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 FRP lock and revert form root and custom ROM.

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

If your LG G3 Dual-LTE D858 device is corrupt or bricked. Download 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 a 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 LG G3 Dual-LTE D858 Stock ROM:

  • Flash Stock ROM to unbrick your LG G3 Dual-LTE D858
  • Flash Stock ROM to solve the boot loop issue
  • Update and Downgrade
  • Unroot or Fix Bugs on the phone
  • To solve the lag or stutter
  • By flashing Stock ROM, you can fix software issues.
  • Revert to stock to get your warranty.

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.

How To Backup Android Phone Before Flashing Stock Firmware

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 for as LG G3 Dual-LTE D858 Flash Tool because of 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 LG flash tool 2014.exe file to Open 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 PC with a USB cable while holding the Volume Up button.

4. Now load the LG G3 Dual-LTE D858 firmware.kdz file into 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 a 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 update 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 Latest LGUP Tool 2016

3. Download LGUP DLL

5. First Install the DLL file, then install 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.


  • Please 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.