Develop Bugs

fix boot QHSUSB_BULK LG G4 F500

my phone bricked and computer recognize "QHSUSB_BULK".
I use QPST to flash boot for it but no have mpgr and mbn for chip msm8992.
please yous have share for me thanks. sorry my english

Please anyone give us the solution please help some one repair this via usb cable so there was a solution!!!
But how please can anyone help us
Br
Shahzaib Jahangir

darkdevil15101992 said:
my phone bricked and computer recognize "QHSUSB_BULK".
I use QPST to flash boot for it but no have mpgr and mbn for chip msm8992.
please yous have share for me thanks. sorry my english
Click to expand...
Click to collapse
I know on g3 this was considered hard brick had to use wilcrack to reflash bootloader partitions cause the primary gtp is now corrupted for what ever reason g2 and g3 are unbrickable beacause of this i do know u need the tot of the firmware u bricked on have to extract 4 or 5 partitions from said tot. Then flash them to ure phone
Search for g3 hard brick and it can give u a idea just ddont know how compatible it is yet ive done it on g2 and g3 im new to g4
http://forum.xda-developers.com/showthread.php?t=2582142

Ok but on willcracket there was 2nd loader.hex file which was only for msm8974 and 8974AC and our g4 is msm8992 and msm8994
So we badly need msm8992.hex file and rawprogram.xml
And as I see there is some mbn files also sbl1.mbn,sbl1 signed.mbn and more
We need those files for msm8992 please can anyone give us those files so we try it
Br
Shahzaib Jahangir

I got the same problem, my device stops during upgrade and bootloader freeze, I can't enter in download mode, e don't clean in a recovery.
Sometimes it's back, but my win7 64 don't recognize him, few a minutes display off and pc recognized like as qhsusb_bulk!

Night vampire said:
I got the same problem, my device stops during upgrade and bootloader freeze, I can't enter in download mode, e don't clean in a recovery.
Sometimes it's back, but my win7 64 don't recognize him, few a minutes display off and pc recognized like as qhsusb_bulk!
Click to expand...
Click to collapse
Hi, do you have a solution?

manuel1496 said:
Hi, do you have a solution?
Click to expand...
Click to collapse
Bro try board diag

bilawal.sarfraz.1 said:
Bro try board diag
Click to expand...
Click to collapse
What's that?

manuel1496 said:
What's that?
Click to expand...
Click to collapse
Bro tell me first that what your pc is show:
1) QHS_USB BULK 9006.
2) QHS_USB BULK 9008.
TELL ME THAT WHICH TYPE OF DEVICE IS SHOWB IN YOUR PCS DEVICE MANAGER WHEN YOU CONNECT YOUR PHONE WITH PC.

Bricked H815 no bootloader no download modus

Hi,
I got a G4 H815 from a friend. He tried to install a custom firmware and killed the G4.
I see the G4 in the device manager as a qualcomm HS-USB QDloader 9008, but nothing more.
With the LGFlash Tool: It will transfer the files, but after 8 seconds it fails caus of missing download mode.
With LGUP, after I changed the driver to an LG USB COM Port, it connected but at Model: Unknown model. And stopped
I think, I have to install first a bootloader on the device, but how?
Someone can help pls?

midwayhero said:
Hi,
I got a G4 H815 from a friend. He tried to install a custom firmware and killed the G4.
I see the G4 in the device manager as a qualcomm HS-USB QDloader 9008, but nothing more.
With the LGFlash Tool: It will transfer the files, but after 8 seconds it fails caus of missing download modus.
With LGUP, after I changed the driver to an LG USB COM Port, it connected but at Model: Unknown model. And stopped
I think, I have to install first a bootloader on the device, but how?
Someone can help pls?
Click to expand...
Click to collapse
1) Did you put your phone in download mode before using LGUP?
2) You can install custom recovery using adb commands if your bootloader is unlocked.

rlamba said:
1) Did you put your phone in download mode before using LGUP?
2) You can install custom recovery using adb commands if your bootloader is unlocked.
Click to expand...
Click to collapse
The problem is: It´s dead!
no bootloader, no download mode, no recovery...
The phone is clean.
That´s the big issue.
There is one solution I read with a dump/bin file here at xda...
But I don´t know if it is the right file for the 815, it says yes but...
My plan is, to dump a file via SD-Card to activate the download mode. But I need someone who can say to me " Thats the way, and these are the files you need to"

midwayhero said:
The problem is: It´s dead!
no bootloader, no download mode, no recovery...
The phone is clean.
That´s the big issue.
There is one solution I read with a dump/bin file here at xda...
But I don´t know if it is the right file for the 815, it says yes but...
My plan is, to dump a file via SD-Card to activate the download mode. But I need someone who can say to me " Thats the way, and these are the files you need to"
Click to expand...
Click to collapse
Well for H815 we cant assure SD card will work
The only way is via Medusa pro Emmc repair if you need help pm me maybe i may help you[emoji4]

midwayhero said:
The problem is: It´s dead!
no bootloader, no download mode, no recovery...
The phone is clean.
That´s the big issue.
There is one solution I read with a dump/bin file here at xda...
But I don´t know if it is the right file for the 815, it says yes but...
My plan is, to dump a file via SD-Card to activate the download mode. But I need someone who can say to me " Thats the way, and these are the files you need to"
Click to expand...
Click to collapse
Try this dump!
It worked for me

dev8987.tiwari said:
Well for H815 we cant assure SD card will work
The only way is via Medusa pro Emmc repair if you need help pm me maybe i may help you[emoji4]
Click to expand...
Click to collapse
Thanks a lot, I will come back to your offer. Just wanna give the SD-Card solution one chance

-gloim- said:
Try this dump!
It worked for me
Click to expand...
Click to collapse
Thanks, you got a PM

D851 converted to D850 looking for a way back

Hi guys;
So i bought a second hand unlocked D851 ( TMOBILE) with kitkat (cloudy rom) wanted to upgrade it to lolipop but i hard bricked it then used board diag program to bring it back to life but i extracted a d850 rom TOT since the d851 didnt work so now my lg g3 is at&t and permenantly locked ,been trying for a week now to unlocked it for nothing then I read somewhere in this forum that its easy to unlock the d851 using the tmobile app. so is there any way to change it back to D851.

Anyone has any idea?!!

how u use the board diag cuz im stock in qualcomm hs-usb qdloader 9008 and the threadt is closed now

ipus89 said:
how u use the board diag cuz im stock in qualcomm hs-usb qdloader 9008 and the threadt is closed now
Click to expand...
Click to collapse
Try this thread... it is still open & active: https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359

startswithPendswithOOH said:
Try this thread... it is still open & active: https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
Click to expand...
Click to collapse
how about my problem??!!!

nice8man said:
how about my problem??!!!
Click to expand...
Click to collapse
1)What do you mean permanently locked...carrier/sim, mcafee security, something else? If it's carrier you can order a sim unlock code off of ebay for @$4.00 us, or use any other sim unlock services out there.
2)If you changed a d851 to a d850 using board diag and manually loading the partitions - then why not extract a d851 tot and do the same thing?

startswithPendswithOOH said:
1)What do you mean permanently locked...carrier/sim, mcafee security, something else? If it's carrier you can order a sim unlock code off of ebay for @$4.00 us, or use any other sim unlock services out there.
2)If you changed a d851 to a d850 using board diag and manually loading the partitions - then why not extract a d851 tot and do the same thing?
Click to expand...
Click to collapse
thank you for the reply.
1- its carrier unlock + i have no online wallet and i cant get one
2- thats what im looking for is there a way to manually load d851 partitions i mean when i loaded d850 partitions my phone was in dload mode ( hard bricked) do i have to hard unbrick now again?
by the way i can search for other carriers and i find mine under rat:GSM but i m unable to connect to it .

nice8man said:
thank you for the reply.
1- its carrier unlock + i have no online wallet and i cant get one
2- thats what im looking for is there a way to manually load d851 partitions i mean when i loaded d850 partitions my phone was in dload mode ( hard bricked) do i have to hard unbrick now again?
by the way i can search for other carriers and i find mine under rat:GSM but i m unable to connect to it .
Click to expand...
Click to collapse
1) I don't know of a free way to get an unlock code, so if you can't order one you're probably stuck. Pay a friend who can order one for you?
2) If we're on the same page here and you previously used the board diag tool then that should work again. Hard brick usually shows up in your device manager as qualcomm 9008 instead of an lg device, so to get back to that condition you would have to open the phone up and short a pin -
follow the guide in the link I posted before and you should be good to go. I don't have links for any d851 tot files though...sorry, not my variant.

startswithPendswithOOH said:
1) I don't know of a free way to get an unlock code, so if you can't order one you're probably stuck. Pay a friend who can order one for you?
2) If we're on the same page here and you previously used the board diag tool then that should work again. Hard brick usually shows up in your device manager as qualcomm 9008 instead of an lg device, so to get back to that condition you would have to open the phone up and short a pin -
follow the guide in the link I posted before and you should be good to go. I don't have links for any d851 tot files though...sorry, not my variant.
Click to expand...
Click to collapse
so i need to hard brick my phone again?

nice8man said:
so i need to hard brick my phone again?
Click to expand...
Click to collapse
Unfortunately...I think so. If you were to try and use the lg flash tool and try and tot a d851 file into a d850 it'll probably throw some errors - model check, for ex - and won't flash. You can try and see for yourself if you'd like...here's a link for a couple tools; the 1st is kdz method, second is tot: https://forum.xda-developers.com/showthread.php?t=2785089
To brick it again follow guide I linked( https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359), short that 2nd jtag pin in the pic for @5 seconds, plug in the usb, and it should go to qualcomm 9008. You already know how to do the rest as far as loading partitions and such, and if you don't the guide will tell you what to do.
Good luck :good:

startswithPendswithOOH said:
Unfortunately...I think so. If you were to try and use the lg flash tool and try and tot a d851 file into a d850 it'll probably throw some errors - model check, for ex - and won't flash. You can try and see for yourself if you'd like...here's a link for a couple tools; the 1st is kdz method, second is tot: https://forum.xda-developers.com/showthread.php?t=2785089
To brick it again follow guide I linked( https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359), short that 2nd jtag pin in the pic for @5 seconds, plug in the usb, and it should go to qualcomm 9008. You already know how to do the rest as far as loading partitions and such, and if you don't the guide will tell you what to do.
Good luck :good:
Click to expand...
Click to collapse
the link you attached is for mobiles that are already hard bricked mine is not

nice8man said:
the link you attached is for mobiles that are already hard bricked mine is not
Click to expand...
Click to collapse
Yeah....and?
Re-read your previous post where you asked if you'll have to brick it again.
I said yes, and gave you a link on how to do it. Did you read the link? My guess would be no, since the 1st 4 steps tell you how to brick it and enter qualcomm9008 mode.
You're on your own now. Good luck. And you're welcome for the time I spent trying to help you.

startswithPendswithOOH said:
Yeah....and?
Re-read your previous post where you asked if you'll have to brick it again.
I said yes, and gave you a link on how to do it. Did you read the link? My guess would be no, since the 1st 4 steps tell you how to brick it and enter qualcomm9008 mode.
You're on your own now. Good luck. And you're welcome for the time I spent trying to help you.
Click to expand...
Click to collapse
Thank you for your replies man i really appriciate it...i have read that topic like 5 times; maybe i dont understand english very well but when i read the title LG G3 Hard Brick Recovery+ Required Materials:Bricked LG G3 i thought he meant that this topic is for people that has thier phone bricked and need to recover them.

nice8man said:
Thank you for your replies man i really appriciate it...i have read that topic like 5 times; maybe i dont understand english very well but when i read the title LG G3 Hard Brick Recovery+ Required Materials:Bricked LG G3 i thought he meant that this topic is for people that has thier phone bricked and need to recover them.
Click to expand...
Click to collapse
It's cool. Yes the guide is for already bricked phones, but what I was trying to say is since you have a functional phone rt now you're gonna have to brick it, and by brick it I mean qualcomm9008 mode, and that's what the 1st part of the guide shows you how to do by shorting out the pin. Once you get to Qualcomm mode you can then use the board diag tool and load your partitions that you extracted from the tot and hopefully get back to your original d851 phone and get back up and running. Does that make more sense?
Again...good luck

startswithPendswithOOH said:
It's cool. Yes the guide is for already bricked phones, but what I was trying to say is since you have a functional phone rt now you're gonna have to brick it, and by brick it I mean qualcomm9008 mode, and that's what the 1st part of the guide shows you how to do by shorting out the pin. Once you get to Qualcomm mode you can then use the board diag tool and load your partitions that you extracted from the tot and hopefully get back to your original d851 phone and get back up and running. Does that make more sense?
Again...good luck
Click to expand...
Click to collapse
I did not know that you can hard brick the phone by shorting the pins; thank you.

startswithPendswithOOH said:
It's cool. Yes the guide is for already bricked phones, but what I was trying to say is since you have a functional phone rt now you're gonna have to brick it, and by brick it I mean qualcomm9008 mode, and that's what the 1st part of the guide shows you how to do by shorting out the pin. Once you get to Qualcomm mode you can then use the board diag tool and load your partitions that you extracted from the tot and hopefully get back to your original d851 phone and get back up and running. Does that make more sense?
Again...good luck
Click to expand...
Click to collapse
I hard bricked it again and then extracted another D851 tot and then loaded all the necessary partitions but the phone still on qload mode i copied the sbl1.mbm of the D850 and tried them with D851 partitions the phone revived but not in download mode.
I managed tp recover all partitions and the phone is on dowloading mode but still detected as d850 so i have the dll cross error everytime i try to flash a rom even with using the custon dll file.

Hard Un-Brick chance H815? My story

Dear all, my quick story overwiev:
I have G4 H815 10H
Heat sink upgrade due to bootloop was done week ago and was ok
Wanted make software update to Nougat from 5.1 Lolipop and then some problems comes out
For this puprose wanted gain Root access, so
went through out https://forum.xda-developers.com/g4...t-tmo-vzw-intl-variants-soon-root-lg-t3164765 , but with 1 mistake, I've download T-Mobile H811 10H Version instead of H815 version and run
dd if=/data/media/0/system.rooted.H81110h.img bs=8192 seek=65536 count=548352 of=/dev/block/mmcblk0
After this got Security error #11
So went to Stock Frimware flashing KDZ procedure https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
I've decided to flash Europe General H81510B_00.kdz file
but..... now this phone doesn't boot. I can see only Qualcomm hs-usb qdloader 9008 in my device manager.
I know that some of you guys (@TheMadScientist @steadfasterX) are able to unbrick this, really please help.

krzakx said:
Dear all, my quick story overwiev:
I have G4 H815 10H
Heat sink upgrade due to bootloop was done week ago and was ok
went through out https://forum.xda-developers.com/g4...t-tmo-vzw-intl-variants-soon-root-lg-t3164765 , but with 1 mistake, I've download T-Mobile H811 10H Version instead of H815 version and run
dd if=/data/media/0/system.rooted.H81110h.img bs=8192 seek=65536 count=548352 of=/dev/block/mmcblk0
So went to Stock Frimware flashing KDZ procedure https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848
I've decided to flash Europe General H81510B_00.kdz file
but..... now this phone doesn't boot. I can see only Qualcomm hs-usb qdloader 9008 in my device manager.
I know that some of you guys (@TheMadScientist @steadfasterX) are able to unbrick this, really please help.
Click to expand...
Click to collapse
Well.. You have corrupted the partition table as you used the wrong seek value. The procedure there is EXTREMELY risky and that's one reason why.
You need qfil in that mode. Download this file:
http://droid.binbash.it:8008/unbricking/qfil/h815/G4-h815_fullunbrick_working_7a3ae5809224d.zip
Install qpst and the drivers file from the software folder and after that start qfil. Select the prog_emmc_firehose file from the flashing folder in qfil and select the rawprogramm0 and patch0 file before clicking download.
After succeeded try download mode again and flash any h815 kdz again.
If that doesn't work you either have to wait until I'm back from vacation or find someone else with a box (e.g. infinity) to fix the gpt.
Sent from my LG-H815 using XDA Labs

steadfasterX thanks for your effort! Going to try it morning.
By the meantime maybe @TheMadScientist can say something from his experience?
How about SD card unbricking method https://forum.xda-developers.com/g4/help/unbrick-lg-g4-h811-9008-qualcomm-t3456417
I've tried once but it dosen't work.
Thanks in advance.

krzakx said:
steadfasterX thanks for your effort! Going to try it morning.
By the meantime maybe @TheMadScientist can say something from his experience?
How about SD card unbricking method https://forum.xda-developers.com/g4/help/unbrick-lg-g4-h811-9008-qualcomm-t3456417
I've tried once but it dosen't work.
Thanks in advance.
Click to expand...
Click to collapse
Guys I just studied it I ever actually had to unbrick mine. I studied in help for others so I don't know how much help I would exactly be

krzakx said:
steadfasterX thanks for your effort! Going to try it morning.
By the meantime maybe @TheMadScientist can say something from his experience?
How about SD card unbricking method https://forum.xda-developers.com/g4/help/unbrick-lg-g4-h811-9008-qualcomm-t3456417
I've tried once but it dosen't work.
Thanks in advance.
Click to expand...
Click to collapse
Yes that way is possible too. The only way it worked for me is by using dd to flash the gpt to the external sdcard and then flashing the bootloader stack plus laf. Quite easy if you have some Linux experience. But if not... you need a proper guide..
maybe there is a working h815 image out there as well but the one you're referring to is for the h811.... OMG you haven't used that one did you??? H811 has ARB!!! If you don't know what that means read https://bit.do/antirollg4 and ASK before using files not related to your model.
I'm very interested what SALT would tell us about your ARB once the device is working again....
Sent from my LG-H815 using XDA Labs

I have some base linux experience, (Debian) so no "handle follow guide" would be needed.
Yes, I have used H811 file, that was my mistake . I've exactly used this file http://downloads.codefi.re/thecubed/lg_g4/lef/h81110h.tar.gz from this topic https://forum.xda-developers.com/g4...t-tmo-vzw-intl-variants-soon-root-lg-t3164765 ,
Dear steadfasterX , please take one more time overlook for my situation and think about wright steps. Waiting for yours advices.
Best regards.

krzakx said:
I have some base linux experience, (Debian) so no "handle follow guide" would be needed.
Yes, I have used H811 file, that was my mistake . I've exactly used this file http://downloads.codefi.re/thecubed/lg_g4/lef/h81110h.tar.gz from this topic https://forum.xda-developers.com/g4...t-tmo-vzw-intl-variants-soon-root-lg-t3164765 ,
Dear steadfasterX , please take one more time overlook for my situation and think about wright steps. Waiting for yours advices.
Best regards.
Click to expand...
Click to collapse
No I was talking about the sdcard files. Flashing the h811 system file will not increase ARB (as said you corrupted the gpt though) but when you flash the h811(which you linked in your second post!) files to write the sdcard and then trying to boot from the sdcard it very likely will increase the ARB.
Ok so you haven't used the sdcard method yet?
Then try that one:
https://forum.xda-developers.com/g4/development/unbrick-lg-g4-h815-9008-qualcomm-t3452853
Again try to boot to download mode with that and flash a h815 kdz. You MAY have luck but it depends. Give it a try.
Sent from my LG-H815 using XDA Labs

krzakx said:
Dear all, my quick story overwiev:
Click to expand...
Click to collapse
In the photo of your phone in download mode, it identifies as an LG-H810 running H81010o.
If I may ask, where did you get this phone from?

terence.tan said:
In the photo of your phone in download mode, it identifies as an LG-H810 running H81010o.
If I may ask, where did you get this phone from?
Click to expand...
Click to collapse
Dear @terence.tan you've asked good question.
So phone is from China seller, additionally I've made some photos of motherboard and got confused as you can see there VS986_MAIN_1.0 oh no... is all so mixed up.
Unfortunately do not have system.img back up eh.... stupid me.
SD Card method doesn't work.
Now I am think if I should go this method
https://forum.xda-developers.com/g4/help/lg-g4-vs986-super-hard-brick-unbrick-fw-t3666784
it's only idea because my motherboard seems to be VS968 labeled, but let me ask you guys as specialists.
Waiting for answer. Thanks.

One more question regarding SD Card method guys,
I've just prepared SD card fallowing this topic https://forum.xda-developers.com/g4/development/unbrick-lg-g4-h815-9008-qualcomm-t3452853 , but it doesn't work.
Just for confirmation here you can se parted print, can you check please If I've burned SD Card image properly?
https://hastebin.com/inimikipux.sql
Thanks

Hi there! So you have a phone with a VS986 main board, which identifies as an H810, which was sold to you as an H815. (Which you have flashed with H811 software.)
The seller of your phone in China has done something strange to make this all work, we don't know what.
I'm sure you will understand, it will be very difficult for anyone to tell you exactly what to do.
The sdcard unbrick you tried didn't work because it has the boot stack files for H815, which require a phone with ARB version 0. I suspect you will need to copy either the VS986 or H810 boot stack files to your sdcard for it to work. (I don't know which, only the seller knows...)
However trying alternate boot stacks has a chance to increment your ARB; you should consider the consequences and not use anything with a high ARB before trying lower ones...

steadfasterX said:
Well.. You have corrupted the partition table as you used the wrong seek value. The procedure there is EXTREMELY risky and that's one reason why.
You need qfil in that mode. Download this file:
http://droid.binbash.it:8008/unbricking/qfil/h815/G4-h815_fullunbrick_working_7a3ae5809224d.zip
Install qpst and the drivers file from the software folder and after that start qfil. Select the prog_emmc_firehose file from the flashing folder in qfil and select the rawprogramm0 and patch0 file before clicking download.
After succeeded try download mode again and flash any h815 kdz again.
If that doesn't work you either have to wait until I'm back from vacation or find someone else with a box (e.g. infinity) to fix the gpt.
Sent from my LG-H815 using XDA Labs
Click to expand...
Click to collapse
I'm literally praying to the Android Gods that this works. If it doesn't then I am truly truly lost...
Wish me luck!

Ugh!
I get this...
Sending NOP
ReadFile last error: 0
Response is NULL
NOP: Fail Code: 14
Unable to send FireHose NOP. Device is not in FireHose mode!
Download Fail:FireHose Fail FireHose Fail: Failed to send FireHose NOP to the phone.
Finish Download
Man, This LG is kicking my ass!
Any suggestions?

donniegalaxy2 said:
Ugh!
I get this...
Sending NOP
ReadFile last error: 0
Response is NULL
NOP: Fail Code: 14
Unable to send FireHose NOP. Device is not in FireHose mode!
Download Fail:FireHose Fail FireHose Fail: Failed to send FireHose NOP to the phone.
Finish Download
Man, This LG is kicking my ass!
Any suggestions?
Click to expand...
Click to collapse
Having just these problems on qfil with my h815 did you found a solution?

sr.arenisca said:
Having just these problems on qfil with my h815 did you found a solution?
Click to expand...
Click to collapse
No solution found by me!!! I gave up and sold the phone to ecoATM!

How to proceed with "Frankenstein" LG G4 phone?

first of all - great job steadfasterX and cWks! with unlocking LG G4
probably I bought (in China) "Frankenstein" LG G4 phone, because it should be H810, but on mainboard is written VS986. I have unlocked it by SALT and instaled TWRP, but I have not find any ROM which would work
based on the information from the vendor it should have V10o ATT firmawe, but in the LG software it shows that is model H815 with firmware V29a.
subsequently I brick it and unbrick it a try to fash .tot files using LG software, but unsuccessful. Because the LGUp shows, that it is model LS991 finally I flash the LS991ZVD.tot file. during booting, the android will stop, when "configuring your phone", probably LS991 files have wrong modem...
now works the download mode and recovery mode only for this phone (no fastboot) and in SALT shows that is ARB4 which is not possible to unlock
Is there any possibility to:
1. to flash correct modem (possibly for VS986?) - 1.a) how is possible to modify the modem in tot file?
2. erase eMMC or go back to ARB2?
I have the backup prepared in TWRP with ARB2, but how us it to recover the phone?
Many, many, many thanks for help!
Or it is easier to buy in Chine the new motherboard? and which?
Thank you very much for answers!!!

Dedulo said:
first of all - great job steadfasterX and cWks! with unlocking LG G4
probably I bought (in China) "Frankenstein" LG G4 phone, because it should be H810, but on mainboard is written VS986. I have unlocked it by SALT and instaled TWRP, but I have not find any ROM which would work
based on the information from the vendor it should have V10o ATT firmawe, but in the LG software it shows that is model H815 with firmware V29a.
subsequently I brick it and unbrick it a try to fash .tot files using LG software, but unsuccessful. Because the LGUp shows, that it is model LS991 finally I flash the LS991ZVD.tot file. during booting, the android will stop, when "configuring your phone", probably LS991 files have wrong modem...
now works the download mode and recovery mode only for this phone (no fastboot) and in SALT shows that is ARB4 which is not possible to unlock
Is there any possibility to:
1. to flash correct modem (possibly for VS986?) - 1.a) how is possible to modify the modem in tot file?
2. erase eMMC or go back to ARB2?
I have the backup prepared in TWRP with ARB2, but how us it to recover the phone?
Many, many, many thanks for help!
Or it is easier to buy in Chine the new motherboard? and which?
Thank you very much for answers!!!
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Click to collapse
Ok well first of all read my signature about the anti roll back details. It is absolutely impossible to flash lower ARB . That's for what it is made for obviously .
Next is that you have flashed stupid files and besides they're with an arb higher than 2 so you cannot unlock it anymore.
we all know that Frankenstein devices are special in many terms .
one example is nobody knows what they do or flash in the primary boot loader which we cannot read out. That means we don't know which RAM is compatible and we do not know if they make any modifications in the signed boot loader stack which ensure they can load Frankenstein devices.
So even if you flash for example h810 files with an arb of 4 it may not load or working properly the same goes for vs 986 of course .
yeah and I have to repeat myself but flashing that arb of 4 was bad in another way,too. Having that arb you have no way to use qfil anymore as that works only up to arb 3. So you have no way to use it to flash for example other models image files or even more important to unbrick your device if it ever hard bricks.
You can of course use a text editor to modify any kdz file and flash whatever you like .. The other option is to use the SD card unbrick method linked in my signature but it requires to hard brick your device first. I can tell you how but in your situation it is very risky if you can't get the SD card unbrick working . so I would recommend to go the Hex editor way just search XDA for how to use it and flash vs986 files with an ARB of 4
Sent from my OnePlus 6T using XDA Labs

steadfasterX said:
Ok well first of all read my signature about the anti roll back details. It is absolutely impossible to flash lower ARB . That's for what it is made for obviously .
Next is that you have flashed stupid files and besides they're with an arb higher than 2 so you cannot unlock it anymore.
we all know that Frankenstein devices are special in many terms .
one example is nobody knows what they do or flash in the primary boot loader which we cannot read out. That means we don't know which RAM is compatible and we do not know if they make any modifications in the signed boot loader stack which ensure they can load Frankenstein devices.
So even if you flash for example h810 files with an arb of 4 it may not load or working properly the same goes for vs 986 of course .
yeah and I have to repeat myself but flashing that arb of 4 was bad in another way,too. Having that arb you have no way to use qfil anymore as that works only up to arb 3. So you have no way to use it to flash for example other models image files or even more important to unbrick your device if it ever hard bricks.
You can of course use a text editor to modify any kdz file and flash whatever you like .. The other option is to use the SD card unbrick method linked in my signature but it requires to hard brick your device first. I can tell you how but in your situation it is very risky if you can't get the SD card unbrick working . so I would recommend to go the Hex editor way just search XDA for how to use it and flash vs986 files with an ARB of 4
Sent from my OnePlus 6T using XDA Labs
Click to expand...
Click to collapse
You are right. I have done some stupid steps, because the method for unlocking my "Frankenstein" phone did not work. I read about the anti roll back, but I hoped that something had changed (also the unlocking process has gradually developed )
I had to take apart the phone first and find out what was written on the motherboard This was a big mistake!
Today I have bricked (hard?) my phone by flashing LS991 ZVB ARB3 tot file, because I don't know, how to work with Hex editor.
Which KDZ file I need to download for SD card unbrick? I suppose that VS986 with ARB4, right?
Thanks for a help and reply!

Dedulo said:
You are right. I have done some stupid steps, because the method for unlocking my "Frankenstein" phone did not work. I read about the anti roll back, but I hoped that something had changed (also the unlocking process has gradually developed )
I had to take apart the phone first and find out what was written on the motherboard This was a big mistake!
Today I have bricked (hard?) my phone by flashing LS991 ZVB ARB3 tot file, because I don't know, how to work with Hex editor.
Which KDZ file I need to download for SD card unbrick? I suppose that VS986 with ARB4, right?
Thanks for a help and reply!
Click to expand...
Click to collapse
well I see. the ARB is (as written in the linked guide) a (extreme likely) physical blown fuse, so a process which can not be reverted..
yes you hard-bricked the phone by flashing a lower ARB then the current one. once you flashed ARB 4 you can't flash ARB lower then 4.
the good is as you have hard-bricked it you may be able to use the sdcard unbrick but that requires the 9008 qdl mode:
connect the device to your PC and view the device manager. does it add something like QHUSB BULK? If yes use the vs986 files + UsU files as written the sdcard thread.
You can also use FWUL from booting on USB and just type: lsusb in a terminal after connecting the phone. paste the output here then. It should show something like "QDL 9008" or "QualComm...". If thats the case use the vs986 files + UsU files as written in the sdcard thread.
If both of the above does not show up the QDL 9008 mode.. well try it without battery in again. If it still failing it is likely gone. sorry. The QFIL files available do not work with ARB >3 so.
You can still read on in the sdcard unbrick thread in the second post to find out how to force the sdcard unbrick mode (that differs from the the QDL mode and so need to disassembling the whole mainboard and doing tricky stuff without a guarantee of that it work at the end.)
.-

steadfasterX said:
well I see. the ARB is (as written in the linked guide) a (extreme likely) physical blown fuse, so a process which can not be reverted..
yes you hard-bricked the phone by flashing a lower ARB then the current one. once you flashed ARB 4 you can't flash ARB lower then 4.
the good is as you have hard-bricked it you may be able to use the sdcard unbrick but that requires the 9008 qdl mode:
connect the device to your PC and view the device manager. does it add something like QHUSB BULK? If yes use the vs986 files + UsU files as written the sdcard thread.
You can also use FWUL from booting on USB and just type: lsusb in a terminal after connecting the phone. paste the output here then. It should show something like "QDL 9008" or "QualComm...". If thats the case use the vs986 files + UsU files as written in the sdcard thread.
If both of the above does not show up the QDL 9008 mode.. well try it without battery in again. If it still failing it is likely gone. sorry. The QFIL files available do not work with ARB >3 so.
You can still read on in the sdcard unbrick thread in the second post to find out how to force the sdcard unbrick mode (that differs from the the QDL mode and so need to disassembling the whole mainboard and doing tricky stuff without a guarantee of that it work at the end.)
.-
Click to expand...
Click to collapse
Yes, Q HS-USB QDLoader 9008 is in the Ports (in DevMan), but now I need to prepare SD card, because the old files (which I have used for unbricking last time) do not work .

Dedulo said:
Yes, Q HS-USB QDLoader 9008 is in the Ports (in DevMan), but now I need to prepare SD card, because the old files (which I have used for unbricking last time) do not work .
Click to expand...
Click to collapse
sure. you need ARB 4 files.
.-

Dedulo said:
Yes, Q HS-USB QDLoader 9008 is in the Ports (in DevMan), but now I need to prepare SD card, because the old files (which I have used for unbricking last time) do not work .
Click to expand...
Click to collapse
I don´t find the right kdz for VS986 with ARB4. Can I use yours? (these two with ARB2: http://leech.binbash.it:8008/stock/LG/vs986/2BA/)

Dedulo said:
I don´t find the right kdz for VS986 with ARB4. Can I use yours? (these two with ARB2: http://leech.binbash.it:8008/stock/LG/vs986/2BA/)
Click to expand...
Click to collapse
well you still do not read my linked guide or understand what ARB is, right? Its IMPOSSIBLE to use an ARB lower then 4 in your case. so NO you can NOT use these.
Well I assumed there would be firmware with ARB 4 for the vs986 but it seems the highest is ARB 2..
keep in mind: everything you do now is extremely risky with maybe no point of return! If it bricks and is not switching to the 9008 mode.. you are lost!
After looking around a bit including in my ARB thread (which I mentioned) the LS991 seems to be the only one with ARB higher then 3 (so 4).
you are stuck with LS991 now. that means even when you may be able to unbrick with the sdcard unbrick it means you may never get cell service.
so try a LS991 kdz with ARB 4 (ZVD as you flashed that one should be fine) for the unbrick files to bring it at least back to life.
.-

steadfasterX said:
well you still do not read my linked guide or understand what ARB is, right? Its IMPOSSIBLE to use an ARB lower then 4 in your case. so NO you can NOT use these.
Well I assumed there would be firmware with ARB 4 for the vs986 but it seems the highest is ARB 2..
keep in mind: everything you do now is extremely risky with maybe no point of return! If it bricks and is not switching to the 9008 mode.. you are lost!
After looking around a bit including in my ARB thread (which I mentioned) the LS991 seems to be the only one with ARB higher then 3 (so 4).
you are stuck with LS991 now. that means even when you may be able to unbrick with the sdcard unbrick it means you may never get cell service.
so try a LS991 kdz with ARB 4 (ZVD as you flashed that one should be fine) for the unbrick files to bring it at least back to life.
.-
Click to expand...
Click to collapse
OK, so we understood each other. Because I flashed wrong file LS991 ZVD, I can't go back - only to the same firmware (because of ARB etc.). There is no way to change it (to VS986) or flash anything else
and, if I will be lucky, then the phone comes back to point during booting, when it stops in "configuring your phone". Never use him anymore for call services? How to go through this (configuration)?
There is only one way - to buy in Chine the new motherboard, but which (H815)?

Dedulo said:
OK, so we understood each other. Because I flashed wrong file LS991 ZVD, I can't go back - only to the same firmware (because of ARB etc.). There is no way to change it (to VS986) or flash anything else
and, if I will be lucky, then the phone comes back to point during booting, when it stops in "configuring your phone". Never use him anymore for call services? How to go through this (configuration)?
There is only one way - to buy in Chine the new motherboard, but which (H815)?
Click to expand...
Click to collapse
buy a h811 one as you can unlock h811 within just fastboot.
if you can't get one: the h815 international (so no h815p, h815tr etc) as it can be unlocked officially by the LG website.
if you can't get one: any h815 model should be fine as you can unlock by UsU and I haven't heard any big issues here.
good luck
.-

steadfasterX said:
buy a h811 one as you can unlock h811 within just fastboot.
if you can't get one: the h815 international (so no h815p, h815tr etc) as it can be unlocked officially by the LG website.
if you can't get one: any h815 model should be fine as you can unlock by UsU and I haven't heard any big issues here.
good luck
.-
Click to expand...
Click to collapse
I will try to unbrict it first and we will see... maybee I will wait for motherboard. this will be ok?
https://www.aliexpress.com/item/For...pm=a2g0s.13010208.99999999.259.88b93c00XlwucM
or is there any issue?
thank you very much for your time and help!

Dedulo said:
I will try to unbrict it first and we will see... maybee I will wait for motherboard. this will be ok?
https://www.aliexpress.com/item/For...pm=a2g0s.13010208.99999999.259.88b93c00XlwucM
or is there any issue?
thank you very much for your time and help!
Click to expand...
Click to collapse
I cannot guide you in where to buy or if that one is valid sorry.
.-

steadfasterX said:
I cannot guide you in where to buy or if that one is valid sorry.
.-
Click to expand...
Click to collapse
OK, I understand.
Could you be so kind and send me a link for kdz file? I don't find it. I have only LS991 ZVD tot file. It is possible to convert it to kdz?
Thank you!

I have prepared the SD card from tot file (not bin but img files) except PrimaryGPT.gpt (I don't fin it in tot file, only the PrimaryGPT_0.bin from another KDZ).
The proper KDZ for LS991 ZVD I could not download from LG support site, because my FR phone has IMEI VS986.
Until now the SD card unbricking method doesn't work for me.
I will try LS991 ZVB, which I used for bricking the phone.
Any idea what to do?