[LG Optimus L90] Lazgeor:
Hello everyone, I have some good news! I found a way to unbrick the device in case you flashed the wrong boot loader and your device is hard bricked. I found this tutorial in another post, so I'll include a link to that, but I'll also paste the solution here. This tutorial is not mine, but it worked and now I have my device back. However, my IMEI is 0 and I get some weird Warning when I boot my device. But even with IMEI 0 my service still works and that Warning is nothing important. So, here's the tutorial:

We need

1) LOADER.IMG LG L90-D410 or LG L90-D405 (Just to add something here, my phone is the d405n but because I couldn't find a file for it, I used the d405 and it worked. The phone now thinks it's the 405 model but NFC still appears and works fine.)

2) DiskImageRev2.exe

3) Hard Disk Low Level Format Tool

Download everything from here

1) Connect phone to computer

2) Install the program to format the Hard Disk Low Level Format Too Then run it

3) Format the phone, do not forget to put a tick in formatting PERFORM QWICK WIPE

4) Do not remove the phone from the PC

5) Go to My computer, there you will see a flash drive, click on it and format the default means of WINDOWS

6) Run the program to record the image IMG DiskImageRev2

7) Specify the path to the downloaded and extract the image LOADER.IMG

8) Indicate a formatted disk drive letter

9) Next, check the box on the MB5 HASH press WRITE, further confirm the action

10) Remove battery, wire, wait 5 sec., Insert the battery, hold the volume button "+" and connect the USB

12) Your phone starts to DOWNLOADER

13) Download D410 .kdz file and flash it via LGMobile Flash Tool

After you've done all that, then you can go to the post which says Unbrick Phone, Relock Bootloader and other stuff and fllow that tutorial in order to flash your stock ROM back. I'll have another post below this with all the links. I hope I helped you! Just remember that because of the IMEI 0 you might not be able to use you device for phone and sms cause the service provider may block you and I don't know how to fix that problem.

---------- Post added at 02:04 PM ---------- Previous post was at 01:58 PM ----------

Here's the link to the Original post: http://xdaforums.com/lg-l90/help/bricked-d410-t3094018

Here's the link to download the stuff neded: https://www.androidfilehost.com/?w=files&flid=32938

Here's the link to use after you're done with the first tutorial:

http://xdaforums.com/lg-l90/general/guide-flash-stock-kdz-offline-lg-l90-t2803479

---------- Post added at 02:07 PM ---------- Previous post was at 02:04 PM ----------

If anyone has any further questions , don't hesitate to ask! I'll be glad to help you :) best of luck on fixing you device, and also I know that this might not the the best solution (cause of the IMEI 0 and stuff but it worked for me so I hope it works for you too!)

---------- Post added at 02:10 PM ---------- Previous post was at 02:07 PM ----------

And something that I forgot to add, this solution works for those who get the Qualcomm HS-USB QDLoader 9008 on the device manager on their computers. This is what I was getting too and this tutorial worked.