yashsingh1/xdaforums huggingface dataset:
[LG V40 Guides, News, & Discussion] serpent android:
Great tutorial helped me get fastboot mode afrer i bricked my device.i followed each and every step carefully and was able to get fastboot. But i need download mode for lgup to recognize so i can flash the android 10kdz. I have to flash laf a and laf b partitions with the v35 engineering bootloader right?

---------- Post added at 04:16 PM ---------- Previous post was at 03:44 PM ----------

Great u mentioned all things v clearly.ok o habe fastboot mode but i neee to get into download mode.how will i get that by flashing what oartitions with what?
[LG V40 Guides, News, & Discussion] arfhel09:
Currently LMV409N with android 10. I have followed the guide. Was able to load the v35 image. No matter how I tried, I cant seem to boot to fastboot, it always boot me back to regular android. Please help.

I wonder if Korean v40 doesnt have a fast boot . The guide to nuke laf to enable t also requred fast boot though. Thanks.
[LG V40 Guides, News, & Discussion] serpent android:
Hi.i have entered fastboot mode by fkashing abl a partition eith v35 engineering bootloader. But i need download mode to get LgUp working. So should i flash laf a and laf b partitions with the same v35 engineering img or should i glash with some other files to get download mode.

---------- Post added at 09:57 AM ---------- Previous post was at 09:53 AM ----------

Hi any way to get into doenload mode.i have flashed abl a partition with v35 engineering bootloader and it is going to fastboot mode. But i need to get into diwnload mode for lgup to recognize.how should i get dl mode and what exact files do i have to flash
[LG V40 Guides, News, & Discussion] AsItLies:
the abl partition is the boot loader partition (abl == android boot loader). As the directions point out, flashing the v35 eng file to abl_a allows you to have fastboot which can then unlock the boot loader.

the laf partition is an LG special partition for restoring the device to a factory state (using LGUP). As the OP states, if you want to have fastboot mode permanently (the v35 eng file can only be considered 'permanent' if you stay on Oreo), then you simply erase the laf partitions (then when you use the keys to go to LGUP (aka download mode), you'll instead get fastboot.

Just as Xsavi says in the op: "6. You have now unlocked your device, and if you nuked your laf partitions, you have fastboot access as a bonus (But, no more download mode until you flash LAF back)."

So 'no more download mode until you flash laf back'? How do u get dl mode? flash laf back? right?
[LG V40 Guides, News, & Discussion] serpent android:
I dont get the point i have to reflash laf a and laf b with what files to get the download mode bacl
[LG V40 Guides, News, & Discussion] AsItLies:
You need to flash the original laf files back. The ones that the directions tell you to save before you erase them.
[LG V40 Guides, News, & Discussion] serpent android:
But ive erased it as i flashed partitions. I need laf a and b then
[LG V40 Guides, News, & Discussion] AsItLies:
Yes, you do need them if you want DL mode (LGUP).

I'd suggest you indicate which version of LG OS you are using, is it the US open version? which one, and if you have pie, or oreo. Then someone might have those laf partitions saved off and can make them available to you.
[LG V40 Guides, News, & Discussion] serpent android:
Actually sir i cross flashed lg v405ebw having pie with korean android 10. It aas done but i lost signals so i flashed the modem aand modem b with the previuos pie hong kong version.destroyed.then got edl 9008 mide used qfil and then flashed laf a and b with images.. But somwhow i had fastboot mode which is great but as u know that download mode is needed for lgup. So im just looking for that. And can i flash the laf pie or laf android 10
[LG V40 Guides, News, & Discussion] AsItLies:
Haha I have absolutely no idea. It sounds like you have some kind of Frankenstein phone. All I can tell you is that, as far as I know, you need to have the same version (pie, etc), of the same OS, in ea partition, for it to boot.

But it sounds like you have various versions in various partitions, so all I would suggest is to try different lafs and see if the work. If your just going to go into DL mode, and not boot the device, they may work. I've no idea really.

good luck
[LG V40 Guides, News, & Discussion] serpent android:
Thanks dude.i will try the various lafs and see which one brings the fukin download mode
[LG V40 Guides, News, & Discussion] dargor1406:
Does this mode work on the Sprint variant?
[LG V40 Guides, News, & Discussion] serpent android:
Hi. Im doing something wrong here. I flashed engineering v35 bootloader into laf b. So i have to flash what laf files in laf b and in abl b also to get download mode. I currently have fastboot mode no matter wgat i fkash in laf b.plz guide sir
[LG V40 Guides, News, & Discussion] AsItLies:
You know, yer not the only one who hasn't managed to get this done. What I mean is, you should read other threads as this has been talked about / explained numerous times.

The first thing I'd suggest, and sorry if it sounds harsh, but don't do another thing, if you don't know what you're doing. Because you're only making things worse.

What you **don't** do is flash the v35 engineering ABL to anything other than the ABL partitions. NOT TO THE LAF partitions. The only thing you do with the laf partitions is 1) erase the laf, which would then give you fastboot or 2) reflash the original laf file back which then gives you download (LGUP) abilities.

Right now, I'd say concentrate on getting the original laf files, flash them back to laf_a and laf_b, then use LGUP to flash a kdz, so you can begin 'fresh'.

If you didn't save your original laf files, before erasing them, then post here what OS you're running, pie, oreo, etc and which variant; us_open, etc.

Maybe then someone will have the laf file saved off and they will post it for you.
[LG V40 Guides, News, & Discussion] serpent android:
How exactly did u get downliqd mode.im in fastboot mode and it says waiting for devices.how u fixed this
[LG V40 Guides, News, & Discussion] arfhel09:
Can I wipe laf using Qfil?
[LG V40 Guides, News, & Discussion] AsItLies:
yes
[LG V40 Guides, News, & Discussion] arfhel09:
Thank you. Finally unlocked it. All this time, the slot active was the slot b.

Tip: make sure to do a backup for both laf and abl. This had come handy with me specially coming from an android 10 firmware.

Cheers!!!
[LG V40 Guides, News, & Discussion] arfhel09:
Found a solution that works, I found myself needing the download mode too.

https://xdaforums.com/lg-v40/how-to/guide-lgup-root-t3967858
[LG V40 Guides, News, & Discussion] johngare:
I hope something like this can be done for lg g6 korean variant
[LG V40 Guides, News, & Discussion] serpent android:
Hi.what drivrrs did u use with windows.i have fastboot screen but windows doesnt detect the right driver
[LG V40 Guides, News, & Discussion] arfhel09:
Lg mobile drivers should work. This has been the same drivers I have installed since lg g6
[LG V40 Guides, News, & Discussion] Khalil alqisy:
I have sprint lg v40

But there's no fastboot even after i erase my laf a and b partition

Can you help me please i really want to unlock and root my sprint lg v40
[LG V40 Guides, News, & Discussion] contevo:
i have verizon version android 10 v405ua30b latest update, im missing OEM unlock option under the developer...
[LG V40 Guides, News, & Discussion] serpent android:
Hi all.previously i was easiky enteri g the edl mode but now i cant.the scrwen goes blank but 9008 doesnt pop up. Ive used 3 different pcs.also ive installed the correct drivers too.any solution i need to run qfil.
[LG V40 Guides, News, & Discussion] Redline:
Doubtful. We already have the firmware needed to boot and run ROMs such as LOS 17.1 and they're mirrored, so while yes LG could hypothetically break something in a future release I highly doubt they will, and even if they do we already have what we need. So.
[LG V40 Guides, News, & Discussion] copota:
OK, I screwed up and bricked my phone by selecting delete GPT when deleting my laf partition. Now I have no partitions.

Is there any way to recover from this or should I just go buy a Galaxy Note 9 and forget about this nightmare of a LG phone.
[LG V40 Guides, News, & Discussion] ChokoWell:
Hi,

i have this problem
[LG V40 Guides, News, & Discussion] Ugedarkline:
BlackScreen

LG V40 korean SKT

I got wrong step because an hurry , now my screen , only show small notice "KEY TO SHUTDOWN" at upper left corner , mostly blackscreen

i’ll try flash stock abl to abl partitions.

[MENTION=5796697]Xsavi[/MENTION] How to flash to my abl partition , i connect it to pc didnot detect my v40

[MENTION=5796697]Xsavi[/MENTION] thank you , now it fix by hold power+Vol down , while tapping fast rapidly Volume Up until connect to PC

Now at fastboot i have status UNLOCKED
[LG V40 Guides, News, & Discussion] skribe:
disregard. just needed to reset the phone again.
[LG V40 Guides, News, & Discussion] sdotkdot:
If I don't have the OEM unlock option, I'm guessing I'm SOL?
[LG V40 Guides, News, & Discussion] idntknoyunw:
Where are you looking?
[LG V40 Guides, News, & Discussion] Ugedarkline:
LM409n Korean stuck on fastboot

actually my LG LM409n , why now at fastboot mine show status LM405 UNLOCKED , stuck on fastboot , can u inform next step to root n fix it ??? maybe i do wrong step

Edit : now have TWRP , still try to fix bootloop

NB : my English very bad :D:D
[LG V40 Guides, News, & Discussion] legend1250:
I have one LN-409N and have to wait your status now

First time to unlock LG phone, it's too much complicated :eek:
[LG V40 Guides, News, & Discussion] Ugedarkline:
now , bootloop at TWRP:) maybe will try fresh install custom Rom
[LG V40 Guides, News, & Discussion] wigglesthephone:
Confused

I've got a V405UA. I get the phone into EDIL mode, I load the partition, I restart with the down arrow and it just boots back to the normal screen.

I've checked my port_trace logs and they look good. Any guidance on what to try next would be greatly appreciated.
[LG V40 Guides, News, & Discussion] wigglesthephone:
Finally got to the fastboot screen, ran the unlock command and got this:

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot oem unlock

...

FAILED (remote: Set device unlocked! failed: 00000050)

finished. total time: 0.016s

The fastboot screen shows it's still locked.
[LG V40 Guides, News, & Discussion] Ugedarkline:
i forget detail , try each : update adb interface driver , plug out n reconnect usb , fastboot getvar all , change active slot a/b

im done install CustmRoM n root it with magisk (nubie , vm v409n)

---------- Post added at 08:39 PM ---------- Previous post was at 08:28 PM ----------

retry step from begining at QFIL , chose Storage = UFS , tools >> partition manager , then load v35eng.img to abl_a abl_b (@me) then close n reboot to fasboot
[LG V40 Guides, News, & Discussion] lmick14000:
Qfil error

solved - please delete this message
[LG V40 Guides, News, & Discussion] madturbo123:
Thanks heaps op.

Now I can go to something light like lineage. I have both the v40 and 15.1 linage on my v20 and prefer using that over my stock v40, so bloated.

Has anyone tried this on the Aussie LMV405EBW?
[LG V40 Guides, News, & Discussion] broe7788:
My v40 is still on lease with sprint for 4 months. If I attempt this, will it work?
[LG V40 Guides, News, & Discussion] cogpie:
Just to add something that is interesting: if you try to use QFIL when you have a folder shared from your Host OS to your Guest OS, this can cause 0x00 (NUL) byte prefixing to some messages going over the Sahara protocol. This is really odd, but whilst I had a Shared Folder (in VirtualBox, seen as a Shared Network Drive in windows) this would cause the application to fail when trying to load the partitions, but a different error than the timing (or environment) one above - which, does seem to be more about timing after doing this a few more times.

After this [MENTION=5402689]DLS123[/MENTION]'s Magisk tutorial was a breeze, and rather than unpack a KDZ I just used Mode 9008 to dump the boot_a/boot_b partitions. Then had Magisk install itself onto them and then restored them back.

Final result: Locked bootloader, Unrooted, LM-V405EBW V20a-IND-XX converted to Unlocked bootloader, Rooted, LM-V405EBW V20e-LAO-COM and everything so far seems to be working for me. However, there may be some issues around SafetyNet due tot he system noting that the Bootloader is unlocked... but I guess we can patch that up later anyway.
[LG V40 Guides, News, & Discussion] Flowtron3000:
Someone in the v35 forum said this method would work for us. Is this true? Has anyone tried it on the v35?
[LG V40 Guides, News, & Discussion] dragonsamus18:
I had this same issue after OEM Unlock finished as I probably skipped a step. Not sure if you still are, or if even related.. FASTBOOT worked for me.

fastboot flash (partition name) image.img for example:

fastboot flash abl_a ablpiestock.img

fastboot flash boot_a twrp.img

Good luck.
[LG V40 Guides, News, & Discussion] cochran069:
once i get the phone into 9008 mode i had to go to device manager and select the device and point it to different drivers to get it to work for me. i hope this helps you some what i cannot remember what drivers i points the device to but once i did i worked,

i think i tried

ADB Testing Interface

---------- Post added at 12:16 AM ---------- Previous post was at 12:06 AM ----------

just want to say thank you for this wonderful guide i successfully, unlocked bootloader > Cross-flashed and Relock bootloader.

followed the steps and replaced the unlock code with, fastboot oem lock.

which there was a way to revert to stock sprint KDZ
[LG V40 Guides, News, & Discussion] ronnay ryukay:
May I ask, how do I enter EDL Mode for the LG G5?

I can't try this method at all, I'm already confused because it's stuck on fastboot
[LG V40 Guides, News, & Discussion] AsItLies:
Ahhhhh, you want to get into edl mode for the G5? because? do you have an engineering abl for it? You say you can't "try this method at all"... you do realize this method, in this thread, is for the LG V40?

The G5 has an 820 chip, the V40 has an 845 chip, the 'methods' are not interchangeable...

maybe I've completely misunderstood?
[LG V40 Guides, News, & Discussion] cmichaelt:
Solved my issue
[LG V40 Guides, News, & Discussion] Khalil alqisy:
Can you plz explain how you get your sprint lg v40 bootloader unlocked, when there's no fastboot mod in lg v40 sprint, even after wipe laf partition.

Sorry for my bad English.
[LG V40 Guides, News, & Discussion] ronnay ryukay:
SOLVED sir...
[LG V40 Guides, News, & Discussion] AsItLies:
That's awesome, and it's really beneficial to others when people do as you did... just say 'SOLVED' and not explain anything about how, what you did, what you were trying to do, what got fixed, what didn't work...

yeah, that's really informative, just say 'SOLVED sir'. Brilliant, your involvement in this community is unsurpassed ;) I'm sure it will prompt lots of people to want to respond to your future posts :cool:
[LG V40 Guides, News, & Discussion] jeysanthosh93:
AT&T unlocked phone unable to load bootloader

I have an AT&T V40 Thinq. I was able to flash the v35 engineering bootloader onto abl_a. But my device is just not loading into bootloader. Is there a way to boot into bootloader? Tried through adb but still no luck.

I'm on Android 10

P.S: I'm trying to get rid of the "Emergency Call" button from my lockscreen. If there is a way to do it without rooting please suggest.(No don't say use an alternative lockscreen, I need the ability to use my fingerprint)
[LG V40 Guides, News, & Discussion] jeysanthosh93:
How did you load bootloader after flashing the v35 engineering image?
[LG V40 Guides, News, & Discussion] notanymore:
Does T-mo version still not have bootloader unlock anybody know?
[LG V40 Guides, News, & Discussion] badseedjr:
What do you replace it with? it doesn't really say in the tutorial.
[LG V40 Guides, News, & Discussion] AsItLies:
With the original abl file. In other words, once you've used the engineering abl to unlock the device, now put it back the way it was:

by using: 'fastboot flash abl_a path-to-wherever-you-saved-the-original-abl-image/abl_a.img'

Once the bootloader is unlocked, if your device is anything but Oreo, you have to put the original abl back or it won't boot. There are other ways to get fastboot available once the bootloader is unlocked, on devices other than Oreo.

good luck.
[LG V40 Guides, News, & Discussion] KouaV1:
I dont think you can unlock the bootloader anymore if your on official android 10.
[LG V40 Guides, News, & Discussion] badseedjr:
Google Fi version issues

I can follow this tutorial and get the v35eng to load via qfil, but it still won't unlock in fastboot. It's like it ignores the v35eng bootloader and goes back to the original. Any ideas? I get FAILED (remote: unknown command)
[LG V40 Guides, News, & Discussion] nguyenvantuc:
It's work for lg v40 405UA?
[LG V40 Guides, News, & Discussion] luislasonbra:
Hi, how can I remove the boot message after unlocking the bootloader, on my LG v40?
[LG V40 Guides, News, & Discussion] heliguide62:
Hey guys , im having a problem getting into EDL mode. I'm holding down all 3 buttons until the screen goes blank, then hitting vol+ repeatedly. per instructions It will just boot back to android or to recovery .however I do think I might have a USB driver problem im getting a ( Unknown USB Device Device descriptor request failed) error msg . Ive tried the usual .. uninstall re boot fix but no luck..anyone else run into this? I'm a little rusty at flashing stuff and I'm new to the lg scene I'm coming from the HTC community
[LG V40 Guides, News, & Discussion] AsItLies:
You copied the entire first post, just to ask a one-sentence question? Really?

The bootloader unlock message cannot be removed.

---------- Post added at 02:09 AM ---------- Previous post was at 02:04 AM ----------

You're only supposed to hold down power and volume down together, if the phone is booted to the OS, doing this will give you a countdown box from 5 Seconds. It's just after the screen goes blank you want to start pushing the Volume Plus button up and down quickly. That's what will put it into edl mode.

Once in edl mode, that's when you can look in devices to determine that the device has been identified. If the device is in there with a? Next to it, then you need to get the right driver for it.
[LG V40 Guides, News, & Discussion] heliguide62:
After screen goes blank and you start tapping the volume up.

do you keep the vol. down button pressed as well?
[LG V40 Guides, News, & Discussion] AsItLies:
Yes, keep the other buttons pressed as they are and just start doing the volume up up and down as much as you can quickly. The phone will either go blank, indicating that it's in edl mode, or it will reboot. If it reboots, it just means that you didn't press the volume up up and down quickly enough at the right time to make it go into a edl. So that means you try again.
[LG V40 Guides, News, & Discussion] heliguide62:
thanks man ill keep trying!
[LG V40 Guides, News, & Discussion] heliguide62:
So im kind of stuck her folks. Im not sure the V35 image is flashed correctly .I can't seem to get into fastboot via the volume down power method . But in the status box in QIFIL it says " finish send image" does that mean the image is flashed correctly?. My download of the v35 img does say it is corrupted possible. Bad download? My phone is stuck on LG logo
[LG V40 Guides, News, & Discussion] R800x_user:
It's volume up and usb.
[LG V40 Guides, News, & Discussion] heliguide62:
Would that still work from the LG V40 thinq screen??
[LG V40 Guides, News, & Discussion] R800x_user:
No you have to power off, unplug it. Then plug it back in while holding up the volume up and it should boot to fastboot unless you didn't delete both laf partitions. If you didn't you would basically have to restart the process and once getting to fastboot you can fastboot erase laf a and b. Once laf is gone you use the volume up and usb method to get to fastboot.
[LG V40 Guides, News, & Discussion] AsItLies:
The way it will work is, after flashing the v35-engineering abl, with qfil (be sure to flash it to whichever side is currently booting - usually it's 'a'), then you now need to get out of edl mode, to accomplish that hold pwr and vol down, until you hear the windows 'chime' indicating disconnect. At that point just let go of pwr button but keep vol down pressed (and of course leave it connected with usb to pc).

That's how you get into fastboot. If you do it that way it will work whether you have oreo or pie running, because you aren't booting the device, just immediately going to fastboot. At this point you can oem unlock and flash the original abl back after unlocking.

If you try to boot the device with the engineering abl, which is oreo, and you're on pie, it won't boot. That's probably why you're stuck on the logo.

cheers
[LG V40 Guides, News, & Discussion] AsItLies:
Sahara errors seem to happen for a few different reasons. One I had was fixed by flashing the following *signed* Qualcomm driver

There is a way, depending on your version of windows, to deal with unsigned drivers, but me, win 8.1, I just used the above and it fixed my sahara error. Might work for you too.

cheers
[LG V40 Guides, News, & Discussion] yemkoid:
Got bricked no download no fastboot. ALL SLOT ARE UNBOOTABLE

My phone is bricked flashing Lineage 17.1 and series of lots of mistakes...

erased laf_a laf_b till i got to unable to fastboot flash anything and it will return CANT FLASH IN UNLOCK STATE...

Tried to relock bootloader if it will solved the issue only worsen things...

Now,

no download mode no fastboot and connecting charger doesn't charge phone the security warning pops up and when i try to use vol+ and usb to pc combination, i get to the security warning page and ALL SLOT ARE UNBOOTABLE error...

Pc doesnt recognise phone it only reboots to same security warning screen
[LG V40 Guides, News, & Discussion] yemkoid:
US UNLOCKED 20e original abl laf_ab needed please

I'm now able to boot 9008 mode even when screen off. Flashing v35 doesn't bring back fastboot

Please who can help with pie 20e original abl & laf (a and b)

I don't know if the files will be any useful with qfil?
[LG V40 Guides, News, & Discussion] heliguide62:
Still can't get this into fastboot tried everything . When I tried the method you suggested , it will just boot back to the LG screen. When I try the power off volume up it goes to download mode. Its basically soft bricked . I was thinking of trying to flash stock KDZ with LGUP and return to stock but apparently there is no Sprint KDZ available . If anyone has any suggestions im all ears..lol
[LG V40 Guides, News, & Discussion] AsItLies:
Well, something isn't being done properly, it's worked for, I don't know, hundreds of others?

One thing for sure, yes, if you haven't deleted the laf partition, from off, press vol-up and plug in usb, will go to lgup / download mode. It's suppose to do that.

**IF** you **have** deleted the laf partition, the above combo will take you to a version of fastboot, but it's not the **full** version, which is what the v35_engineering_abl is for. Flashing that to the abl_a (or abl_b if on b slot) will give you, the full version of fastboot which will allow 'fastboot oem unlock' to work (be sure to enable oem unlocking in developer options first).

Assuming you understand and have been following the above, I can only think to suggest that you flash the engineering abl to both a and to b, and again follow the directions I mentioned above (prev post) to get out of edl and directly into fastboot.

**IF** you are doing all of the above properly, and it's still not working, then I can only guess you have some rom installed that is preventing it from working? Which rom is on the device?
[LG V40 Guides, News, & Discussion] kmlzrl:
bricked bootloop

after hours stuck in fastboot with unlocked bootloader, i finally manage to flash abl_a ablstockpie.img.

fastboot reboot ... AND it bootloop

the screen just lights up, flashes, off and repeat.

FML