Jan
03
Filed Under (LG Android Phones, LG Cell Phone News) by lg-phones on 03-01-2013

This guide is intended to help you to return your LG Optimus G back to stock in order to either fix a bricked LG Optimus G that is stuck with a Security Error or in a bootloop, or just want to return the device for a warranty claim, or to be in a position to receive an official OTA. This should work for almost all bricked LG phones.

How to unbrick LG Optimus G Steps:

1) Download the latest KDZ from LG’s server for your phone: http://www.lg-phones.org/official-stock-lg-optimus-g-firmware-rom.html

2) Make sure you have LG United Drivers already installed, otherwise download from below: http://www.lg-phones.org/lg-optimus-g-usb-driver-download.html

3) Download LG KDZ Updater
https://www.box.com/s/78mnd1hg7hnvi6wqjpt3

4) Download the manual adb wipe batch file
http://www.mediafire.com/?ru7erfxsz7p7s3p

5) Put your Optimus G into Download Mode by switching it off, attaching the usb cable to the phone, holding both the up and down volume buttons at the same time and lastly inserting the usb cable into the computer; wait for the drivers to finish loading if doing it for the first time.

6) Unzip the downloaded updater zip file and run KDZ_FW_UPD.exe. Use the settings below

  • Type: 3GQCT
  • Phone Mode: CS_Emergency
  • KDZ file: navigate to the folder which you have saved the downloaded KDZ from the step (1)
  • Click Launch Software Update and wait for the flash process to finish

7) Your LG Optimus G will restart itself when IParam = 90 is displayed and proceed slower until you see IParam=1 again (which signals the end of flash, you can safely exit the program then and remove the cable from the phone). If phone boots up normally, congrats, skip the steps below and proceed to use the phone as per normal.

However, this most probably will not be the case for newer Optimus-es, as the data partition somehow wasn’t wiped even when KDZ-ed, remaining ‘dirty’, thus causing bootloop or security infringement.

8) If the phone is stuck at the booting up LG/Telco logo, you will need to manually wipe the data partition.

9) Force the phone off by holding the power button for appx 15secs.

10) Put the LG Optimus G into recovery mode by holding the volume up and home button concurrently, then press the power button. Let go of all the buttons after you see the LG logo on screen for the 2nd time and the screen goes blank thereafter (backlight may still be on). The phone will kind of reboot and then enters recovery mode. Repeat the process if you did not get it the first time.

11) With the phone in Recovery Mode, connect it to the computer, wait for the drivers to load (if doing it for the first time), unzip the wipe batch file downloaded earlier from step (4), double click on wipe.bat to execute the wipe command.

12) Your LG Optimus G will auto reboot when wiped and (hopefully) boot as per normal.

THIS METHOD HAS NOT BEEN TESTED BY ME PERSONALLY! (But again, SHOULD be the same….TESTERS WOULD BE NICE)

LG Optimus G Phone Photos - LG Cell Phone Pictures

LG-Optimus-G-2

 

LG Cell Phone – Related Posts

Comments

AWS on 24 February, 2013 at 2:15 am #

hi please check KDZ Updater its not working.


will on 8 April, 2013 at 5:23 pm #

Yes, please check kdz updater, the Download only gave me a Bin file with no KDZ file in it. please help!!!


lg-phones on 8 April, 2013 at 5:40 pm #

balak on 20 April, 2013 at 10:37 pm #

hi,
I am facing the same problem of “security error” while booting with my lg optimus black p970. I have tried to do the above mentioned method but the der is a problem with the drivers. It is not anle to load the device drivers and the mobile is not been detected.


Denis on 23 May, 2013 at 2:58 pm #

I can not open the download mode, I do all how it is in Your intruction, but download mode does not open. Help please!


Jacopazzo99 on 11 July, 2013 at 3:14 am #

I did everything but my G still can’t boot normally. I’m stucked at the LG Bootanimation. i perform the wipe with provided batch file but with no results. damn


katmai on 29 July, 2013 at 4:46 am #

I can boot normally, i can enter into recovery and download mode but no matter what I do , is not detected by any pc… it just charges, I can use the cellphone normally too :'( please help me


Katmai on 29 July, 2013 at 9:49 am #

Sidenote:If i wipe dalvik with android tuner I can get into mtp (usb mode)and lg software… pc suit detects normally but the magic ends when I try to flash firmware as the download mode is not detected at all… , it even enters by itself or key combo, but that´s it


Faseeh on 14 December, 2013 at 1:56 am #

i flashed e975 rom in my f180L. flashed the baseband as of f180L.now the problem is weak signals and i m not able to send sms. I have flashed the stock rom for f180L. but the problem still exists! please help!!


Caryn on 19 January, 2014 at 6:15 pm #

Has anyone had any luck with
this?????


sharas on 16 March, 2014 at 9:54 am #

Thank you, that helped me to restore my phone just be sure you install msxml for kdz updater


Underated lg on 28 March, 2014 at 7:15 pm #

Thank you soo much. worked!! the optimus g is such a beast on paper and i was spewing when i though i coulnt use it again!! but this saved my life


Haris on 19 April, 2014 at 11:46 pm #

luv u… it works… lg is a BEAST………..now Flawless working F180l


MGL on 17 May, 2014 at 4:35 am #

Thank you soo much I couldnt use my phone for so many days Thumbs up


Gustavo on 22 May, 2014 at 12:21 pm #

In this video we teach solve the problem Security Error on LG devices. is very easy to repair. repair security error lg phones easily. With few steps you will have your smartphone lg optimus repaired.
Copy and paste this link into your browser:youtu.be/r5f-9uvu4Tk


jonzkie on 28 May, 2014 at 11:45 pm #

file extration error! why?


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