[Android] OsFreakxx:
First of all, This is not entirly my original work. credits goes to :cowboy: quangnhut123 :cowboy: , who modified LG Flash tool for us. I am just sharing this GUIDE for flashing lolipop to L90

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I have tested this method myself and it is working perfectly for me, but it is also possible that it might not work for you for some reasons, so don't panic, just post your problem or whatever error you are facing (please attach screenshot if possible). I or other thread members will try to troubleshoot it. After resolving the problem I'll update this post, so that other members do not face such problem again.

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PLEASE, USE THIS TUTORIAL AT YOUR OWN RISK, IF SOMETHING WENT WRONG (because of your stupidity) ME OR XDA WILL NOT RESPONSIBLE FOR YOUR LOSS.

Flashing KDZ file removes Root and CWM, so you will need to root again.

Flashing KDZ file does not wipe your data, but if you get bootloops you need to hard-reset it, so please backup data first.

Note -

EVERYTHING IN THIS ROM IS WORKING Even the Knock Code , Camera ,DOuble Tap, ANd Everything Your DEvice Is Capable Of.

If Due To Some Reason Your Device Slows Down After The Update Please Do A Factory Reset Of the Device It Will Work Fine Again With Lolipop. :good:

1. Download KDZ file

To download KDZ File Of Lolipop for you Device GOTO

https://yadi.sk/d/PRPkYggqf4v4C For lolipop 5.0.2

https://yadi.sk/d/2OoNsU3wf5vku For lolipop 5.0.0

2. Precautions:-

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 The Zip File From Here- http://www.mediafire.com/download/s2qqa3p464pbxp7/LG_Flash_Tool_2014.zip

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

Download File From Here- http://www.mediafire.com/download/3ir140wxq9mxa31/B2CAppSetup.zip

[IMG="Device Manager Look For Drivers Ignore if dont know how to open"]https://cdn-images.xda-developers.com/direct/3/0/3/4/6/4/4/Device_mange.jpg[/IMG]

After installing device drivers unplug the phone from PC

5. Starting The Installation Process:

Extract LG Flash Tool 2014.zip to A Folder

Note-

Copy The KDZ file to the same folder where all the files of lg Flash Tool 2014 is extracted- [For Better Results]

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.... "D41020B_00.kdz" )

Now Again 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.

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

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.

DON'T FORGET TO HIT THANKS IF IT HELPED...