yashsingh1/xdaforums huggingface dataset:
[LG V20 Guides, News, & Discussion] jeanclaudevandamme:
i'm in the same position as you.

https://xdaforums.com/showpost.php?p=74098415&postcount=1132

I bricked the phone because of ****ty instructions from emdroidle. it was not made clear you needed to manually open your own CMD windows after the ones that comes from running the BAT files close. Then manually change location to ADB folder then run the flash commands.

Did you run Step3.BAT like I did?

emdroidle should never write a guide again.
[LG V20 Guides, News, & Discussion] jeanclaudevandamme:
https://xdaforums.com/v20/development/dirtysanta-h990-t3624296

go into Method 2 fastboot

run flash commands there to flash imgs

i managed to succesfully install TWRP by using that.

though my phone still doesn't load into homescreen, so still failed root overall, but no static thing now...

----

download mode is still static unfortunately, even after TWRP installed
[LG V20 Guides, News, & Discussion] forward1987:
hi guys my phone ls997 update to zv8 can i do downgrade firmware to zv6 or earlier ?
[LG V20 Guides, News, & Discussion] wozz9192:
Hey there,

I've been reading a guide to install root on my h990ds, and understand i need to install a fw from before dec 31 for it to work..

My problem is i have no idea which fw file to pick.

Phone is a h990ds, and lg up says current fw version is H99010f

Bought my phone from China but i live in Aus. Can i just choose an oceana fw for h990ds to load? I'm not quite sure how to determine correct version to get..

Edit: in settings, sw version shows as v10f-twn-xx.

From reading other posts i do need the right region
[LG V20 Guides, News, & Discussion] wozz9192:
bugger, so I downloaded the TWN H990DS10c file and flashed it ok, though now i'm getting app crash messages every second, phone is very unresponsive.. going to try factory reset.

Cant download any other files today because the firmware website limits to 2 files a day (and I started downloading another file before I realised!)

Edit**

Factory reset fixed it. Now rooted ok. Guess i hve to disable updates though or it will remove root again
[LG V20 Guides, News, & Discussion] jason504:
Ok I have a big problem. I sold my V20 on ebay to someone a jerk. I put in the description that it was rooted. So he screws it up don't know what he did to it. It will only boot up into TWRP. I have a rom download on the phone I wiped and tried to flash it but it keeps on booting into recovery. He also scratched my screen up. Looks like he dropped it and then deliberately bricked the phones so he could get his money back. So he got his money back I am screwed out of the money I paid to mail it and I have a scratched up phone that bricked. Not a happy camper. It is a Tmoblie phone. I was reading a little in this thread but I need to know how to get this phone back to stock. The directions are a little confusing and I don't see my model number on here. Any help would be much appreciated thanks.
[LG V20 Guides, News, & Discussion] storm68:
Delete

---------- Post added at 09:20 PM ---------- Previous post was at 09:18 PM ----------

[/COLOR]Delete
[LG V20 Guides, News, & Discussion] jt1998:
which model number do you have?
[LG V20 Guides, News, & Discussion] jason504:
I am not at home but I think it's H918 Tmoblie

---------- Post added at 12:39 AM ---------- Previous post was at 12:18 AM ----------

Ok yes it's a H918TN I deleted everything off my computer for this phone because I sold it and now this. Thanks
[LG V20 Guides, News, & Discussion] jt1998:
You should be ok. Download the firmware for your device and use the LG up tool to restore it. You'll need updated drivers etc. To clarify, I did this with the same model you have. everything for me worked that was listed in the 1st post of this thread. Good luck!
[LG V20 Guides, News, & Discussion] jason504:
Thanks. Everyone watch out selling phones on Ebay.
[LG V20 Guides, News, & Discussion] jason504:
It worked easy. Thanks for your help now I can try to sell it again.
[LG V20 Guides, News, & Discussion] zszabo:
Try to install twrp (I think 3.0.2.7 and 3.1.1.0 are the versions I've used to resolve this issue; if one doesn't work,try the other). That might resolve your boot loop issue. The boot loop is likely due to the fact that the phone was started in factory erase mode (VolDown+Pwr) - which is the only way to enter recovery besides booting into recovery from a rooted a android os, afaik. I'm guessing this triggers a modification to the misc partition which is cleared by the reset. However, that reset never occurs (because of the modified fw) - hence the loop.

For the screen, covering it with a screen protector can be effective in covering up scratches, depending on their severity.
[LG V20 Guides, News, & Discussion] jason504:
Thanks I already Flashed it back to stock. Yeah the person I sold it to on ebay really screwed me. I think he dropped the phone and scratched the screen. So he did something to soft brick the phone and blamed it on me. He said the phone came soft bricked. Which is bull. But ebay gave him his money back and he gave me my one and only negative feedback. So now I am out my shipping money and I have a V20 with a scratched screen. So now I have to try to sell it cheaper than I originally had it for. Ebay told me this.... A seller needs to take a loss every once in awhile.
[LG V20 Guides, News, & Discussion] ive9th:
Im on a Verizon VS995 and I was able to downgrade from 15 to 12a. After I did it, my phone looked the same and was trying to upgrade so I pulled the battery.

Also, I got the process error android.process.acore has stopped that kept popping up but did a hard reset per someones instructions on this thread and that addressed it.

Also note, I had to run the program as an admin. I extracted the dll directly from the kdz file using WindowsLGFirmwareExtract-1.2.6.1-Release. I had to rename it as well. I dont want to get too granular in the instructions but just wanted to give an overview for anyone who may be searching this thread.

Next Im going to try to unlock the bootloader with dirtysanta.
[LG V20 Guides, News, & Discussion] azaman100:
Whenever I flash any Inidan firmware from lgfirmware website...my phone software shows AME instead of IND. Why is this happening?
[LG V20 Guides, News, & Discussion] buggerman:
Is there a tamper detection mechanism in this phone? Can that also be reset using this method?
[LG V20 Guides, News, & Discussion] Medec5:
hey guys im trying to figure this out, i read a couple of posts but they were not clear enough for me to figure out what i'm doing. I was able to get back to stock , i want to downgrade from 10.k so i can reinstall twrp and get back to a custom rom. is there a kdz file that i need to acomplish this?
[LG V20 Guides, News, & Discussion] TNG08:
Region problem

Hi guys!

I bought a used h990n 5 days ago and it's baterry is driving me crazy. It drains very fast when the screen is off or even the phone is turned off. Last night I charged it up to 100 and turned the phone off to see what happens. Today I turned it on and it was on 50%.. They advised me to try to to restore it to stock using kdz flash. I followed the link here, found the h990n downloaded it, did everything above, but the lg up stucks at 9% and shows an error code. What should I do?

Thank you!
[LG V20 Guides, News, & Discussion] seanmfield:
Hi guys, I cannot get the device connected to the computer. I have to send it back to LG because the charging port (get this) started to smoke while charging, charred the port and melted the plastic on the bottom of the phone. Legal department says to send it in right away and they will replace it. I need to unroot but this method will only work with a pc. Any ideas?

EDIT***After many efforts I managed to get the device unrooted and the boot loader locked. Thanks!
[LG V20 Guides, News, & Discussion] max1001:
Can i use this method to roll back from 10p? I bought a v20 on ebay and it already had 10p.
[LG V20 Guides, News, & Discussion] jt1998:
No 10p is antirollback
[LG V20 Guides, News, & Discussion] max1001:
I missed the old day of rooting man. Things are just too complicated these day.
[LG V20 Guides, News, & Discussion] max1001:
What's the firmware i need to have to be able to root then? anything lower than 10p?
[LG V20 Guides, News, & Discussion] bryancotton84:
I dont have the "..." under the file path. It's just greyed out with nothing to select. It sees my phone but I cant do anything with LGUP
[LG V20 Guides, News, & Discussion] androfunky:
hello, thank you very much for this topic, I have the V10g-AME-XX version (anti-rollback 0), I can not find the firmware v10c corresponding to the region AME, a person can help me? :(

I tried several times to restore several times with the version twn, but without success, at 9% the flashing stops

here is the message: error code 0X2000 CEFS= initialize

I can not post link and image because I have not posted more than 10 comments, it's a shame
[LG V20 Guides, News, & Discussion] androfunky:
it's good, I have downgraded, thanks to this topic :good:

h tt ps:// xdaforums.com/v20/how-to/v20-kdz-restore-failing-9-completing-fix-t3546817

But, the problem is that now at every boot I get a warning message: Current version is not available for user. can't find matched cust for NTCODE = [FFFFFF,71] ans Current OP name by Buyer-code is [OPEN_AME]. But cannot find matched NT-code mcc/mnc[FFFFFF], subset[71]

can we fix this problem? :confused:

I am a regular user of samsung (I was able to root easily my phones) and I discover LG I am a novice
[LG V20 Guides, News, & Discussion] androfunky:
after some research, it does not matter because as I said before, my phone is international and I flashed with a firmware from Taiwan, I get a warning because the regions do not match, and to fix the problem, it is absolutely necessary that I root, and that's what I'm going to do
[LG V20 Guides, News, & Discussion] gilbertlucas46:
where can I get these files?
[LG V20 Guides, News, & Discussion] jt1998:
OMG - thank you for your helpful post. Lifesaver to say the least. Needed to restore a stock firmware prior to selling my device. Kept getting the error at 9% until I saw your post. It solved the problem immediately. Thank you again for such a useful, informative post!!! SO helpful!!! :good: :highfive:
[LG V20 Guides, News, & Discussion] copymouse:
What if there is no folder common in model, just LGUP_LGNPST folder with LGUP_LGNPST.dll inside, where to copy LGUP_Common.dll?
[LG V20 Guides, News, & Discussion] Silentwidow:
So Upgrade doesn't seem to fix some system files, is there any way to do a full "refurbish" type flash for the V20? I ****ed up some camera files I believe and I'm having a hard time with my cameras.
[LG V20 Guides, News, & Discussion] Taalaay:
why I cant use refurbish mode ?
[LG V20 Guides, News, & Discussion] firstblud:
I can't seem to find the H918 10j kdz download link on http://lg-firmwares.com/category/lg-series/lg-v20/ . I'm trying to downgrade from 10k to 10j. Could someone please share link?

edit: nevermind! oops for some reason mobile site doesn't show firmware links but checked on my desktop and the links are there.
[LG V20 Guides, News, & Discussion] sj420:
H990 Firmware

I understand that you need software security patch before December 2016 to root but I am unable to find original stock firmware for the EU H990. I have scoured the web but unable to find the relevant stock firmware. Any help is great!
[LG V20 Guides, News, & Discussion] devinbidwell:
*CANNOT* restore to factory OS VS995

I have tried everything in this thread to restore my VS995 from LineageOS to stock OS. Every *.dll file I find for the VS995 is useless in LGUP. I get either an unknown model in LGUP or I get an error saying wrong dll for vs99512a. Any help in this matter would be GREATLY appreciated
[LG V20 Guides, News, & Discussion] Ampicillin:
Hello Guys, I wanted to know can I downgrade to 2016 Dec security patch? If I am on F800L, April 2017 patch and F800L10y build?
[LG V20 Guides, News, & Discussion] amirhosseinakb:
how can i backup current stock kernel that lg installed in my phone, please?
[LG V20 Guides, News, & Discussion] alwynjoshy:
Does this method will safe us whatever wrong thing we done to our phone, i mean i am going to try unlock and root so by doing this am i safe if any wrong happens to phone ?
[LG V20 Guides, News, & Discussion] wdcspurs:
Yes. This method is solid and will bail you out of a bind. I actually just got rid of my v20 and used this to reset the phone and get it back to stock out of the box.
[LG V20 Guides, News, & Discussion] hermeez:
G4 gone. new v20 need ROOT!

I' m not sure which files to download from here:

https://lg-firmwares.com/lg-h918tn-firmwares/#more-3864

I am also trying to downgrade to root

Can anybody point me the the right direction?
[LG V20 Guides, News, & Discussion] Ampicillin:
What's your region? What is the last rootable firmware for your device?
[LG V20 Guides, News, & Discussion] hermeez:
This is what I have installed:

Android: 7.0

Patch level: May 1, 2017

Kernel: 3.1831

Build number: NRD90M

Software version: H91810k

Security software version: MDF v2.0 Release 4

I read I need to downgrade to 10j then root or 10i not sure

---------- Post added at 06:53 AM ---------- Previous post was at 06:13 AM ----------

Is the file above from H91810j_00_1216.kdz?
[LG V20 Guides, News, & Discussion] mdl054:
* Removed sorry
[LG V20 Guides, News, & Discussion] :
i'm surprised that it deleted all the data in the internal memory.
[LG V20 Guides, News, & Discussion] kramlar:
I've been gifted a friend's oldV20 (at&t model) here in the UK. I can't get uppercut or LGUP to see the damn phone. My win10 pc sees it though on device manager. Any trouble shooting for phones not connecting,because every guide I've read it just works, I've put it obto com41 as well. Any help would be greatly appreciated
[LG V20 Guides, News, & Discussion] Envinite:
Thank you for this guide.

I managed to turn my bricked V20 US996 that bootloops on that corrupt triangle screen and cant even get into TWRP; works again with flashed stock .kdz

Lost my recovery & root though, but at least it's not a paperweight anymore.

Thank you again, cheers :highfive:

---------- Post added at 03:26 PM ---------- Previous post was at 02:41 PM ----------

Create the 'common' folder where it supposed to be and putt the dll inside it. It works for me.
[LG V20 Guides, News, & Discussion] nat510:
Thank you for this guide.

But is it possible to flash at "Refurbish " mode?

I have "UPGRADE" it many times with 10b/10o/10q,

but it still gets google play/gmail/...... crash errors

soft reset can't fix it and even hard reset
[LG V20 Guides, News, & Discussion] oscarillo:
What dll file did you download for the vs995?
[LG V20 Guides, News, & Discussion] TraderJack:
This may be a silly question, but I'm new to the V20 (VS995). This may also have an overly technical answer, but I'm hoping someone can offer one:

My understanding is that in order to root you need to be running a firmware that has "anti rollback" (ARB) set to 0.

Also, that 13A is the last one that allows this.

I have also read that ARB actually blows fuses in the hardware of the phone to prevent rollback (as the name implies!).

That being said, how is it possible to roll back from anything after 13A successfully if the later versions actually blow the fuses that are supposed to prevent this?

Does ARB not actually work this way on the V20? Did someone find an exploit that gets around this? etc.

thanks.
[LG V20 Guides, News, & Discussion] cnjax:
Some variants have arb others don't, for example the 910 doesn't. You'll have to search your variant. There's a laf exploit for the 918 but may work with your variant just search this forum for that thread
[LG V20 Guides, News, & Discussion] TraderJack:
So is being able to rollback (ARB=0) not really linked to be able to root? Is it just correlated?

IOW - I am told that on the VS995 the latest version you can root is 13A.

Elsewhere I am told that in order to root a firmware it must be ARB=0.

So either:

A) Anything past 13A is ARB=1

B) Anything past 13B is ARB=0

If "A" is true then technically roll back should be impossible, but it isn't because in the OP it shows using LAF (download mode) to successfully roll back on VS995.

If "B" is true then it would appear that the information I was given regarding only being able to root ARB=0 is not true (at least not for my phone).

Based on my search it appears B is most likely the case and therefore something else in releases after 13B is what prevents root, not ARB specifically.

thoughts?
[LG V20 Guides, News, & Discussion] cnjax:
I'm not sure I'd venture a guess that maybe the 995 doesn't have arb being incremented, but as I suggested research this forum
[LG V20 Guides, News, & Discussion] TraderJack:
Let me reword this another way to maybe make it more generic across models.

What specifically has LG/Provider done in later firmwares that prevents root?

ARB just seems to be a way they prevent you from rolling back to an exploitable firmware, but something else in the firmware must seemingly have been implemented to prevent root from working, right?

thanks very much.
[LG V20 Guides, News, & Discussion] cnjax:
LG patched the dirty santa exploit
[LG V20 Guides, News, & Discussion] einsteino:
Any way to restore LS997(SPRINT V20) yet? Someone suggested i flash VS995 Kdz to my LS997 using LGUP. I tried that and LGUP returned an error saying invalid KDZ for LS997

UPDATE

Got it working. made a mistake of selecting UPGRADE in LGUP instead of PATCH DL
[LG V20 Guides, News, & Discussion] Phoenix591:
It's B. The vs995, like all v20 other than the us996, need to use an exploit(dirtysanta usually) to unlock the bootloader and install twrp. The vulnerability allowing dirtysanta was fixed in newer firmware and so creating the need to roll back. Thus far the H918 and LS997 have set ARB to stop rolling back to rootable firmware, though a new exploit was created for the h918 to work around it (and work is being done to apply it to the ls997).
[LG V20 Guides, News, & Discussion] vishuxperia:
I lost my download mode. I can boot into system. Phone is working fine with no issues. Any hope for me.

Lg-h918 t mobile

No root

No twrp

Software 10t

:(
[LG V20 Guides, News, & Discussion] Voloda SVK:
Hi I want to ask. If I can instal stock version. No AT&T!!! rom on LG H910. I heard that H910 H915 H918 are the same phone. If yes what type and rom you recommend. thanks
[LG V20 Guides, News, & Discussion] cnjax:
Check the laf exploit thread

---------- Post added at 05:22 AM ---------- Previous post was at 05:20 AM ----------

If you want a fancy paper weight go right ahead
[LG V20 Guides, News, & Discussion] pureluck9:
So your LS997 is now VS995? are there any issues? can you root it now?
[LG V20 Guides, News, & Discussion] einsteino:
I was able to root via the dirtysanta method but VS995 vibrates for a while on every boot, I didnt like that. So, I flashed my ls997 with a US996 kdz and dirtysanta again. So far I havent had any issues.
[LG V20 Guides, News, & Discussion] martinnick:
VS995

I tried reverting to stock using this method and bricked my phone. Probably should've done a full wipe before trying, but I figured the image would write over everything. I guess I was wrong because now my Verizon LG V20 won't make it past the Verizon screen after flashing the latest KDZ. I've tried reflashing three different versions as well. I also tried using the factory restore from the official recovery as well. I'm sure if I could get it to a state where I could wipe everything, that the flash may take. Any Ideas? The phone just stays stuck at the verizon loading screen. I can get to the official recovery as the flash seems to have wiped TWRP. I can't get to a fastboot mode though.
[LG V20 Guides, News, & Discussion] martinnick:
Nevermind, I just traded it in for the Note 8. It's really too bad. I wanted to wait until the Note 9 was released.
[LG V20 Guides, News, & Discussion] ernestico911:
I rooted my device using this H918 Thread for unlock, now i want to flash stock kdz same V10P or V10T, how can i flash KDZ if i had to change Download Mode for TWRP and now cant enter to download mode?
[LG V20 Guides, News, & Discussion] cnjax:
You'll need to flash your backed up stock laf partition, make sure you have twrp flashed to the recovery partition otherwise you will lose twrp once you restore the laf partition
[LG V20 Guides, News, & Discussion] Electrolite_XYZ:
I own the H990DS but I can't find my firmware even using my IMEI it says

<model>LGABCD</model>

<suffix>XABCXX</suffix>

Can I just flash my firmware and use it for backup?
[LG V20 Guides, News, & Discussion] fralyx:
is DRM keys in LG works the same as the Xperia devices? I'm talking about the stock functionalities that requires the original DRM key
[LG V20 Guides, News, & Discussion] cnoevl21:
im on vs995. go to download mode and after a few seconds it goes to a static screen. ive tried reading what to do about this. People have said to use fastboot to flash the kdz file, but i cant find any instructions on that. Would it be the same as when I used fastboot to install twrp?

Im trying to get my phone back to stock and relock bootloader
[LG V20 Guides, News, & Discussion] cnjax:
You have to use LG Up to flash a kdz
[LG V20 Guides, News, & Discussion] cnoevl21:
I tried, but you need to put your phone into download mode. which i cant do cuz it goes to static screen so LG Up cant read it
[LG V20 Guides, News, & Discussion] guywithouttabeard:
T-Mobile Success w/ unlocked bootloader & fastboot

hey just used this method to downgrade from 10u to 10p with unlocked bootloader and fastboot on my t-mobile h918 and it worked perfectly! Thank you so much for hosting!
[LG V20 Guides, News, & Discussion] Technowizarius:
Using this method to downgrade from 91810u to 10p worked like a charm. Just make sure to do the kdz lgup dll extract and copy/paste from kdz to common folder.
[LG V20 Guides, News, & Discussion] Chinio007:
i have an LG V20 LS997 ZVB can I downgrade this phone using LG UP because i cant unlock it to work on the gsm network from my country please help me...
[LG V20 Guides, News, & Discussion] mustasusi:
Links are dead. Anywhere else we can download?
[LG V20 Guides, News, & Discussion] Phoenix591:
Sorry, ZV7 (it went ZV7 zv8 zv9 zva zvb etc then the version name changed to something else when they released Oreo for it) is the furthest ls997 update that can be downgraded and unlocked. There is basically no (almost zero) chance of a new method of unlocking later ls997 updates coming unless LG increases antirollback for the us996 or a few other incredibly unlikely things happen.

If you try to downgrade to a version that can be unlocked you will brick your phone.
[LG V20 Guides, News, & Discussion] chrishanelloyd:
Hi, After the firmware upgrade, I was prompt with the reboot and the reboot again took me to the firmware upgrade screen which says "now waiting for any connection" then I tried to do the firmware upgrade again but the same thing happens again.
[LG V20 Guides, News, & Discussion] virtualdd:
h t t p s : / / l g - f i r m w a r e s . c o m

start from there. Remove the space in between each character. Choose your phone from the list
[LG V20 Guides, News, & Discussion] userwaldo:
I Confirmed that this process worked on my LG V20 US996 US Cellular to move from US99610h to US99610f.

The one thing I did different was to use UpperCut instead of looking for the dll file.
[LG V20 Guides, News, & Discussion] Bonz:
successfully flash the stock firmware using LGUP on my H990DS. Question is how long is the initial bootup?
[LG V20 Guides, News, & Discussion] pipoyzone88:
help me please

hello is there any available pure stock firmware for LG v20 H910 AT&T?? kindly please help me sir
[LG V20 Guides, News, & Discussion] cnjax:
There are no kdz files for the H910
[LG V20 Guides, News, & Discussion] tech_infinity:
so my device got messed up. I have 990ds and had rooted using dirtysanta. I was running resurrection remix rom. I flashed the kdz file for my variant but now it is just stuck on LG boot logo and I can't access twrp. Any suggestions?

I've tried a couple of firmwares using LGUP but I'm still stuck on lg boot logo every time.