[LG Optimus L90] gdjindal:
First of all, This is not my original work. All credits goes to :cowboy:quangnhut123:cowboy:, who modified this tool for us. I am just sharing this GUIDE for easy flashing KZD to L90

DEVICES FLASHED WITH THIS GUIDE AND TESTED OK: LG L90 (D410)

1. Download KDZ file

To download KZD for you Device GOTO http://lg-phone-firmware.com/index.php?firmware=1

Enter IMEI no of your device.

Enter IMEI Number of your LG Device and press Download Button. It will generate a download link for kdz file.

Be warned the KDZ that your going to use will be auto deleted (may be not) so make another copy

2. Precautions:-

Please temporarily disable any Adblock add-on in your browser and I recommend to check your host file

C:Windows\system32\drivers\etc\host

Enable Show Hidden Files in Folder Option (Don't disable this option until kdz flashing process completes) and Delete the LG Mobile Tool folder (if exist) from

C:\ProgramData\

Remove all other USB devices (external HDD, backup drives, other phones, etc.) and cables connected to PC to avoid issued due to voltage loss.

OFFLINE KDZ FLASHING DOES NOT LOOSE PHONE DATA, BUT YOU MUST BACKUP YOUR PHONE IN ANY CASE.

3. Downloads:-

Download zip file attached below.

4. Install LG Drivers (internet required for this):

Extract B2CAppSetup.zip anywhere on PC and Run B2CAppSetup.exe as administrator. Accept Agreement and a window will appear. Click on OK button (Bottom Right) on instructions. Now connect your LG Device to PC in LG Software mode. B2CAppSetup tool will detect it. Now Click on Install USB Drivers (2nd option on Top Left). It will automatically download and install drivers for your device. If Install USB Drivers options goes grey (Disable) after detecting phone, it means latest USB Drivers are already installed.

After installing USB Drivers please REBOOT YOU PC

Now Connect Phone in Software Upgrade Mode: Switch OFF the phone and Press VolumeUP button and insert USB cable into the phone, Now phone should show Firmware Upgrade Mode.

Let windows load any drivers, wait until it finishes. TWO ENTRIES SHOULD APPEAR IN DEVICE MANAGER IF DRIVERS ARE PROPERLY INSTALLED

After installing device drivers unplug the phone from PC

5. Starting The Installation Process:

Extract LG Flash Tool 2014.zip to C:\ drove of PC.

Open LG Flash Tool 2014 folder and run LGFlashTool2014.exe and administrator.

LG Flash Tool 2014 windows will appear.

Select "3GQCT" in Type of Flash.

Select "EMERGENCY" for PhoneMode.

Select your KDZ file in the Select KDZ File box.

Press "Normal Flash" button. (as pic below)

IMPORTANT: Do not change the names of the KDZ files. (They should look like.... "D41010a_00.kdz" or other version in same style.)

Now "Read Phone Information" box will open with blank information, Just press "Start"

Now "Select country and language" small box will open. Here select "Different Country" and "English" and press "OK"

The utility starts the official LG Mobile Support Tool

After a few seconds a screen will appear saying "The phone is disconnected from PC.". Do not click on any button.

Now again connect phone in Software Upgrade Mode: Switch OFF the phone and Press Volume UP button and insert USB cable into the phone, Now phone should show Firmware Upgrade Mode and click retry button.

Now actual flashing will start, and if your KDZ file is good flashing will end without any issue.

JUST RELAX!! SIT BACK WITH HANDS FOLDED BEHIND HEAD AND WATCH IT HAPPENING.

When it finishes full flashing and phone will start rebooting.

YOU CAN REMOVE CABLE AFTER 100%, AND FLASHING IS FINISHED!!! Close all programs.