ICS to GB it gives a bootloop, how can i fix this???

Darius on 14 September, 2013 at 3:55 am #

Hey, then I hit button upgrade start I am getting message: LG Mobile Phone S/W Upgrade is already running. I don’t know what to do. Please can you help me? My phone have ICS, but its sucks, so I want to downgrade to gingerbread.

tharu on 25 October, 2013 at 4:12 am #

R&D test tool not responding when extracting kdz file.Why is that?

tharu on 25 October, 2013 at 4:13 am #

Please help me soon…

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