How to Unlock Bootloader on LG Optimus 4X HD

In this article we will tell you how to unlock bootloader on LG Optimus 4X HD. Here are the complete details.

LG Optimus 4X HD is one of the best phones launched by LG. It Contains 1 GHz Dual-core processor with 1 GB RAM, Android 4.0.4 Ice Cream Sandwich, 5MP Rear and VGA Front camera, and many more exciting features.

Android Bootloader

Bootloader is a sort of programming code that must be executed just before any OS begin to run. Every Android-based Smartphone has its own kind of Bootloader that orders and instructs its OS kernel to boot routinely or we can say ‘Normal Booting’.

But it should be noted here that since an Android is an open source operating system and is bundled with an array of different hardware, therefore we find different classes of bootloader on different kinds of hardware.

Although android is an open source operating system, still you will find a locked bootloader on the device. This is due to the reason that the device manufacturers want to keep the user on their particular Android OS version exclusively designed for that device.

They would not like to see the user playing around with their OS’s security. When someone desires to flash the Custom ROM of his device for installing another Custom ROM, then his first step is to unlock the bootloader of the device.


This tutorial will definitely work when unlocking the bootloader of LG Optimus 4X HD only. While working on it for latest android versions is not yet confirmed. On applying this update to another model or device may give an unwanted result.

Due to the unlocking of Bootloader, your Android device may lose its official Warranty and while applying this update we will not be responsible if anything occurs to your device, so continue at your own risk. Just follow the simple steps given below.

LG Optimus 4x HD


  1. For successful completion of this rooting process charge your phone up to a minimum of 75% battery.
  2. You must take a back-up of all your personal items and other important data.
  3. Please ensure that all your security suites, like a firewall and antivirus, on your LG Optimus 4X HD as well as on the computer must be disabled.
  4. You must enable USB Debugging mode on your LG Optimus 4X HD. Just follow, Settings–>Applications–>Development–>USB debugging. There select the USB Debugging icon.

Steps to be followed to unlock bootloader of LG Optimus 4X HD:

Step 1:

First install USB drivers of LG Optimus 4X HD.

Step 2:

Download Unlock4XHD.

Step 3:

Connect your LG Optimus 4X HD to your PC in debugging mode, to do this drag the notification bar down and you’ll get the option of USB connected, click on it and you’ll get the USB Debugging option.

Step 4:

Now extract the downloaded files in C: drive.

Step 5:

After complete extraction of files, open a file naming Flash_Bootloader.bat.

Step 6:

After this your LG Optimus 4X HD will automatically boot to installation mode.

Step 7:

Now open the file naming Flash_Recovery.bat.

Step 8:

Now after some time, recovery files will be installed in your LG Optimus 4X HD and your LG Optimus 4X HD will reboot by itself.

Step 9:

At last, open the file naming Reboot2Recovery.bat to open the CWM in your LG Optimus 4X HD.

So you’ve successfully unlocked the bootloader of your LG Optimus 4X HD.

Hope this article about how to unlock bootloader on LG Optimus 4X HD helped you.




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Prashant Sharma

Prashant Sharma is a Delhi based Entrepreneur who spent most of his college days polishing his marketing skills and went for his first business venture at 19. Having tasted failure in his entrepreneurial debut, he turned a Tech-enthusiast, specializing in web technologies later. Join him on Google Plus

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