How to Flash Stock ROM with LG Flash Tool (Tested Method)

If you want to flash an LG smartphone and need a complete tutorial about how to flash stock ROM with the LG flash tool, then you are in the right place. This post will share every detail of flashing .kdz and .cab firmware of your device using the LG flash tool. If your LG smartphone or tablet is dead or bricked and you need to flash the stock firmware, this tutorial is for you. We have discussed all details in steps for your convenience.

After using the LG smartphone for a long time, the users may encounter severe issues like brick or dead phone. To solve this issue, you need to download the latest LG firmware and the flash tool. Then you can follow the tutorial below that will help you flash the ROM quickly. As you know, flashing stock firmware means installing a new ROM on your LG device. When you flash the ROM, the stock firmware along with all data and files will be deleted. So you should back up all files and data before flashing. Let’s check out how to flash the LG smartphone using the LG flash tool.

How to Flash LG Stock ROM Using LG Flash Tool

Flashing LG device is an advanced task for technicians and developers. You need to flash the stock ROM when you have any critical issue. The LG device is supposed to be updated automatically. However, if your LG firmware is not updated and supports the update, you need to upgrade it by flashing the stock firmware manually. We will share the complete tutorial on how you can flash any LG Android device using LG Flash Tool from this post.


  • A Windows PC
  • LG USB Driver
  • A USB Cable
  • LG smartphone and tablet
  • Model-specific flash file or stock firmware
  • LG Flash Tool

Points to Remember

  • Read each step carefully and follow the instructions.
  • Backup all files from the device because the flash will remove all your data.
  • The battery should charge a 40%-60% minimum.
  • This tutorial works with the .kdz and .cab format firmware only.

Steps to Flash LG Device using LG Flash Tool

Step 1: Download Firmware Based on your LG Smartphone Model

To flash your LG device, you will need the latest firmware. First, you need to download the official flash file for your device to start the flashing process. Each LG handset has individual stock firmware. Also, each model has multiple firmware files based on locations and countries. We have published many Stock Firmware files for various handset models. So browse our Stock Firmware category and download the latest flash file on your computer.

Step 2: Extract the Flash File

After downloading the firmware file, you will get a zip file. So using any file extractor, unzip the folder on your PC, and you will see various files. Check and remember these file locations because you will need them later.

Step 3: Download and Install LG USB Driver

A USB driver is an all-in-one software program for Windows PC that allows desktop computers to detect the connected device. However, you must install the correct USB driver. If you want to connect an LG powered phone to a PC, you will need to download and install the LG PC Suite or LG USB driver corresponding to the device models. Luckily, we have listed all available USB drivers for LG phones based on models.

Step 4: Install the LG Flash Tool

The LG Flash Tool is our favourite tool when we recommend flashing the stock ROM of LG smartphone and tablet. The user interface is easy for everyone. We have posted about LG Flash Tool on our site. Download LG Flash tool latest version and extract the zip file. After extracting, you will get the setup file that looks like LGflash_tool.exe. Now double click on the setup file and install it by following the on-screen instructions.

Step 5: Put your LG Device in Download Mode and connect to the PC

Switch off your LG phone and press power + volume down + home to enter download mode. However, a few older phones use a different button combination. After entering your device to download mode, connect the device to the PC using a USB data cable.

Step 6: Launch LG Flash Tool

After installing the LG flash tool and connecting the device to the PC, double click on the flash tool, and open it.

Step 7: Load the stock ROM Files from Firmware Folder

From the dashboard, under the “Select Type” drop-down option, select “CDMA.” Then click on the “Folder” icon on the “Select KDZ file” option. Now, locate the stock firmware file you have downloaded and extracted. The firmware is kdz format. After choosing the firmware file, click on the “Open” option.

Step 7: Flash the Stock ROM

After uploading the KDZ firmware, click on the “Normal Flash” button. Then the “Read Phone Information” windows appear. From this box, click on the “Start” button below.

Step 8: Choose Country and Language

After click on the start option, a small window will show the country and language. Now, choose your country and language from the drop-down box. Then click on the “OK” button.

Step 9: Start the Flashing Process

Now, the stock ROM flashing will begin automatically. The whole flashing process usually takes 10-15 minutes, depending on the speed, and your device will take a few extra minutes to reboot. After rebooting the device, you will see the custom ROM is running. However, after installing the new firmware, you cannot go back to the old firmware. When the flashing is completed, a green tick mark will show up on the screen.

Step 8: Close the Flash Tool and Disconnect the LG Device

When you see the green tick mark, you are done. Using this simple tool, you have completed flashing the device accurately. Now close the flash tool on your Windows desktop and disconnect the smartphone.

Warning: As you have already known that flashing requires expertise to perform the process correctly. If anything goes wrong, you may brick your device. Also, flashing wipes out everything from the phone. So before flashing or rooting the device, take a full backup. Also, we recommend knowing everything steps you are making. However, if you brick the device using this tool, will not be responsible for your action.

These are the complete steps to flash any Android smartphone powered by LG using LG Flash Tool. If you have any issues, please comment below, and we will try to resolve your issue.

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