How To Flash LG G3 Dual-LTE D858 Firmware File

LG G3 Dual-LTE D858 Firmware File

This specific firmware download package for LG G3 Dual-LTE D858 comes with a Stock ROM of LG G3 Dual-LTE D858. This helps you to bypass the FRP lock and revert from root and custom ROM.

Why would you want to flash Firmware on your LG G3 Dual-LTE D858?

Suppose your LG G3 Dual-LTE D858 device is corrupt or bricked. Download the LG G3 Dual-LTE D858 firmware from here. (based on your device model number) and flash it on your smartphone or tablet. To get it back to working condition again.

LG G3 Dual-LTE D858 Firmware” is the software that is provided by the vendor, or You may say that the software. Which was installed by the manufacturer of the phone, is LG G3 Dual-LTE D858 Stock Rom.


The Benefit Of Stock ROM:

  • Flash Stock ROM to unbrick your LG G3 Dual-LTE D858
  • Fix boot loop issue
  • Update and Downgrade
  • Unroot or Fix Bugs
  • To solve the lag or stutter
  • Fix software issues.
  • Revert to stock firmware

LG G3 Dual-LTE D858 Stock ROM Details:

  • Gapps: Included
  • Device Supported: LG G3 Dual-LTE D858
  • Tool Supported: LG Flash Tool 2014 And LGUP Tool
  • Os Ver:



D856 10B_00.kdz

D858 HK 10d.tot


LG G3 Dual-LTE Official Firmware Android 5.0 Lollipop Kdz And tot:-

D857 20D

D858 HK 20C and 20D



D856 20A_00.kdz

LG G3 Dual-LTE Official Firmware Android 6.0 Marshmallow Kdz:-

D858 HK30a000202.kdz

D856 30B000521.kdz


Pre-requirements to Install LG G3 Dual-LTE D858 Stock ROM:

  • Supported Phone: LG G3 Dual-LTE D858
  • Charge your mobile: You may no less than a half charge.
  • Laptop or PC: To execute this installation, you must use a PC or Laptop.

Take LG G3 Dual-LTE D858 Full Backup

Before going to install LG G3 Dual-LTE D858 stock ROM, you need to take a backup of all your messages, photos, and apps from your smartphone.

Most smartphones automatically make a backup in the background. But to make sure you take everything to your new device, you need a full backup.
Most smartphones back up automatically in the background in case of incidents. To ensure a complete transition to your new device, a full backup is necessary.

Download LG G3 Dual-LTE D858 Flash Tool And Drivers:

A. Download and install LG G3 Dual-LTE D858 Drivers—the necessary communication between your device and PC.

These drivers are mainly for the devices powered by LG. With these drivers, you can transfer files, flash the firmware files on the device, etc.


B. We use the LGUP Tool 2016 and LG Flash Tool 2014 as LG G3 Dual-LTE D858 Flash Tool because this tool is very efficient and support all kind of LG phones.

Instructions to Flash LG G3 Dual-LTE D858 Stock ROM:

1. Extract/Unzip the LG G3 Dual-LTE D858 flash file that you downloaded above on your PC. You’ll get a bunch of files required to run the program.

2. Run the LG flash tool 2014.exe file to Open the LG flash tool. If it doesn’t open, install Visual C++ Runtime Library from here and then try again.

3. Boot your LG G3 Dual-LTE D858 device into Download Mode:


How To Start LG G3 Dual-LTE D858 download mode?

Power off your LG device

Press and hold the Volume Up button.

Connect your device to your PC with a USB cable while holding the Volume Up button.

4. Now load the LG G3 Dual-LTE D858 firmware. kdz file into the LG Flash Tool window on your pc.


5. Click the browse button at the end of the “Select LG G3 Dual-LTE D858 firmware. kdz file” line. Leave every other option as is on the LG Flash Tool window.

6. Once you’ve selected LG G3 Dual-LTE D858 firmware. kdz, click the CSE Flash button to proceed on flashing the.KDZ firmware to your LG device.

7. Normal Flash” button doesn’t wipe data, and the “CSE Flash” button wipes data. If you’re upgrading from stock firmware, then “Normal Flash” might do.

9. You’ll get a “Read Phone Information” window; it will be blank for the most part. Just hit the START button to proceed.


10. Now, you’ll see the “Select Country & Language” window. Select “Different” from the country list and then “English” from the language list.

And remember NOT to tick the Smartphone upgrade checkbox; it’s for Windows Mobile phones, not your LG device running on Android.

You’ll see a progress bar now. Just wait until it’s 100%, after which you might get an error “Connection to server failed.” This is okay. Don’t disconnect your phone at this point.

LG G3 Dual-LTE D858 firmware updates progress on your phone. Once it’s complete, your phone will automatically reboot.


After the flashing process starts, and might take up to 5-10 minutes, so keep patience and wait.

Instructions To Flash LG G3 Dual-LTE D858 With LGUP Firmware Tool:

1. Download and install LG Mobile Driver 4.1.1

2. Download the Latest LGUP Tool 2016

3. Download LGUP DLL


5. First, Install the DLL file, then install the LG UP file on your PC.

6. Run the LG UP tool on your PC.

7. Connect your LG smartphone to your PC/laptop.

8. LG G3 Dual-LTE D858 will be listed on the screen of the LG UP tool.


9. Now click on the Upgrade option in LG UP and choose the file’s path. Locate the LG G3 Dual-LTE D858 firmware KDZ file and select it.

10. Click on the start button, and the process will be started.

11. Once the process is completed, your phone will restart.

Unplug your device; done!!!


You have successfully Installed the Stock Firmware on your LG device.


  • Read and understand the Full Guide before flashing.”LG G3 Dual-LTE D858 Firmware”.
  • Use these instructions at your own risk. We will not be responsible for everything that happens to your device resulting from the use of information in this guide.
  • Before flashing, Stock ROM on LG G3 Dual-LTE D858 must have a 70–80% charge.


Comments are closed.