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How to Unbrick LG Optimus L3 E400 with KDZ Updater

LG Optimus L3 White Photos images

LG Optimus L3 may be bricked due to rooting or flashing any custom ROM’s. Then, you can’t able to use your mobile. You need to flash your Stock ROM back on your LG Optimus L3 android smartphone. Here is a guide to unbrick/flash stock ROM on your mobile.

LG Optimus L3 E400 has comes with Android 2.3 Gingerbread as a default Operating System of it. And the phone has 3.15 Mega Pixel Camera capable to record 2048×1536 pixels. And the phone has 3.2 inch TFT Capacitive Touch Screen which is capable of 240 x 320 pixels. The phone has comes with internal memory as 1 GB and 384 MB of RAM. The phone is the one of the best Android smartphone in its price range. And another important feature is comes with 800 MHz processor.

Unbrick Install Stock firmware LG Optimus L3 White Photos images


  • We are not responsible for any damages that may happened due to using this guide to your phone. If any problem happened that related to flashing instructions, we will help you to solve it.
  • Use this guide at your own risk. We shall not have any liability or responsibility for whatever happens to you and your device by using the instructions in this guide.
  • The instructions provided in this tutorial for educational purpose only. There is no guarantee that these steps will work for your device.
  • The steps given in this tutorial is only to use with LG Optimus L3. And the model number is E400. Applying this guide to any other device or any other model may produce many problems.
  • Read and Understand the whole tutorial first, before going to perform the steps.

Pre Requirements to Flash / Unbrick LG Optimus L3 E400:

  • We recommend you to take a backup of your data in the mobile using PC suite or any other method. After flashing the mobile, the data will be deleted. Then you can restore it from the backup file.
  • SMS – How to Backup Messages
  • Contacts – Sync with Gmail App
  • Videos, Images, Songs and Other Files – Copy to internal / External SD card or System
  • APN Settings – Take Manual Note from “Settings > Wireless & Networks > Mobile Networks > Access Point Names
  • And maintain minimum 60% charge in your mobile’s battery. This will help your device to don’t get switched off.
  • Then Enable USB Debugging – “Settings > Applications > Development > USB Debugging”
  • After that Disable all antivirus and firewalls in your PC or Laptop. Because these tools interrupts the process during the flashing.

How to Flash Stock Firmware on LG Optimus L3 E400:

  • First you need to install USB drivers. So, Download and install the LG mobile Drivers on your PC or Laptop.
  • Download the official Stock firmware for your phone – Here
  • Download the KDZ updater tool – Here
  • Then you need to open Emergency mode in your phone. For that, remove battery from phone and re insert it back on mobile. Don’t switch on the phone. You need to press and hold Volume UP + Volume DOWN + Power button together untill you get the yellow screen and Shows text in black color as Emergency Mode.
  • Then connect your mobile with PC or Laptop using original USB Data cable. Using other USB data cables may produce not detecting problems.
  • Then open KDZ Updater tool. Make sure you are in Administrator account.
  • Then choose, 3GQCT as a type, DIAG as Phone Mode, And select KDZ file option to browse and select the downloaded .kdz file.
  • Make sure you done all the above steps.
  • Then click on Launch Software Update button.
  • This process may take long time to complete. After that the stock ROM has flashed on your device.
  • After the process done, you can see the message Finished in log screen of the tool.
  • Then your mobile will be switched off. And you need to restart the mobile.
  • Then it will take some long time for the first boot.

You can get all the news and Guides about LG Optimus L3 E400 – Here

Do share in comment section if you met any problems or any errors, then we can help to solve it. In future we will update custom ROM’s for your LG Optimus L3. So, stay updated. Now you have successfully learned how to unbrick / Flash LG Optimus L3 E400.



  1. Kristoffer Kaabay

    November 17, 2012 at 10:46 am

    my lg-e400 is not opening.. stock on clockwork recovery..
    i try to delete all users data it says: unable to mount sdcard/.android_secure,

    • tribhuvan

      October 27, 2013 at 2:56 pm

      Bro give me the link of stock rom plzz i hav nothing backup ………plzzzz urgent bros

  2. Kristoffer Kaabay

    November 17, 2012 at 11:10 am

    please upload a video..

    i dont have any lg software fixer

  3. Kartik Patil

    November 25, 2012 at 12:16 pm

    it doesn’t work…!

  4. yojavi

    November 26, 2012 at 6:13 am

    please upload video

  5. Brenz Cyril Feratero

    November 30, 2012 at 6:50 am

    it works but my phone keeps on restarting……

  6. Ali Baiar

    December 6, 2012 at 2:07 am

    if u having bootloop problems..then go to recovery mode..NOT emergency..and wipe cache+data..and after reboot phone from clockwork works to me now..

  7. Hachmi Benanane

    December 17, 2012 at 1:05 am

    fuck you

  8. Guest

    December 17, 2012 at 1:05 am


  9. Hachmi Benanane

    December 17, 2012 at 1:05 am

    donky romeo

  10. Hachmi Benanane

    December 17, 2012 at 1:07 am

    fuck you

  11. Neno Bozinovski

    January 30, 2013 at 8:33 pm

    its say phone was not found please helppp

  12. don jon

    February 3, 2013 at 2:31 am

    Hiya, my phone (e400) really appears to be bricked… it does not respond to either power or power+vol dn or vol up + vol dn + power… totally non-responsive screen. I know that the charge was at 80% before the reboot where everything went awry… I now connect it to my machine and the usb connection is not picked up by my machine. Have I lost my phone?

  13. Espi Nete

    February 7, 2013 at 2:00 am

    can you put the download link for the kdz again ?

  14. otobil

    February 12, 2013 at 11:14 am

    Official Stock Firmware can’t download “File not found”
    Please help my LG E-400 can’t start after flash..

  15. arvin7thn

    February 17, 2013 at 9:33 pm

    its say phone was found in KDZ updater… can you help me please?

  16. Nitish Kumar

    March 12, 2013 at 3:18 pm

    from where i can download stock firmware for lg l3 pl tell me

  17. Nitish Kumar

    March 12, 2013 at 3:18 pm

    pl reply me

  18. Rheyanzki Gia

    March 13, 2013 at 7:03 pm

    yes! my phone also keeps on restarting!!!!

  19. shahrukh

    March 19, 2013 at 8:19 am

    Whenever i do flash after sometime the program stops working… what to do? plz help i’m using windows 7

  20. FortyFive

    March 29, 2013 at 9:06 am

    For everyone with problems unbricking the lg, the phone mode is not DIAG it’s EMERGENCY
    good Luck 😉

  21. Mr.RED

    April 2, 2013 at 10:05 pm

    To Resolve the Keep Restarting Issue turn off phone or remove battery and insert it again then Press And Hold Home + Vol Down + Power Then Release it When It Vibrates it Will Hard Reset And Wait and it Will Reboot and Then Congrats

    • Zisis

      July 26, 2014 at 6:48 pm

      I had exactly that problem, thanks!

  22. mico

    April 21, 2013 at 8:51 am

    if ur fone keeps booting just go to recovery mode vol down + menu+ power button thats how it works guud luck guys

  23. Saroj Dahal

    April 22, 2013 at 4:14 pm

    my phone doesn’t respond usb… nether on pc nor it charges after fashing… help me out

  24. poll

    May 14, 2013 at 3:04 pm

    No detecta el usb, para cargar, ni software pc

  25. sukshith

    December 30, 2013 at 8:57 pm

    send me the link of lg stock firmare..

  26. sukshith

    December 30, 2013 at 8:58 pm

    i have zip file but in kdz updater its not recognizing please help me…

  27. Luis

    September 9, 2014 at 8:06 am

    DONE! At first time (downgrading from Cyanogen Mod9) it was stuck in boot loop and does not go past there – even with the hard reset!! Tried to “flash” the same .kdz the second time, and still boot loop, but this time made hard reset again and… VOILÁ… working! Be patient. Google it… because, from my experience… if the phone still responds to our inputs… is probably “fixable”!!

  28. emmantot

    September 30, 2014 at 9:26 am

    Hi, I followed the steps but KDZ updater showed “Phone not found” error. Can you tell what should I do ?]
    thanks !

  29. emmantot

    September 30, 2014 at 9:37 am

    Hi Team ! Thanks for the tutorial, i was able to unbrick my LG 😀
    by the way…its not DIAG,,, its EMERGENCY 😀
    THANKS !

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