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By Daniel Cross — Android Firmware Specialist | Updated April 2025
What Is LG Flash Tool?
LG Flash Tool is a free Windows utility for flashing stock KDZ and TOT firmware files onto LG Android smartphones. It is used to unbrick devices, downgrade firmware, and restore factory software. Compatible with all LG models from 2013 to 2021 and works on Windows 7 through Windows 11.
LG Flash Tool is the official firmware flashing utility developed for LG Android smartphones and tablets. It allows you to flash stock KDZ and TOT firmware files directly onto your LG device using a Windows PC. Whether you need to unbrick a non-booting device, downgrade to a previous firmware version, restore factory software after a failed root, or install a clean stock ROM, LG Flash Tool is the go-to solution for LG device owners and developers worldwide. yogadns license key work
The tool has been the standard flashing solution for LG devices since 2013 and remains the most reliable way to manage LG firmware. Unlike third-party utilities, LG Flash Tool is designed specifically for LG's KDZ firmware format, ensuring compatibility and reliability across the full range of LG Android hardware. : Pro users can define and resolve through
For newer LG models (G6, V30, and beyond), LG released a companion tool called LGUP Tool, which handles TOT firmware files. Both tools are available free from this site and are fully supported on Windows 10 and Windows 11. Common Issues and Security Warnings You can purchase
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: Pro users can define and resolve through multiple DNS servers and pools simultaneously based on advanced hostname masks. Official Pricing and Licensing Options
: Official licenses are typically lifetime licenses , covering all minor updates (e.g., from version 1.00 to 1.99). Why You Need a Pro License Key
: Businesses can receive up to 40% off for bulk purchases. Common Issues and Security Warnings
You can purchase legitimate keys directly from the YogaDNS Pricing Page .
: Approximately $69.95 USD , covering up to 5 computers for non-commercial use within one household.
: This is perhaps the most sought-after Pro feature. It allows YogaDNS to run automatically in the background before a user even logs in.
: Approximately $39.95 USD for a single user/multiple computers or multiple users/single computer.
While a "Basic" version exists for free, several critical features are locked behind the Pro license:
: If the YogaDNS Service fails to start after 31 days, it is usually because the license has expired or the key was not registered for "All users".
Download LG Flash Tool
LG Flash Tool is the only ROM flashing utility specially designed for LG Android smartphones and devices. The latest version works with KDZ files larger than 1GB. Download the right tool for your device below.
LG Flash Tool 2.0.2.5 (Latest)
Windows 10 / 11
Download
LGUP Tool
For newer LG phones — Windows 10 / 11
Download
LG USB Driver
Required — All Windows versions
Get Driver
Requirements Before You Flash
- A Windows computer (Windows 7, 8, 10, or 11) to run the application.
- LG USB drivers installed on your PC before connecting the device.
- The correct KDZ firmware file for your exact LG device model and region.
- The Megalock.dll file placed in the LG Flash Tool installation directory (for some versions).
- A working USB data cable compatible with your LG smartphone.
- At least 70% battery charge on your LG device before starting.
Important: Copy the downloaded KDZ file into the extracted folder of the tool before starting, or save it in an easily accessible location such as the desktop. The tool needs to locate the firmware file to begin the flash process.
: Pro users can define and resolve through multiple DNS servers and pools simultaneously based on advanced hostname masks. Official Pricing and Licensing Options
: Official licenses are typically lifetime licenses , covering all minor updates (e.g., from version 1.00 to 1.99). Why You Need a Pro License Key
: Businesses can receive up to 40% off for bulk purchases. Common Issues and Security Warnings
You can purchase legitimate keys directly from the YogaDNS Pricing Page .
: Approximately $69.95 USD , covering up to 5 computers for non-commercial use within one household.
: This is perhaps the most sought-after Pro feature. It allows YogaDNS to run automatically in the background before a user even logs in.
: Approximately $39.95 USD for a single user/multiple computers or multiple users/single computer.
While a "Basic" version exists for free, several critical features are locked behind the Pro license:
: If the YogaDNS Service fails to start after 31 days, it is usually because the license has expired or the key was not registered for "All users".
Compatible LG Devices
LG Flash Tool supports the full range of LG Android smartphones and tablets, including devices with the following chipsets:
| Chipset / Platform | Firmware Format | Recommended Tool |
|---|
| Qualcomm Snapdragon (2013–2016) | KDZ | LG Flash Tool |
| Qualcomm Snapdragon (2017+) | TOT / KDZ | LGUP Tool |
| MediaTek (IM, BIN) | KDZ / BIN | LG Flash Tool |
| CDMA Smartphones | KDZ | LG Flash Tool |
| Infineon | KDZ | LG Flash Tool |
| LG G2, G3, G4, G5 | KDZ | LG Flash Tool |
| LG G6, V20, V30, G7, V40 | TOT | LGUP Tool |
| LG K-series, Q-series, X-series | KDZ / TOT | LG Flash Tool or LGUP |
Not sure which tool to use? If your device was released before 2017, use LG Flash Tool with a KDZ file. If your device is from 2017 or later, use
LGUP Tool with a TOT file. Still unsure? Check our
troubleshooting page for model-specific guidance.
Troubleshooting Tips
If you experience problems running LG Flash Tool, the following fixes resolve the most common issues. For a full troubleshooting reference, visit our dedicated troubleshooting guide.
- If the tool fails to launch, install the Visual C++ runtime library from Microsoft and try again.
- If the tool reports that the phone is disconnected, disconnect from USB 3.0 and reconnect to a USB 2.0 port.
- If the application does not perform correctly, verify that the downloaded LG Flash Tool version is compatible with your device model.
- Enable USB debugging in Developer Options before booting into download mode.
- Ensure the KDZ file you downloaded matches your device's exact build number and region code.
- For LGUP users: install
LGUP_8994_DLL_Ver_0_0_3_23 first, then install LGUP_Install_Ver_1_14_3 to avoid tool misbehavior.
- If LGUP shows "Unknown Device", remove and reinsert the battery (where applicable) rather than using the power button.
- Select "Normal Flash" to replace firmware without losing data, or "CSE Flash" to wipe and restore only boot files.