Unlock LG Optimus L9 Bootloader Running Jelly Bean & Flash CWM Image

Posted by & filed under Optimus L9.

The LG Optimus L9 is a high end device of the L-series smartphones from LG.  When the LG Optimus L9 came into the market, it had Ice Cream Sandwich running in it and had an unlocked bootloader because of which developers could not run unsigned boot images on the phone. However, LG promised a Jelly Bean update for this device and it is out now. I assume you would have updated your device to Jelly Bean by now.

With the latest Jelly Bean update on Optimus L9, the bootloader becomes unlockable and it is pretty easy for you to unlock the bootloader of the device using a simple ADB command. Let us see how.

While we are pretty sure that you won’t lose any data with this, we still recommend you to backup everything on your phone using our backup guide.

Please note that unlocking the bootloader of your device voids the warranty of your device. We are not responsible for any damage your device might face by following this tutorial.

Step to Unlock LG Optimus L9 Bootloader

  1. You need to have ADB files in your P C to run the commands that follow. You can get them here.
  2. Make sure you have enough charge on the device.
  3. Make sure your device has a SIM inserted and let it stay on with the SIM at least for 30 minutes,
  4. Go to Settings>Developer options and enable USB Debugging.
  5. Connect your device to the PC via USB cable.
  6. Open the Android folder where you have the ADB files. Shift + Right click in an empty space in the folder and select “Open Command Prompt here”.
  7. Run the command
    adb reboot oem-unlock
  8. You will see a confirmation screen as given below. Follow the instructions you see on the screen.
    IMG 20130313 223349 Unlock LG Optimus L9 Bootloader Running Jelly Bean & Flash CWM Image
  9. If your device is unlocked, your device will be in fastboot mode.
  10. Stay in fastboot mode and download CWM recovery file and place it in the Android folder.IMG 20130313 223412 Unlock LG Optimus L9 Bootloader Running Jelly Bean & Flash CWM Image
  11. Run the command
    fastboot flash recovery recovery-clockwork-6.0.2.9-p760.img
  12. This will flash CWM to your phone.
    IMG 20130313 223530 Unlock LG Optimus L9 Bootloader Running Jelly Bean & Flash CWM Image
  • Penci

    after I unlocked the bootload I cant flash the CWM its saiz that waiting for the device. I gues it doesnt recognize it. is there any driver to install it so my win8 to recognize it and I gues after that i could install the CWM.
    Thank for your post the unlocking method is clear and i could do it at the first trie

    • Lalit Indoria

      You just need to install the device drivers of LG. Maybe an anti virus program is interrupting the connection!

  • anup

    im getting a command write failed error when executing the “fastboot flash recovery recovery-clockwork-6.0.2.9-p760.img” command … :( .. any idea on wat this error is …

    • Lalit Indoria

      What do you see when you type “fastboot devices” command?

      • anup

        fastboot devices returns following message:
        “???????? fastboot”

        • Lalit Indoria

          Do you have the ADB files on your PC?

  • anup

    yeahhhh .. obviously i do have that ….

  • Sanjeev

    i did wait 30 mins. after typing adb reboot oem-unlock , it just boots again back normally….. plz do help

  • dragz

    Does this work on lg optimus l5 too running in jellybean? Your answer is very important. Thanks.

    • Lalit Indoria

      No, it doesn’t.

  • mohitwn

    After the 11th step it doesn’t boot into cwm mode..help

  • john smith

    it rebooted normally after I try adb reboot oem-unlock

    • GermanUser

      I have the same problem…

  • chandru

    After the 11th step it doesn’t boot into cwm mode..help