LG G6 H873 unbrick help needed - LG G6 Questions and Answers

Hi ..
recently i flash Pie 9 H330b on H873i it give error when reach to system ..so i Partition dl and uncheck System partiion and Check all partition it flash .. after that i reboot phone and it gone into dark ..so i shortPin it and it was now in QDloader 9008 mode ..
i use Qfil and follow one of the tutorial on XDA , it flash using Qfil but my phone was still show no sign on screen adn no blinking LED ...
so how can i get download mode from Qdloader ???
Note : My G6 was H871 AT&T and i converted to H873 it work so i tried flashing Pie which brick it ....
So anyone has working Firehose and Raw[rogram.xml and Patch0.xml to load correct partiton and flash that .. becoz i use files on xda but that didnot load Partiton windows to select from ...may be tose file not work on my phone ??

Bricked LG G6 H871 [email protected] (Expert Help)
Hello i bricked my LG G6 H871 [email protected] version . I flashed to H873 canada version for oreo update and updated successfully .But after that i tried again to H873 pie update via FOTA upgrade(LG UP) Now my phone not booting up:(:(:( . But now LGUP...
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ps sorry for my bad english
I CANT USE UPPERCUT BECAUSE OF NEW UPDATE OF MY FIRMWARE AND CANT DO ANYTHING JUST LGUP ITSELF . BECAUSE I DONT HAVE ACCESS ON BOOTLOADER AND FASTBOOT

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