NOTE: Before we begin, let me tell you that from my experience the D851 does not require shorting at all. it will be identified as Qualcomm HS-USB in a brick state without any opening up, check your device manager!
Hello guys, I spent 2 weeks analyzing hex files in order to revive a D851 that I got my hands on. It was not an easy journey but I would like to share this with the devs or people who are looking at bring their bricks to life.
What I did was actually hack the Sahara programmer files that WillCracker (BoardDiag) programs use. This comes in the attached files. Seems like there was no site on the Internet sharing this unique files and thus not allowing us to unrbick the D851.
For a more detailed view of how I got these modified files created please look at this post
But with this uniquely created files we now have unbrickable D851's , I have revived one D851 phone that I had dead. Right now it already booted into download mode and it is loading the *.tot.
Instructions
Connect your D851 phone without battery via USB to a Windows Box.
Make sure you have installed the HS USB 9008 Drivers installed. If so you will find something called "Qualcomm HS-USB QDLoader 9008 (COMxx)" under device manager, make sure you check the COM Port number, as you will need this later on the next step.
Open up BoardDiag.exe (from the downloaded files here, as it includes modified files specific for D851) and select: B2 (MSM8974AC), and pick up your COM Port.
Under 'Image Extraction' select your bin which should be the *.tot file (I used LG_D851.10C_TOT&DLL.7z).
Hit the 'extract' button into a directory of your choice.
Pick under 'COM Port' the 'Target Dir' and select where you have extracted the *.tot. This will allow us to start flashing the partition files.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Select on the checkbox "AP check".
Check the box called "RESTORE BOOT IMG", in here start picking up the partitions, write each one of them (not system, userdata or cache -- those are worthless for now), and ONLY in the end flash LAF and then finally SBL*. After this you will see the phone boot up with the battery icon since you do not have a battery connected. This is when you can tell you have now the bootloader reflashed.
Unplug the USB cable, insert the battery into the phone and hold UP while hooking up the USB cable again. After doing this your phone will boot up in download mode and now you can go ahead and flash the correct firmware using a tool such as LGFlashTool.
Below you can see a screenshot of the dmesg showing that it is already in download mode (after being in QC HS USB 9008 mode)... I am so !"#$ happy
I flashed the partitions like in this other guide but please use the attached file or else it won't work.
NOTE: Do download the attached Willcracker Version I attached specific for the D851, this is a modified one and is the only type of program I managed to use to revive my phone. I cannot stop insisting that any other set of files will not work on our D851, which is what most people reported on the forums for some time.
EXTRA: Disable Windows driver update, updating the Qualcomm HS-USB driver can cause conflicts and problems on the process.
<< If you like my work here is my hat, please donate! >>
hello please i ask for your help
thank you for the great work man
can you please help me in my phone has same problem now it is a month
the problem is that my phone is lg f460s
i have the tot file but because it is a different chip-set Apq8084 this app BoardDiag doesn't support it
can you please modify the app
i searched in so many Korean forums nothing there and Russian forums too
please i donate for you man if you could find .hex singleimage.bin
i gave my phone to some people here but all of them doesn't know how to solve this boot loader problem i knew it can be fixed only by medusa box or octubos box which no body have it here
i found some files which it can revive some other phones having the same processor qualcomm snapdragon 805 like Motorola turbo and nexus 6
like these images
these unbrick files can communicate with lg f460s but because it need a right singleimage and .hex files it cant fix it
please bro try to look for this model i tried for so many weeks now
and thank you again
it fully work
thank u so much
i found your port last night
and it isnt have instruction
so i do by my self with your tool
you are my hero , you saved me thank you sooo much bro , my phone booted in fastboot mode after this , i ll try to flash frimeware now , biiig thnaks to you man
Jyed said:
you are my hero , you saved me thank you sooo much bro , my phone booted in fastboot mode after this , i ll try to flash frimeware now , biiig thnaks to you man
Click to expand...
Click to collapse
No problem man. I am also so glad to have unrbicked that phone as I can now give it to my dad as his phone (a really old Samsung Galaxy S3 was dying of slowness). I hated to have a ~$200.00 brick :cyclops: not being used! And I am a big fan of this LG G3 phone.
Btw, what I did after unrbciking first after fastboot started was that I shutted down my phone by removing the battery, and disconnected the USB cable. Then I reinsrted the battery and put it in download mode by using the: 'Keep pressing up and insert the USB cable'... and after that re-flashed the *.tot using downloaded mode as it is way faster with LGFlashTool.
Amazing work man… my D851 is working now. Earlier it failed to boot in all other methods. Thank u so much
@Omar-Avelar , Man, today i've seen my pm box and checked your message and looked here, nothing to say just.
THANKS, YOU SAVED ME! THANKS A LOT.
I've set the phone in download mode now, but when it begin the d851 firmware flash says cross DL SWversion, thats because i have a frankenstain phone, thats what've caused me a brick, what i need to do to set the d851 firmware?
Look at the images
ERROR:
My phone in dload mode says that:
and my motherboard:
I suposse that it can be fixed, but what i need to do?.
THANKS AGAIN MASTER! IM SO HAPPY
Where can i donate to you? Sorry for my english haha.
Edit: i've saw your firm now i'll donate you.
adrianbravom said:
@Omar-Avelar , Man, today i've seen my pm box and checked your message and looked here, nothing to say just.
THANKS, YOU SAVED ME! THANKS A LOT.
I've set the phone in download mode now, but when it begin the d851 firmware flash says cross DL SWversion, thats because i have a frankenstain phone, thats what've caused me a brick, what i need to do to set the d851 firmware?
I suposse that it can be fixed, but what i need to do?.
THANKS AGAIN MASTER! IM SO HAPPY
Where can i donate to you? Sorry for my english haha.
Edit: i've saw your firm now i'll donate you.
Click to expand...
Click to collapse
I've faced the same fate as you because I flashed a D855 on a Phone that was a refurbished D851. Took me like a month to figure out how to unbrick it.
By the looks of it it seems that your phone still has the LAF partition of the D855 but you recovered the other bootloder partition files allowing you to boot into the download mode 'thinking' it is a D855.
I suggest you use the LGUP_8974.dll instead of the 'supposed' D851 *.dll in the *.tot files... I think that will flash the partitions regardless if it is a D855 or 851 and force enter the files.
Omar-Avelar said:
I've faced the same fate as you because I flashed a D855 on a Phone that was a refurbished D851. Took me like a month to figure out how to unbrick it.
By the looks of it it seems that your phone still has the LAF partition of the D855 but you recovered the other bootloder partition files allowing you to boot into the download mode 'thinking' it is a D855.
I suggest you use the LGUP_8974.dll instead of the 'supposed' D851 *.dll in the *.tot files... I think that will flash the partitions regardless if it is a D855 or 851 and force enter the files.
Click to expand...
Click to collapse
Well, that images posted before whas with lgup_8974.dll and gives me the errors, I think I need to modify the hex file to put it as a "d855" and makes the program recognizes it, me fear is that if I flash the d851 firmware maybe I can loose the imei a mobile information ( before the brick the phone has d855 software ) or it will not erase my efs partition ? What u recommend me ? Flash d855 or d851 tot?
adrianbravom said:
Well, that images posted before whas with lgup_8974.dll and gives me the errors, I think I need to modify the hex file to put it as a "d855" and makes the program recognizes it, me fear is that if I flash the d851 firmware maybe I can loose the imei a mobile information ( before the brick the phone has d855 software ) or it will not erase my efs partition ? What u recommend me ? Flash d855 or d851 tot?
Click to expand...
Click to collapse
If it is a D851 motherboard but seen as a D855 via firmware I would try using the *.dll of D855 and the *.tot file of D851.
Seems like while being in HS-USB 9008 mode one of the partitions was not flashed correctly and the downloader mode still sees it as D855. The other option would be to brick it again with D855 *.dll and *.tot if the first try does not work. And while being in HS-USB 9008 mode please make sure you do flash most of the partitions there (not system, nor userdata, not cache) but the rest and end up with LAF > SBL* partition. That will flash the correct *.tot files for D851 and hopefully you will see the D851 now as D851 in the downloader mode.
I believe IIRC that the LAF partition has the downloader, and that's the one I believe is still written from when you overwrote it as a D855. If you wrote SBL* before LAF it might have booted with the LAF partition of the D855.
All done! Phone works and is alive!, @Omar-Avelar i've did what i told you, i've used a hex editor in a linux distro and modified the first "D851" mention to "D855" and goodbye CrossDL error, flashed sucessly, now my phone it's a real D851 and its hardunbricked! thanks all to you, you are great!.
Thank you, sir. You are live saver.
I have bricked my phone (d851) and I had been looking for days and nothing works.
Fortunately, I went to this thread and had successfully unbrick my phone.
God bless you.
D851 unbrickable
Omar-Avelar said:
I've faced the same fate as you because I flashed a D855 on a Phone that was a refurbished D851. Took me like a month to figure out how to unbrick it.
By the looks of it it seems that your phone still has the LAF partition of the D855 but you recovered the other bootloder partition files allowing you to boot into the download mode 'thinking' it is a D855.
I suggest you use the LGUP_8974.dll instead of the 'supposed' D851 *.dll in the *.tot files... I think that will flash the partitions regardless if it is a D855 or 851 and force enter the files.
Click to expand...
Click to collapse
My case is almost similar. As per software info it was d855 before bricking. So I flashed mm kdz for d855 and bricked.then I opened the cover and found this has a d851 board. So ,as per this tutorial I flashed everything for d851.phone booted but booting into fastboot mode only no download mode. Then I followed some other tutorial and again flashed laf. Img .now it can enter in download mode. But have a big problem .As it was a real d851 rom it cant connect to 3g net work here in india(2g ok). Now I am so disappointed because such a good phone with 2g only.....
But how initially d855 rom was flashed on d851 board???? There may be a way..
Ofcourse only beacuse of thread my g3 is live now. Please help me to get full out put from that.
There are threads to manually add bands to qualcomm device.Can I go for that?
[Update; Duplicated post]
justinmartin111 said:
My case is almost similar. As per software info it was d855 before bricking. So I flashed mm kdz for d855 and bricked.then I opened the cover and found this has a d851 board. So ,as per this tutorial I flashed everything for d851.phone booted but booting into fastboot mode only no download mode. Then I followed some other tutorial and again flashed laf. Img .now it can enter in download mode. But have a big problem .As it was a real d851 rom it cant connect to 3g net work here in india(2g ok). Now I am so disappointed because such a good phone with 2g only.....
But how initially d855 rom was flashed on d851 board???? There may be a way..
Ofcourse only beacuse of thread my g3 is live now. Please help me to get full out put from that.
There are threads to manually add bands to qualcomm device.Can I go for that?
Click to expand...
Click to collapse
Yes, it is such a great feeling to be able to bring the phone back from the death.
BTW, I do believe also the phone bands can be changed using QPST since I have seen Argentinian D855 phones changed to D855P (Adding another LTE band).
You might need another phone reference (LG G3 that worka on the band you want) and using QPST might let you modify some specifics.
Go ahead and Google translate this post for analysis: http://www.grupoandroid.com/topic/112493-guia-habilitar-bandas-lte-para-argentina-en-d855-int/
Another success in reviving the dead lg g3
Omar-Avelar said:
NOTE: Do download the attached Willcracker Version I attached specific for the D851, this is a modified one and is the only type of program I managed to use to revive my phone. I cannot stop insisting that any other set of files will not work on our D851, which is what most people reported on the forums for some time.
Click to expand...
Click to collapse
Thank your thread was really helpful in getting somewhere, You are the champion :good::victory:
---------- Post added at 07:53 AM ---------- Previous post was at 07:52 AM ----------
adrianbravom said:
All done! Phone works and is alive!, @Omar-Avelar i've did what i told you, i've used a hex editor in a linux distro and modified the first "D851" mention to "D855" and goodbye CrossDL error, flashed sucessly, now my phone it's a real D851 and its hardunbricked! thanks all to you, you are great!.
Click to expand...
Click to collapse
Can you please direct me somewhere or guide by yourself on how to do this.
Hey , could anyone help me? i have a lg l40 d175f, and i have boarddiag ,the kdz files but i do not have the partition.txt, what do I have to do??? please save me, this is not a monster phone but i don't have money to buy another one
Omar-Avelar said:
[*]Open up BoardDiag.exe (from the downloaded files here, as it includes modified files specific for D851) and select: B2 (MSM8974AC), and pick up your COM Port.
Click to expand...
Click to collapse
Modified Files huh??
The miracle file is a file that has been around all along. It can be found in the Smartboot Diag Tool. Its called LGD851_ATMO_TMUS.mbn.
All you have to do is rename this file to 2nd_loader.hex and put it inside the Board DIag Tool > Model > B2(MSM8974AC) Folder. Replace this file with the old one.
Now start Board Diag tool and load and decompress your tot file, and flash away.
For other models, you could try renaming your devices mbn from the Smartboot Diag tool to 2nd_loader.hex
wow
mickeyasamoah said:
Modified Files huh??
The miracle file is a file that has been around all along. It can be found in the Smartboot Diag Tool. Its called LGD851_ATMO_TMUS.mbn.
All you have to do is rename this file to 2nd_loader.hex and put it inside the Board DIag Tool > Model > B2(MSM8974AC) Folder. Replace this file with the old one.
Now start Board Diag tool and load and decompress your tot file, and flash away.
For other models, you could try renaming your devices mbn from the Smartboot Diag tool to 2nd_loader.hex
Click to expand...
Click to collapse
can you provide same file for lg g3 f460s ? it has chipset apq8084 . thank you i advance
ExtraDemo said:
can you provide same file for lg g3 f460s ? it has chipset apq8084 . thank you i advance
Click to expand...
Click to collapse
I am currently in class. Will check when I get home.
It has taken me many days to find a tool to flash KDZ AND TOT since many people show an error at 4% of FlashTool and there is no solution so this is your Post.
LGUP is a tool used by Lg for phones that still have a guarantee such as a system error or a software error.
Compatible with Windows vista/7/8/10 No macOS No Linux
Thanks to DroidTH for giving me a link
ok let's start
Renember: All will be erased in the internal memory.
Your warrantly is now avoid
Visit [How-to] Flash firmware KDZ G2 G3 G4 by LGUP On Youtube to the link
Remember that it is not channel advertising, it's just that I can not add external links
Steps to follow
Make sure you have the drivers installed correctly
Download The KDZ / TOT
Connect Lg g3 to pc (No need to enter download mode manually)
Unzip (LGUP-G2-G3.ZIP)
First install (LGUP_8974_DLL_Ver_0_5_CODEFIRE)
Second Install (LGUP_Install_Ver_1_14_3)
Enter the LGUP program that is probably hosted on your desktop
Select the Upgrade box and select the KDZ / TOT file
Wait for the process to finish (Do not disconnect the phone)
At 80% the phone will restart (not yet to be disconnected)
When you reach 100% the phone must have turned on or starting on the TMO logo
If it does not start
-------------------------------------------------- -------------------------------------------------- ----
If it does not start
---------------------------------------------- -------------------------------------------------- -----
If it restarts constantly and does not enter the system (It restarts before reaching the optimizing application)
Turn off the phone completely and remove the battery
Wait 10 seconds. And put it back
Press Vol- and on when logo is released and press them again.
Give you everything
EYE: all files on the internal SD card will be erased
A factory reset will be made and then it must be turned on normally.
If it still does not start, remove the chip (SIMCARD)
Well that's all if you have any questions please write
Sorry if I needed something, it's just that I'm new and I do not know anything about xda
I hope you understand.
When I run LGUP it says Model is Unknown, then gives an error telling me I have to choose a known Model. Drivers are installed, USB debugging is enabled, not sure what else there is missing. Please help.
my phone: (T-Mobile lg g3 d851 30e)
dricialg said:
error Unknown model.!!
my phone: (g3 d851 30e)
Click to expand...
Click to collapse
sorry you had problems
the error is one of the drivers lg
you should plug it into one of the main USB ports on your PC.
or rather entering device manager and re-assign drivers to ports.
Have you downloaded the lgup for lg g3 and g2?
Drivers are installed, USB debugging is enabled, LG PC Suite OK.not sure what else there is missing.
Download : lgup-g2-g3.zip
Solve it FIX
good after I found the problem LGUP
roms apparently change the model of the device as it changes cm11 to build Cyanogenmod 11 xx
AOSP - to AOSP rom 2 etc.
the solution would be to install a stock rom clean no matter if v10 v30 etc. The important thing is not having changed the model number and manufacturer.
I hope I have helped and sorry
that includes cloudy fa's roms
minicm94123 said:
It has taken me many days to find a tool to flash KDZ AND TOT since many people show an error at 4% of FlashTool and there is no solution so this is your Post.
LGUP is a tool used by Lg for phones that still have a guarantee such as a system error or a software error.
Compatible with Windows vista/7/8/10 No macOS No Linux
Thanks to DroidTH for giving me a link
ok let's start
Renember: All will be erased in the internal memory.
Your warrantly is now avoid
Visit [How-to] Flash firmware KDZ G2 G3 G4 by LGUP On Youtube to the link
Remember that it is not channel advertising, it's just that I can not add external links
Steps to follow
Make sure you have the drivers installed correctly
Download The KDZ / TOT
Connect Lg g3 to pc (No need to enter download mode manually)
Unzip (LGUP-G2-G3.ZIP)
First install (LGUP_8974_DLL_Ver_0_5_CODEFIRE)
Second Install (LGUP_Install_Ver_1_14_3)
Enter the LGUP program that is probably hosted on your desktop
Select the Upgrade box and select the KDZ / TOT file
Wait for the process to finish (Do not disconnect the phone)
At 80% the phone will restart (not yet to be disconnected)
When you reach 100% the phone must have turned on or starting on the TMO logo
If it does not start
-------------------------------------------------- -------------------------------------------------- ----
If it does not start
---------------------------------------------- -------------------------------------------------- -----
If it restarts constantly and does not enter the system (It restarts before reaching the optimizing application)
Turn off the phone completely and remove the battery
Wait 10 seconds. And put it back
Press Vol- and on when logo is released and press them again.
Give you everything
EYE: all files on the internal SD card will be erased
A factory reset will be made and then it must be turned on normally.
If it still does not start, remove the chip (SIMCARD)
Well that's all if you have any questions please write
Sorry if I needed something, it's just that I'm new and I do not know anything about xda
I hope you understand.
Click to expand...
Click to collapse
Where are downloads
minicm94123 said:
good after I found the problem LGUP
roms apparently change the model of the device as it changes cm11 to build Cyanogenmod 11 xx
AOSP - to AOSP rom 2 etc.
the solution would be to install a stock rom clean no matter if v10 v30 etc. The important thing is not having changed the model number and manufacturer.
I hope I have helped and sorry
Click to expand...
Click to collapse
Hi !
How do I do all the above ?
My PC recognize the phone without problem, but LGUp won't start unless I "select a known model"... (LGUp window shows : Model = Unknown ; COM Ports = [COM5, CloudyG3] )
Problem is that my phone is softbricked after installing a new ROM, and I can only enter download mode (not even recovery). I just want to downgrade it and reflash a LG's stock ROM (or whatever ROM that would make my phone actually work !!! )
Can you help me do that ?
raf1978 said:
Hi !
How do I do all the above ?
My PC recognize the phone without problem, but LGUp won't start unless I "select a known model"... (LGUp window shows : Model = Unknown ; COM Ports = [COM5, CloudyG3] )
Problem is that my phone is softbricked after installing a new ROM, and I can only enter download mode (not even recovery). I just want to downgrade it and reflash a LG's stock ROM (or whatever ROM that would make my phone actually work !!! )
Can you help me do that ?
Click to expand...
Click to collapse
Do you still wanting help?
minicm94123 said:
Do you still wanting help?
Click to expand...
Click to collapse
YEEEESSSSSS !!!!
Please.... ?
(My phone is currently used as a toy by my 6 yo daughter ? )
LGUP "UNKNOWN" and FlashTool failure with LG G3 (and possibly others)
When I downloaded and installed LGUP with the DLL installer stated to be for the LG G3, the program did not recognise the phone, reporting it as "UNKNOWN". The LG FlashTool also failed, reporting the IMEI and PID as NULL. After spending a lot of time on this, I twigged that the DLL file in the LGUP model directory was for the 8994 processor; but the G3 has an 8974, quite different and incompatible. I located the DLL installer MSI file for 9874 devices, uninstalled LGUP and the DLLs from Windows add/remove programs, ran the 9874 DLL installer and reinstalled the LGUP program, and everything worked.
The file is, amongst other places, on https://uptoandroid.com/download-lg-up-tool-for-lg-smartphone-latest/. Do not download DLL files for LG G4, LG V10, LG G3, LG Stylo, filename LGUP_Common_DLL_Ver_1_0_28_5 .msi, but instead For LG phones based on Qualcomm Snapdragon 800 MSM8974 SoC, filename LGUP_8974_DLL_Ver_0_5.msi:.
HTH
23 Aug 19: I find that I've rediscovered the wheel. Exactly what I said was posted in 2016 - if I'd found it, it would have saved me a lot of time!
Hello friends. I got the LG G3 D855 and it was dead. When flashing with LG Flash Tool, the same is 4% and gives connection error and asks me to remove the battery. Or else it reaches 15% and it's the same, I've tried everything. The S / W version is D85521A, Spain. Any solution?
hi, I have it working but not sure what made it work.
- get LG flash tool 2014
- flash file I used for Android Marshmellow D85530C_00_0211.kdz (more here http://storagecow.eu/index.php?dir=Xda%2FLG+G3%2FStock%2FD855%2F
- when you have connected your phone change the com port in device manager to 41 (I had done that yesterday)
- install the LG USB driver
well I had really troubles getting it work but somehow today it did it
oh one more thing, leave internet on as you need to select country and language in flashtool, ones a new windows opens, let the first step finish, then pull your lan cable off or disable wifi whatever..
ps: bmatney posted 3 posts down this link, may help too https://forum.xda-developers.com/showthread.php?t=2785089
I have LG G4 and I flashed (upgraded) it through LGUP from 5.1 to 6.0 a couple of days back. This is what has happened.
Before Flashing:
Hardware - LG-H815T
Android - 5.1
Software - H81510p
Baseband - MPSS.BO.2.5.c3-00072-M8992FAAAANAZM-1
Kernel - 3.10.49
Build Number - LMY47D
IMEI - 357766060879504
After Flashing:
Hardware - LG-H818
Android - 6.0
Software - V20a-OPT2-HQ
Baseband - MPSS.BO.2.5.c3-00101-M8992FAAAANAZM-1
Kernel - 3.10.84
Build Number - MRA58K
IMEI - Same
This is what the problems are:
1. The phone turns on but the screen stays black all the time. There is one way to turn on the screen and that is by removing the battery and plugging it to the usb cable and when the screen blinks for the missing battery indication, holding down the power button and inserting the battery. This way the phone turns on as if it has no issues.
2. The internal storage is showing 22gb instead of 32gb.
3. I am unable to flash (upgrade or refurbish) the phone through LG Flash Tool 2014, LGUP and LG Bridge. All softwares partially work through the process and according to my analysis give an error at the point after establishing connection with the mobile when its the time to access the internal storage for writing system files on the phone's storage.
4. I am unable to conclude the model number of the phone because before flashing it was H815T, after flashing it is H818 and when I connect it to LG Bridge, it shows the connected phone as F500K.
5. I tried to unlock the bootloader of the phone by visiting the LG Developer site and when I came down to filling in the information of the phone like IMEI and Device ID derived from the instructions outlined, it does not accept H815 as the model number against the Device ID of my phone and secondly does not list H818 and F500K in the dropdown options.
I don't know what wrong have I done in my life to end up in a situation like this???
Hello there,
To solve this you need to edit a H815 tot file(if u dont have one download here https://androidfilehost.com/?fid=24723757092307739) in a Hex editor(here a portable version of HxD wich i prefer http://mh-nexus.de/downloads/HxDde.zip, just download and run).
Open .tot in HxD, then you CTRL+F for "xVLG-H815" and replace H815 or whatever your tot have along with 'xVLG' to the model your phone is being recognized as(F500K in your case).
Almost done, just save and flash in LGUP using refurbish option
Hello Guys
My friend ask me for get a Lineage OS to his H815 with Nougat. I agreed as I made few successful changes from stock to Lineage OS with Samsungs and older LGs (like L3 E400). But G4 is really more complicated, more than I expected . Firstly I wanted to unlock this phone with FWUL, so I download a VirtualBox emulated image with FWUL and after it boots I opened SALT program and it detects the phone. I made a basic backup and then I choosed Unlock G4 (UsU). After that some windows pop up. Last window was a pre-checking, when the bar gets to the end window closed and nothing more was happening. So after almost hour of waiting I just turned off the phone - I thought its all. After that while phone is booting I have those messages in the left top corner:
[820]-----------------------
[870]
[920] Secure boot error!
[970] Error code : 1009
[1020[ OFFICIAL !!
[1070]
[1120]-----------------------
Its booting, but only sometimes its normal boot, most starts are with bootloop, sometimes its start after 10 restarts, sometimes after 2nd restart, sometimes after plug in/plug out USB cable it starts boot normally (connecting cable only to phone, not to PC), sometimes only thing that helps is to take out the battery. I made full wipe to be sure that its not a software problem, but only thing I achived with that is fact that phone has a Nougat and now it have a Marshmallow. It is (was?) H815, but now model name is LGLS991 (?), it gets very long until it shows software version (V20g), IMEI is unknow, even when I type *#06# I get the null response.
I can get into recovery, can put phone into download mode. But i'm not able to do anything to get LOS or a least Nougat.
I've read many, many tutorials how to get G4 working properly after unsuccessful unlock, but nothing helps. What I've tried:
1. Flashing stock Nougat for H815 with LGUP, installed USB drivers, proper DLL, set com to 41, but when I trying to flash, after a 4% i get error: KDZ file is invalid. Downloaded few KDZ firmwares, dont belive that every single one is invalid, there is something wrong with LGUP or with settings, but I cant find what
2. Flashing with LG Flash Tool 2014: tried both normal flash and cse flash and always stoping in the same moment, with "Connection to server failed. Try again in a moment". Read many tutorials about this error, none was helpful in my case.
3. Flashing with LG Flash Tool v1.8.1.1023 and a TOT file, but after select of dll and tot file and press the yellow arrow I get an error: "Failed PreviousLoad()"
Tried all this methods on second computer but without a luck.
What else can I try to get this G4 working properly? Maybe try to install some rom from stock recovery? But which rom will be ok and dont get things worst?
If you need more info dont hesitate to ask. Would be very greatful for any advices .
you definitely didn't read enough... go to read again the UsU thread and as you've read the whole tutorial, you can also read the whole FAQ and the OP, because 90% of what you pointed out in your publication (which incidentally is in the wrong section) is explained there.
A quick advice: Don't try to flash any KDZ/TOT again.