yashsingh1/xdaforums huggingface dataset:
[G4 General] SketchSlayer:
Well It refuses to boot to download mode with key combo but LGUP reboots it to download mode when told to flash an image to it (hence why I doubt it's like that one old post about the guy who managed to delete the download mode files and eventually bricked his G4),

Unsure why the key combo isn't working but I assume since LGUP can access it that if I knew anything about coding then there might be a way to make a small program to force it into download mode by just mimicking some of what LGUP tells the G4 to do.

Like when I hold the vol up button then plug the usb in it just takes a moment then shows the charging info that it would show normally if plugged in while turned off but in spite of that lgup somehow accesses the download mode.

Oh yeah the system recovery lists it as being modified in the upper left corner as does the software info if that is at all relevant,

Seems that various us carrier variants came stock flagged as modified some of the time and nobody knows why from what little research I've done on that as my recent flash to a stock rom still being flagged modified seemed odd to me.
[G4 General] SketchSlayer:
Okay so I may just be a massive idiot (or my G4 may just be a prick)

It wasn't going to DL mode doing the key combo as it's meant to be done but when you plug in the cable before turning it off and leave it in while holding volume up it immediately went to DL mode...

So yeah I may just be the dumbest
[G4 General] SketchSlayer:
Well after getting past my own idiocy this does work which is wonderful considering how annoying the verizon junk it used to run was.

So yeah thanks.
[G4 General] jemiandc:
Thank you steadfasterX for this helpful thread, sir i have a question and i need also recommendation.

Here is my scenario " I have a lg g4 f500s , i did flash f500l tot, so from f500s it is now f500l (convert it successfully) ;

I also UsU'd my device no issue

GPT compatibility: H811

ARB: 0

Bootloader unlocked thanks to your method and for your tool

also have twrp flashed (twrp working)

***My main concern is that i cant install any of h811 roms compatible , i also have tried removing the first line method and save and zipped it***

***Tried multiple roms no luck need help steadfasterX ***

Please help me , i dont know what to do i forgot to back up everything and tried clean install the first rom that i have tried.

Link that i have used for converting f500s to f500l

https://xdaforums.com/g4/general/tot-lg-g4-korean-f500l-tot-flash-files-t3294417
[G4 General] steadfasterX:
what means: " i cant install any of h811 roms compatible" ?

are you able to install but it does not boot?

is the install itself failing ? -> if so provide the TWRP recovery log after flashing (see my sig)

.-
[G4 General] jemiandc:
The First Rom that i have tried is this:

[H811][N]Freedom Rom v7.5

https://xdaforums.com/tmobile-g4/development/h811-freedom-rom-v7-5-t3704018

*I did tried flashing it using twrp, with no issues. It went to the set up wherein you select features of the rom to enable.

*It goes to the bootup part and will not continue to boot up black screen for more than 30 minutes.

For the rest of h811 roms that i have tried, it doesnt let me continue flasing it.

*The error is about the model f500 not supported (even if i have tried removing the first line of the code and zipping it and flashing it using twrp)

*No Luck :confused:

im new here and i need proper assistance

i dont know if i have done it properly
[G4 General] rsoft3ddev:
Is usu open source?
[G4 General] renguer0:
Hi people, thanks for sharing this fantastic work. I've an H810 (AT&T variant of G4) in bootloop and of course, locked. Can I disable the core or it just briked for life?

ATM I can't check status of ARB or something else.

Thanks.
[G4 General] SomeDooD123:
Thank you so much for this!!! Just unlocked my VS986 and breathed new life into it thanks to all the dev's hard work.
[G4 General] deltadiesel:
Used to usu to flash unlock my device even though it was already unlocked.

My device is now only works with stock ROM....and the fake software mod lg did to make it display as a 811 no longer shows

Now I really have a 810 phone
[G4 General] Bcoates84:
Yes you dont half to pay for it. A donation would be nice to mr steadfester.

---------- Post added at 11:58 AM ---------- Previous post was at 11:52 AM ----------

Go into download mode and check via Salt in Flaw. Your ARB and version(phone model H81# ) should show up in there.

---------- Post added at 12:38 PM ---------- Previous post was at 11:58 AM ----------

No offence ,but are you asking for help? What Phone is this an H81# ? Or something else? Can you tell us What you did more in detail, What UsU you flashed? What GPT you had in salt, Did you make a back up?

II can't say for sure with out knowing what the answers are but sounds like ,an modem (baseband) issue.
[G4 General] deltadiesel:
My phone was 810 with 811 software. It would read as 811 phone even though board was 810. After usu my phone is now a 810. T-Mobile software no longer works neither do custom ROMs. Did not make a backup. How do I make it a 811 again?

Basicly doing usu on my phone really turned it into a 810
[G4 General] renguer0:
Thanks for your reply. Can please you tell me how version I need to be downloading if I plain to mount it on Virtualbox? I see 8GB, 15GB, 30GB on FWUL ISO downloads.
[G4 General] sdembiske:
You can install any of the persistent size versions of FWUL in VirtualBox,

if

you have enough hard disk space. Personally would go to the 30GB to give a little more room to save files or install any updates. Refer to FAQ 4b in the FWUL site and post any related questions in that thread.
[G4 General] renguer0:
OK, thanks. I've installed and updated WFUL and SALT. One phone is recognized as H815 with ARB 0 (bootloader unlocked, don't work with fastboot command) and the other phone is recognized as H810 with ARB 2 (bootloader locked).

Both are in bootloop because motherboard problem.

- There isn't files to disable big core on H815 20a ROM? Or H810 20g? (I was looking this files on this thread)

- A custom ROM file is needed in order to install USU? Or I can disable cores without wiping?

Thanks again for your help.
[G4 General] sdembiske:
To UsU a device, it

needs to be on stock Marshmallow

: From the OP ...

3) Your device firmware must be MM(keep Requirement #2 in your mind when upgrading to MM)

which one? I highly recommend the latest MM version for your model --> but again beware of the ARB (not greater then 2)!

Reference this thread as well: [GUIDE][any UNLOCKED G4]create a custom X cores boot image (ILAPO tempfix)
[G4 General] renguer0:
Hi mate, 20a and 20g are stock MM or I miss something? I've asked if I need to

upload another ROM when USU

. I read the thread a few times but really, it has A LOT of information and I'm asking before read everything else. Hope can you ask me this little question :)

- I've the boot images to custom cores but I have to unlock bootloader (with USU) first in phone that have locked bootloader (h810). And I don't know if I need to upload another ROM or just can USU without wiping device.

- In the other hand, I've a h815 with bootloader unlocked (and original rom). I'm trying to upload boot.bin to disable cores but fastboot command didn't recognize the device (in download mode). What can I do?

Thanks for your help!!
[G4 General] renguer0:
[MENTION=6302635]sdembiske[/MENTION] any ideas mate?

Thanks again!
[G4 General] sdembiske:
Suggest you try this approach, Monday - Friday - stay on & be patient until steadfasterX gets to you:

- Refer to (from the OP) ...

Support / IRC Channel

IRC means Internet Relay Chat and you will get best support there only!
[G4 General] Theamerix:
V10 and G4

Wow and wow, cant believe you actually managed to bypass bootloader unlocking this way. Im kinda sad that my G4 bootlooped out, because this would be really worth a try.

Sorry for this question btw, its a bit off topic, but would there be a chance something similar would work for the V10? They have the same SoCs, and im carrier locked to android MM ^^ meeting all the specs, except for the G4 part... ^^ I would be entirely willing to risk a hard (hard) brick for this :)
[G4 General] yobakolobok:
Nougat official rom

Hello guys. Successfully unlocked my singapore H815 with FWUL. My eyes still bleed a little from its default theme and serif fonts in terminal, but whatever gets the job done. Now I'm looking for a new ROM to flash, and, while OP states 3 times how dangerous v29a is, I'm still curious about official Nougat for G4. I've found this thread where author offers TWRP image of official Nougat update, and it seems that it doesn't touch bootloader. (Correct me here if I'm wrong about bootloader, I need to check with someone who can tell the difference). So, would it be safe for me if I install his image and, just to make sure, flash Nougat modem right after flashing the OS? How can I tell if his ROM is UsU compatible?
[G4 General] steadfasterX:
Consider to read the faq. For v29a it's #16.

Btw the OP do not state in an single sentence that v29a is dangerous ... It clearly states that flashing a kdz/tot will 100000% brick your device. That has nothing to do with the version .
[G4 General] yobakolobok:
Well, making it an example of failure set a shade on it at first. Nevertheless, the #16 helped and now I'm running stock Nougat thanks to that patched ROM and your work. :svetius:
[G4 General] renguer0:
Does anybody has this files? I can't download within Android File Host because it don't show mirrors from this files:

H810_UsU_unlock.zip

H810_UsU_baseband_flash-in-twrp.zip

G4_29a_N_modem_UsU.zip

There is a compatible with USU ROM for H810?

Thanks!!
[G4 General] sdembiske:
Suggest you re-check the Downloads section in the OP - all links to everything you need are working for me and there are specific H810 UsU roms, e.g., Lineage O UsU .... Don't know what your issue is that is preventing you from downloading these, unless links aren't being processed in your browser or your installed anti-virus protection is preventing it or all mirrors were down when you checked (unlikely).
[G4 General] yobakolobok:
Androidfilehosts did the same to me on 4 different devices, it has nothing to do with antivirus, it's just overall buggy and slow. In addition it seems to push back unpopular files, so obviously more demanded stock roms had 3-4 mirrors instantly, and modem files had only Quebec which gives them at 200kb/s at best. I still wonder why it's so popular on xda with such "great" speeds, at this point even MEGA looks better.
[G4 General] renguer0:
OK, solved. H810 was USU unlocked and now have big cores disabled. Thanks for everyone.

The H815 stills in limbo. I can't boot it into fastboot mode and I can't mount external SD from FWUL for flash the big cores disabled images using "dd" command.
[G4 General] UsualNoise:
Quick question - I'm trying to update the bootloader from Lollipop to Marshmallow per FAQ #20 (already did UsU). I downloaded a kdz file for my VS986 (26A) to extract.

My question is: I have an ARB of 1 on my phone right now as detected in SALT. The kdz has an ARB of 2. If I flash the appropriate files to update the bootloader is this a safe action?
[G4 General] UsualNoise:
Update - I ended up flashing the appropriate files in fastboot mode and it seemed to work (nothing was bricked at least). My next question is:

After flashing the Nougat ROM found in this thread (FAQ #16) the G4 hasn't yet finished booting after 30+ minutes. It sits on the LG screen for a while, then goes to "Android is starting / Do not turn off your phone" and then back to the LG screen ... and then back to the "Android is starting" screen. 3 full cycles so far. Is this normal, or has something gone wrong? Seems like the initial boot should have finished by now. And yes, I flashed the baseband in TWRP right after the Nougat ROM flash.
[G4 General] UsualNoise:
Well, looks like I ended up with a hard bricked phone here. After failing to boot in Nougat (see previous) I tried to restore my TWRP backup which was done immediately after UsU'ing my phone for the first time. After that, and while still in TWRP I chose reboot to recovery ... and dead. No power, nothing on any button presses.

Is it possible my bootloader from my original TWRP restore was now incompatible (ARB-wise) after the last couple things I did? Either way, I obviously screwed something up. If anyone knows what, enlighten me.

Also, thanks much to the OP for all the cool tools (SALT, FWUL, etc.) - it was fun learning, even if it cost me my phone. :)
[G4 General] steadfasterX:
that brick highly depends on what you had in your backup and what you restored. If you hadn't done a full one it makes sense.

find out the phone's state first. connect the phone to your PC

when in FWUL type "lsusb" in a terminal and if you see a Qualcomm / QDL line you are in 9008 EDL/QDL mode (when using VirtualBox ensure all USB stuff gets directed)

when in Windows open the device manager and when you see something similar as the above or QHUSB_BULK then its the 9008 EDL/QDL mode

in both cases go on here: http://bit.do/unbrick9008

if not: try the same but this time take out the battery.

If the QDL mode does not come up you might be able to use QFIL but as there are many bad ones out there this way is not that easy/recommended.

The files you will find may increase your ARB which means never UsU again so a better option is using a box like infinity or zbox etc. to flash the partitions back

.-
[G4 General] UsualNoise:
Thanks - I found that thread last night and I'll try later today. And yes, the phone shows up as QHUSB_BULK on my PC. I'll let you know how it goes - thanks again!
[G4 General] UsualNoise:
Regarding the end of that post:

If I end up succeeding in getting to this point, any recommendations as to what I flash in download mode? (Not using lgup obviously since my G4 has been USU'd.) I'm 99% sure my current ARB is 2 as that is the last thing I saw before I bricked. I downloaded VS9862BA (ARB 2) files I found in another thread you commented on - it has USU bootloader as well as other partitions ... but I'm not sure if that is appropriate to try.
[G4 General] UsualNoise:
Success! I used the 9008 unbrick thread to get into download mode. Surprisingly SALT is reporting ARB of 1 (although I saw it report 2 prior to the brick) so I'm not sure why there is a discrepancy. In any event, I'm still unsure what to do in download mode now...
[G4 General] UsualNoise:
My phone is back! (Mostly.) I flashed VS9862BA system files via fastboot mode, making sure the UsU files were kept intact. I also reflashed TWRP to recovery and everything seems to be running successfully. The *only* exception is ... I have no phone service. I can connect to wifi but not the Verizon network. I'll keep looking around to see if there's a fix for this, but I'm so close to having MM installed with UsU active!
[G4 General] sdembiske:
[MENTION=6260190]fates13[/MENTION] had a similar issue with his vs986. Refer to his post

# 446 in particular to see the steps he followed to solve.

The only thing to try currently would be to perhaps reset your network settings and check what is showing in your apn settings.
[G4 General] UsualNoise:
Thanks - I fixed it by reflashing the modem.image portion of my VS9862BA directory. Either I forgot to flash it or I did something else wrong. Either way, thanks.
[G4 General] vampercy:
hi everybody i want to UsU my ls991 but not sure if should i downgrade to lolipop before or should i do it from marshmallow , anybody can help

me?
[G4 General] steadfasterX:
Sure the answer is in the OP. Read it again ?
[G4 General] vampercy:
Yeah. I see. so it won't work. Because my ARB Is 4.
[G4 General] Sir Daniel III:
Hey, I have a LG H812, and is thinking of using UsU so I can unlock this device.

The forum is too long for me to read, so is it okay if anyone could summarize it for me?

I also have some questions right now:

- How do you get SALT?

- The link for TWRP is broken along with the modem one.
[G4 General] steadfasterX:
summarize it? too long to read? The OP and FAQ is long for a reason - if you cannot handle to read it you should not unlock with UsU.

How to get SALT? Its written in the OP.

The link for TWRP is not broken.

dont know what link for modem you mean.

.-
[G4 General] sdembiske:
I trust you are joking about someone summarizing it for you ... ? Read the OP (

0

riginal

P

ost by the author - 1st post on the 1st page) as everyone else has had to do. Follow the installation instructions exactly under OK enough about all this: LETS UNLEASH YOUR DEVICE! and look at FAQ #22 beforehand.

Modem link is working for me, if you are talking about the N modem (only required if your are planning to install the stock Nougat rom in the Downloads section). Try another browser.

You should do a full backup of the Marshmallow rom you are currently using (assuming it is up-to-date with the latest version) with SALT in order to be able to re-flash your M modem if you are installing any of the custom N and O roms in the Downloads section or run into any serious issues (shouldn't happen if you read thoroughly & follow things exactly and don't stray off the appropriate roms that are in the Downloads section).

SALT

: [TOOL][LOCKED/UNLOCKED] SALT - The LG(up) revolution (begins)

TWRP

: [RECOVERY][OFFICIAL][F500,LS991,H81x,US991,VS986][MM,N,O] TWRP [2018-08-06]

If you run into any problems that is what the forum is for. Learn to use the search bar in the thread to see if the question/answer/issue has been asked &answered/solved already.
[G4 General] Sir Daniel III:
Sorry when I meant summarize I mean to ask if there was anything else important discussed in the forum (didn't know about the search bar).

Apparently the links didn't work under school wifi, so I'm good on that now (downloaded them at home).

Gonna flash FWUL on my laptop now.
[G4 General] Sir Daniel III:
Okay so I flashed FWUL on my laptop and got SALT running. I already moved the aboot, laf and rawres files into the Download folder in Internal Storage.

I then booted my LG G4 into download mode, but SALT doesn't detect it, even after I wait a while. I tried doing a backup (basic --> Should probably make a Full one...), and that seemed to work. But when I pressed UsU, and it doesn't detect my phone.

Anyone have any solutions?

https://mab.to/4WsIxWMhL

This is the error message I got
[G4 General] steadfasterX:
Share the debug log after you get the error (advanced menu -> debug log -> click upload button and share the link)
[G4 General] sdembiske:
I you are using SALT in FWUL in VirtualBox, refer to post # 529 in the FWUL thread. There are two USB settings in Virtualbox that have to be checked, one of which has to be done every time you connect your device. There's also a couple of other things to try.
[G4 General] Sir Daniel III:
Okay so I've successfully unlocked my LG G4 H812 and installed Lineage OS 15.1 on it! Thanks a lot for the tools you guys provide, I can't believe I have Android 8.1 on my phone now :D

(SALT worked on my desktop and everything went smoothly from there on)
[G4 General] roberto888:
Hi [MENTION=5545101]steadfasterX[/MENTION]! I have talked to you a while ago about not having cellular after flashing around. I kinda gave up, but I am back to it now. I've been trying all sorts of stuff to fix it, but as things stand right now, my IMEI is gone. I booted to the IMEI Display and it shows nothing. Can it be fixed? I was trying to write the original IMEI with EFS Professional, but can't seem to connect to the phone with the SPC or whatever. Looking forward to your reply.

Thanks, Rob
[G4 General] berkantkz:
I've the same issue. You may want to follow my thread in case we get any help.

https://xdaforums.com/g4/help/unknown-baseband-null-imei-t3919036
[G4 General] steadfasterX:
When your IMEI is not shown in the imei screen you first have to fix that before doing anything else.

The fix is quite easy when you have a backup from the time where the IMEI was working: flash the partition "misc" and it will be back.

complete different issue here. when the IMEI isn't shown in the imei boot screen it is gone and need to be recovered.

your issue is special and I will answer in your thread asap.
[G4 General] berkantkz:
Oh, well. I forgot that his imei had gone on imei screen. The only thing I remembered while quoting him was that he had unknown baseband and null imei.
[G4 General] roberto888:
In lack of said backup, is it possible, to modify a stock misc partition with my original IMEI and flash that to the phone?
[G4 General] LukeSlovian:
Hello, everyone. I am asking you very warmly for your support. Is it not official method to unlock the bootlader in the LG G4 H815?
[G4 General] steadfasterX:
maybe... but XDA is very sensitive when it comes to IMEI so no further help here.

feel free to come to IRC though but I am

not

online this week.

.-
[G4 General] LukeSlovian:
I have a problem.

[IMG="The Problem a SALT Stable Aplikations"]https://photos.app.goo.gl/Y9aBhDbdSaFyW6eRA[/IMG]
[G4 General] adam_s_459_:
Well......... If u don't tell what it is how can people help?

(Provide as much info as possible)
[G4 General] steadfasterX:
I like his statement .. :angel:
[G4 General] LukeSlovian:
Ok, I'll throw in a precise description, a bit later
[G4 General] nenich78:
Hi again! I have flashed this :H815-ONLY_ARB-0_v29a_FULL-STOCK-ROM_UsU . Then received this message:

"Warning! Current version is not available for user. Can not find matched cust for NTCODE =[,]"

Then the phone started and is working OK at least to this moment. What the shmuck is this about???
[G4 General] steadfasterX:
This is not UsU related and a well known "issue" which seems to have no other effect then being annoying (no functionality loss etc) while fixable.

Tip: Use the XDA search :P (e.g. https://xdaforums.com/search/?query=Can not find matched cust for NTCODE )
[G4 General] LukeSlovian:
Hello Dear Developer of the hybrid operating system, thanks to which we users can use the SALT application.

Describes my problem in detail:

Recording of the ISO image of the SALT operating system was carried out successfully on PenDrive

Running the FULL operating system with PenDrive works correctly.

After launching the SALT application, which is available in the folder described for LG devices, I can find the SALT application icon. The SALT application itself starts correctly.

I can not do anything to make SALT correctly detect my smarphone

After starting the SALT application, should I run an installer with drivers for LG?

Help me specifically find the drivers you need?

Give me the name of the folder in which there are any drivers to install in order to run the correct detection of the LG G4 H815 by the SALT application in the FULL operating system.

Dear Developer of the SALT system. I am asking you with a very cordial request for your technical support. I described my problem in detail in my screen shots, which I managed to do. Here> https://photos.app.goo.gl/cy5pJVExacQhgjpW9 I am asking you with a very cordial request for your technical support, take a look at these screenshots, I run my LG G4 h815 smartphone in downloadmode mode, and so the SALT app does not detect For my LG G4 H815, please help me by answering my post.

Which installer icon from the LG folder launches the installation of the drivers needed to run the correct communication between the LG smartphone and the SALT application?

Also in this link which I share is a screenshot showing the contents of the LG folder. So, show me the correct path to follow, is my problem with the lack of installed drivers, that my LG G4 h815 smartphone does not connect to the SALT app correctly, is this problem something else? I am asking for your detailed support. I am waiting for your support. Greetings.