yashsingh1/xdaforums huggingface dataset:
[LG V20 Guides, News, & Discussion] darwinmach:
I updated the OP with the 10p firmwares. Please read the words of caution before you go flashing the 10p stuff willy-nilly. I have not tested them :D
[LG V20 Guides, News, & Discussion] texasaggie1:
Thanks OP! Those are exactly what I needed and now my stock 10p ROM works like a champ. Can I include them in my post and give you credit or would you rather me just link to your post?
[LG V20 Guides, News, & Discussion] darwinmach:
Would prefer you to link them here. Thanks!
[LG V20 Guides, News, & Discussion] LT1UltraZ:
I can confirm flashing 10p modem will softbrick. Flashing back to older modem does sends you into bootloop. I'm going to try reflashing 10k to see if I can recover.
[LG V20 Guides, News, & Discussion] askermk2000:
Just to be clear. You will HARD Brick the phone if you flash 10p bootloader and then flash back to older version.
[LG V20 Guides, News, & Discussion] storm68:
10p looks to be a nightmare. Grrrrr
[LG V20 Guides, News, & Discussion] Mervingio:
YES GUYS YOURS HAVE BEEN WARNED!!!!!! Inclusive if you are on 10k build NOT FLASH ANY BL from 10d not sure 10j but 10d will HARD BRICK and NO WAY to back your LG V20 to life if yours not have warranty happen to me Tuesday but mine is under warranty yes LG is becoming like Damn Samsung!! :crying:
[LG V20 Guides, News, & Discussion] texasaggie1:
After reading about how previous bootloader and modems BRICK the devices what if I link here and then also link straight to your individual download pages? People would be screwed if they didn't get it exactly right.
[LG V20 Guides, News, & Discussion] Mervingio:
maybe [MENTION=2684188]autoprime[/MENTION] can bring some light here

Edit:

All right guys here some light from [MENTION=2684188]autoprime[/MENTION] from pm

modem and bootstack contain anti-rollback properties. this has been going on since the g4.. nothing new here. https://xdaforums.com/g4/...de-g4-t3197675

anti-rollback version should always be noted in any zips or packages by dev if they want to be responsible. I tag all my bootloader/modem and "rom" zips with ARBxx in the name.

once an updated image has been loaded and run on a device the ARB is burned into a fuse.. this cannot be changed to lower value.. only higher values. so future updates can increase it but nothing can decrease it.

system/boot/recovery do not contain ARB properties.. but most of the other partitions related to bootstack do.
[LG V20 Guides, News, & Discussion] texasaggie1:
That's been my experience with 10p. The system partition seems to not work unless the modem and bootloader are 10P also
[LG V20 Guides, News, & Discussion] dimm0k:
do you know if it's possible to skip updating the partitions related to bootstack so ARB does not come into play?
[LG V20 Guides, News, & Discussion] autoprime:
[MENTION=5687667]dimm0k[/MENTION] yes, ARB CAN be avoided by not flashing the partitions which would blow an ARB (q)fuse. modem and bootstack. Boot, system and recovery (though you'd wanna skip recovery to keep TWRP obviously) would NOT blow a fuse. But sometimes system/boot require the updated modem... or updated bootstack (or both) to work properly. Testing those variables are required to determine that outcome.

but as [MENTION=227408]texasaggie1[/MENTION] has stated above you, it seems the system partition wont work without also installing the bootloader.

I have not read back through this thread.. I am unsure if just the 10p system was flashed or also the 10p boot.img as well. If only 10p system was flashed then perhaps also flashing 10p boot.img (boot.img doesn't have ARB) is needed.

If it has not already been done I would try just system.img... see how that goes. then add the 10p boot.img and see how that goes.

If the outcome that 10p modem and bootstack are required for 10p system to work.. then skipping 10p might be the way to go (unless you wanted to blow a fuse). I'm not sure which V20 model this 10p fuse issue is for and what the unlock/root possibilities are for that model once on 10p.. but if 10p can't be rooted or unlocked without first needing root (tmo) then it would be risky to take that update. Yes, tmobile users could remain unlocked and keep TWRP as long as TWRP was never lost in the process... but lose TWRP and you are stuck. If this is for unlockable devices listed on LG's bootloader unlock developer site then this fuse increase shouldn't matter as you still have bootloader unlock and can fastboot flash TWRP at any time... just don't downgrade to anything lower (and why would you?!). This issue should only be a problem for devices that can't officially be bootloader unlocked without root.. and tmobile devices with "broken" fastboot.
[LG V20 Guides, News, & Discussion] Mervingio:
For me the 10d build modem is 100% better than 10j,10k cant say nothing about 10p because the issue. this is was I back to this modem.

Many Thanks to [MENTION=2684188]autoprime[/MENTION] to stop here and bring some light here before all of us blow ours V20`s so guys brings thanks to him.
[LG V20 Guides, News, & Discussion] texasaggie1:
Thank you for your input AutoPrime. My initial test ROM that I made for myself flashed Boot and system. That created various manifestations of a soft brick because I didn't have the bootloader or modem to flash. I did try flashing a boot image from a 10k rom and that did not seem to help. Based on what you just said that makes sense why. I also tried flashing a 10K ROM and restoring from a 10K backup and that didn't help either and now I know why. Right now I am on 10p everything and it's all working like a champ.
[LG V20 Guides, News, & Discussion] Gungrave223:
Do you need to be on a 10p ROM out with lineage still work?
[LG V20 Guides, News, & Discussion] bilong9:
Need your help

Anyone have a flashable modem for the H915. Please help me
[LG V20 Guides, News, & Discussion] darwinmach:
I believe this only matters if you use an LG-based ROM. AOSP doesn't usually have this restriction.

Unfortunately, I only have firmwares for H918
[LG V20 Guides, News, & Discussion] bilong9:
Please help me

https://lg-firmwares.com/download-file/?fileId=4449
[LG V20 Guides, News, & Discussion] darwinmach:
Sweet - you found a KDZ that isn't encrypted or something like that :D

Here's the H915 10d Modem extracted from that KDZ:

ZIP: https://www.androidfilehost.com/?fid=961840155545589091

SHA-1: aa5d0f1254f56655f545e7f6231371abe2312fd9

I have no way of testing this - you're on your own!
[LG V20 Guides, News, & Discussion] bilong9:
Thank you for let me try I will report the results to you
[LG V20 Guides, News, & Discussion] Mervingio:
BL and MODEM are 10j but I'm on 10d ROM can update to 10k BL and MODEM without HARDBRICK
[LG V20 Guides, News, & Discussion] texasaggie1:
Update: You can go back and forth between 10d and 10k MODEM ONLY because they are Anti roll back 0, not bootloader.

DO NOT TRY TO DOWNGRADE BOOTLOADER EVER. Some are saying this hard bricks too.

10n 10o and 10p are anti roll back 1. Go back to 10d from those and you will hard brick
[LG V20 Guides, News, & Discussion] storm68:
I second this
[LG V20 Guides, News, & Discussion] Mervingio:
On 10k I back to 10d BL and Modem and bye bye V20 but this never happened until past week something is happening but for now I will not touch BL......
[LG V20 Guides, News, & Discussion] thedevilslettucemd:
+1 see below

Fyi I was able to roll my modem back to 10d without issue (was on 10k). However, when I rolled my bootloader back to 10d the phone was hard bricked. 9008 mode in device manager, no screen no logo no nothing. Hopefully nobody else makes this mistake... Now I have to to a tmobile exchange and hope they simply reflash the entire NAND.

so for now DO NOT MESS WITH THE BL VERSION YOU ARE RUNNING!
[LG V20 Guides, News, & Discussion] Mervingio:
Yes NEVER TOUCH BL again [emoji106]
[LG V20 Guides, News, & Discussion] storm68:
That's odd. I've done it way back in the day with no issues at all. But on 10p for sure you can't.
[LG V20 Guides, News, & Discussion] thedevilslettucemd:
Could be an issue with the 10d BL zip as well...
[LG V20 Guides, News, & Discussion] storm68:
Yeah good point.
[LG V20 Guides, News, & Discussion] Mervingio:
Yes i do the same but honestly not sure what the hell happen not sure if was something with TWRP or ROMs but the only way to back BL to 10d is use the KDZ or TOT mine with BL,Modem and Kernel based on 10d not matter if i`m on 10k the speeds are insane plus HD Voice all the time after 10j> updates something has changed and the phone are not the same.

I found the 10d TOT but not no sure how do it I use LGUP for KDZ but TOT last time was with LG Optimus G Pro from att.
[LG V20 Guides, News, & Discussion] texasaggie1:
Dang that's awful. I updated my post to reflect this info. I did this in the past and did not brick

---------- Post added at 01:51 PM ---------- Previous post was at 01:49 PM ----------

Same here. Craziness.

I will say as a general rule for any smart device it's probably not a good idea to try to downgrade bootloader

---------- Post added at 01:52 PM ---------- Previous post was at 01:51 PM ----------

I'm curious.... Have you tried to reinstall with LGUP and a KDZ file?
[LG V20 Guides, News, & Discussion] thedevilslettucemd:
Hard brick. No download mode no fastboot not logo no nothing. It's stuck in 9008 mode (Qualcomm flash).
[LG V20 Guides, News, & Discussion] texasaggie1:
Dang that's awful.
[LG V20 Guides, News, & Discussion] thedevilslettucemd:
Lucky I had 1 week left on my warranty so I set up an exchange with T-Mobile. I'm just going to sell the replacement. I'm pretty much fed up with the pitfalls of the v20 anyway.
[LG V20 Guides, News, & Discussion] anonymoustl:
I request that the OP puts a version check before the zip actually does the flashing(if possible). Or change the naming contexts on each version as to make them look different immediately upon downloading. Being up for days zeroday hunting Windows 10(found 5!!!) mixed with zero version checks, and a package that looks identical to the one right next to it, but is completely different. I accidentally flashed 10k over my 10p and now I am farked. I may be moving on out of this forum after this experience... LG's devices are subpar at best for the cost. And becoming Samsung restrictive. Back to OnePlus if I am totally screwed...

I am just lucky I got the thing for 200 because someone tried to sell it to me then claim a week later it was stolen... Instead I got their account banned, and the IMEI was actually cleared for me!!!!! Seriously!!!!!

Now this...
[LG V20 Guides, News, & Discussion] kenbrownstone:
Guys I flashed 10p modem..Didn't know modems were anti roll back too..But I didn't flash 10p bootloader..what should I do or am I firked too

---------- Post added at 04:48 PM ---------- Previous post was at 04:47 PM ----------

Was having issues with not receiving calls all day today and yesterday so that's why I flashed it ..Never had a device to were I can't flash what modem I want..
[LG V20 Guides, News, & Discussion] HiddenKnight:
Currently on 10k bootloader and modem. Prior versions are non-anti rollback? I am having terrible service even since I bumped to 10k.

So if I understand correctly, I am able to flash a previous modem only, correct?

I had good success on 10j or maybe it was 10d.

Want to confirm that I'm able to interchange modems for better success as long as I don't upgrade to 10p.
[LG V20 Guides, News, & Discussion] kenbrownstone:
make sure before doing cause mine is screwed..
[LG V20 Guides, News, & Discussion] darwinmach:
That is correct. As long as you are not on 10p, you can switch around between 10d <-> 10i <-> 10j <-> 10k

You have very limited options at this point. There are 4 things you MUST do to continue using your phone:

DO NOT DOWNGRADE MODEM OR BOOTLOADER

I repeat, DO NOT DOWNGRADE MODEM OR BOOTLOADER

Find a 10p based ROM, or run AOSP

Update bootloader to 10p (required for the 10p modem that you can't roll back)

DO NOT DOWNGRADE MODEM OR BOOTLOADER

////////////////////////////////////////

I've decided to pull the 10p bootloader and modem links until I can implement a better warning system. 2 things I am currently considering:

Renaming the files with an anti-rollback "tag"

Using AROMA installer to present a warning that you must accept before you can flash 10p

Eventually, I'll replace all the firmwares with one that uses AROMA just in case anyone forgets they are on an anti-rollback and flashes an older modem/bootloader (either purposefully or by accident).

Stay tuned!
[LG V20 Guides, News, & Discussion] HiddenKnight:
I'm not going 10p and will never.

Just asking for confirmation so that I can roll back to anything prior 10k -10d without any repercussions (modem only) - currently 10k modem
[LG V20 Guides, News, & Discussion] kenbrownstone:
Yeah buddy I'm a fkt monkey at this point ..sob.fml..
[LG V20 Guides, News, & Discussion] HiddenKnight:
Thank you for the confirmation, sir. I certainly appreciate that.
[LG V20 Guides, News, & Discussion] texasaggie1:
Can you please post the modem and bootloader for 10Q? If not could you pM them to me please for my debloated rom project?
[LG V20 Guides, News, & Discussion] darwinmach:
Sure, I will upload and PM them to you when I have them prepared :)
[LG V20 Guides, News, & Discussion] PhillyWonka:
10p seems to effect asop installation no matter what asop base rom at least for few people that I know including me that have tried it. When it initially installs and boots up it will show the LG boot screen then the next screen it will be a black screen that turns off and on in a loop . Have you had any luck with asop while after updating to 10p modem and bootloader?
[LG V20 Guides, News, & Discussion] darwinmach:
Check your PM :)

I have not tried AOSP with 10p when I still had the phone - it was a stock-based 10p ROM, so I have no idea. It looks like LG must have done some pretty major changes to the bootloader or modem to warrant an anti-rollback. I'm not sure what though.
[LG V20 Guides, News, & Discussion] JCordero31:
Can i get that bootloader and modem as well?
[LG V20 Guides, News, & Discussion] MidtownHD:
so I can't go back to stock anymore? I have TWRP + root and modem MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1
[LG V20 Guides, News, & Discussion] darwinmach:
You can always go back to stock with a KDZ or TOT. However, the oldest stock version you can go back to if you already have 10p is 10p.
[LG V20 Guides, News, & Discussion] MidtownHD:
Thanks for the clarification.
[LG V20 Guides, News, & Discussion] NJ_RAMS_FAN:
yea, i felt for the anti roll back. brick the v20. I just got the exchange (still had warranty for another month). new phone currently has the 10k.
[LG V20 Guides, News, & Discussion] AVIMPEG:
can You perhaps add This model To your rom

I have aStock version Ready If you need

https://mega.nz/#F!wXxgGDhY!wn9E_00IhigY3m4ddVRaow
[LG V20 Guides, News, & Discussion] Taalaay:
hello, I extract kdz files for different baseband version. i found modem35910.bin in H990TR kdz files. Is this kdz's modem baseband files ? and if answer is yes, how can setup this file on my phone ?
[LG V20 Guides, News, & Discussion] ki11aprime:
Anyone got the link to 10p bootloader?
[LG V20 Guides, News, & Discussion] SJMarty:
I am also looking for the 10p bootloader and modem files.
[LG V20 Guides, News, & Discussion] firstblud:
Is there such a thing as 10r bootloader and modem? or is it the same as 10q (or 10p)?
[LG V20 Guides, News, & Discussion] darwinmach:
If you fully understand that you WILL BRICK YOUR DEVICE if you try to roll back to a modem/bootloader older than 10p, then PM me for the links or browse my AFH folder for it.

Yes, there is - check your PM or my AFH folder
[LG V20 Guides, News, & Discussion] aniketsiriah1:
can i root / flash twrp in my h91810p tmobile

i have bootloader unlocked...
[LG V20 Guides, News, & Discussion] Zacharee1:
Nope.
[LG V20 Guides, News, & Discussion] remarkablecow913:
Hi there. Could you possibly pm me the link for said 10p kdZ. I just got my v20 and it's already updated to 10s. Will 10p still be the farthest back? Or is it q or r nkw?
[LG V20 Guides, News, & Discussion] hibby50:
Is anyone making these somewhere still?
[LG V20 Guides, News, & Discussion] darwinmach:
I'm still making them upon request if KDZ is provided and only if I have the time, as I don't have this device anymore.

Things slowed to a halt early on because people weren't following instructions and then asked that all the firmwares get pulled to keep people from accidentally flashing an incompatible version.

That said, it's actually pretty easy to find the firmware packages I made if you poke around a bit on AFH.

As usual, make sure you know the risks and you're on your own for this.
[LG V20 Guides, News, & Discussion] Mike The Menace:
[/COLOR]

If I'm just flashing the modem zips does it matter what rom/baseband version I'm on? I have a H918 and upgraded to the H91820f stock rooted and my mobile network reception has been terrible - the connection goes in and out, I'm missing calls, texts, etc. So basically I was trying to stay on Oreo but find a stable modem. Any help is much appreciated!

My baseband version is:

MPSS.TH.

2.0.1.c3-00058-M8996FAAAANAZM-1.156374.3.165919.3
[LG V20 Guides, News, & Discussion] Mike The Menace:
Anybody?...
[LG V20 Guides, News, & Discussion] darwinmach:
Baseband = Modem

And the ROM you use matters only if you are using an LG-based ROM - for a complicated reason (if I remember correctly, as I no longer have this phone):

1.) Modems only work within their bootloader's anti-rollback version. Ex: a 10p or newer modem will not work with a 10d bootloader (in my own experience) and similarly a 10p bootloader will probably not work with a 10d modem (haven't tried). Device either enters a bootloop or your wifi/bluetooth/cell is disabled. Easy fix, because you can still boot into TWRP and flash a compatible modem.

2.) LG-based ROMs (perhaps just the kernel), without the appropriate modifications, will not work with a bootloader that has a newer anti-rollback version. Ex: a 10d-based ROM will not likely boot on a device with a 10p or newer bootloader. However, unlike fixing the modem, DO NOT under ANY circumstance, flash a bootloader with an OLDER anti-rollback because this will guarantee a brick!

Tread carefully!!!

I don't have the device anymore so I'm not aware of any anti-rollback versions beyond 10p:

10d, i, j, k are anti-rollback 0

10p is anti-rollback 1

Newer than 10p is at least anti-rollback 1, if not already on anti-rollback 2, I just don't know which is which:

10q, r, s, t, and u
[LG V20 Guides, News, & Discussion] wolf45801:
Anyone know what the latest modem is for how I I'm running 20h stock I dont think I have the latest modem
[LG V20 Guides, News, & Discussion] darwinmach:
20h is the latest for the H918 T-Mobile US, released late NOV 2018. I just didn't make the firmware packages for the 20 series since there doesn't seem to be any demand for them. Also, without the device, I don't currently have an alternate way to check the anti-rollback version information.
[LG V20 Guides, News, & Discussion] wolf45801:
Yeah it's ar1 I did find the 10q modem and flashed it so far so good
[LG V20 Guides, News, & Discussion] Mnementh666:
Just in case you want it, or for future reference... Here's the 20H modern bin file

https://drive.google.com/file/d/1CIj5IJi9Ab0g-KVf2p0aVww8Tzc_gUz7/view?usp=drivesdk
[LG V20 Guides, News, & Discussion] wolf45801:
How do I make the modem.bin into a twrp compatible zip file can I just replace the modem.img inside the modem zip I found already? I'm assuming it should work since a bin file is basically a img file renamed
[LG V20 Guides, News, & Discussion] Mnementh666:
Rename the bin file to img. You can then directly flash it in TWRP under install and choose image.
[LG V20 Guides, News, & Discussion] ragefury32:
Hey [MENTION=909933]darwinmach[/MENTION], I found a few extra bl/modems on your AFH archives. Can I assume that they have been somewhat vetted (tested with reports of good success...I hope)?

So let me just confirm what going through 14 pages of forum text just taught me - as long as you flash the same bl+modem zip files versions together at the same time in TWRP, it should be fine, right?

And if you flash 10p and above, you'll trip ARB from 0 to 1 and can never go back again, and if you do, you must make sure that the ROM uses a 10p (or above) compliant image?

Also, are there consensus regarding which ARB1 firmware is preferable? Good throughput/stability?
[LG V20 Guides, News, & Discussion] darwinmach:
The ones I have all work, provided you only flash a version compatible with your ROM (if you are using stock). Also absolutely DO NOT flash an downgrade ARB versions - your device will turn into a brick with no ability to recover.

Yup - it's exactly that. There are even newer versions of firmware that may have ARB 2 (not in my inventory), but since I don't have the device anymore I can't confirm. Same rules apply - you can't flash an ARB 1 nor ARB 0 over an ARB 2.

Technically you *can* mix and match BL + MODEM within ARB versions, but YMMV. You definitely cannot mix BL + MODEM from different ARB versions. My advice is to keep them paired up - after all, they were released together from the manufacturer.

No idea on this one. I have not solicited/collected feedback on this, but generally the newer firmware fixes bugs or re-tunes the modem for any updates the carrier has made to their network. The version that works best for you will also depend on where you use your phone the most.

Hope this helps!

Some day soon, I might revisit this and finalize the series of firmwares. They will be packaged in the same format as the existing ones. I.e. they will not come with the AROMA installer or some stop-gap to prevent you from making the ARB mistake as I had originally planned since I don't have the time to focus on this device (and I don't have one anymore).

Firmwares WITHOUT BL/MODEM flashables:

Nougat (at least ARB 1): 10q, 10r, 10s, 10t, 10u

Oreo (likely at least ARB 2+): 20f, 20g, 20h
[LG V20 Guides, News, & Discussion] ragefury32:
Thanks for the response and clarification - so if I am on a Nougat build, I should use a 10x series BL/Modem, and anything Oreo and above should be on 20x? I am currently on LineageOS 15 (Oreo based) and ran into odd problems with laggy responses on volume controls, camera controls, stuff like that, and since I am on 10k, it's fairly likely a BL/Modem and Android system version mismatch. So provided that I only flash BL/Modem and leave the /system, /data and the recovery alone, this should not impact the functionality on my phone, right?

I noticed that [MENTION=2881807]x86cpu[/MENTION] segregated the h918 unofficial CM15 builds to pre and post 10p, and if I flash 10p and above it'll effectively make my pre-10p backups useless. This is not something to take lightly, as there is really no turning back.
[LG V20 Guides, News, & Discussion] darwinmach:
Technically anything Nougat should using the 10-series and Oreo and up use the 20-series, but after taking a look at the KDZs from LG, it looks like anything 10p and newer is all anti-rollback v1, so the only very major change (at a very low hardware level) happened when they made 10p where any pre-10p ROMs will definitely not boot. That said, there is very likely big changes from the 10 to 20-series of bootloaded/firmware to support the newer Android Oreo.

I'll be packaging up and releasing links to BL and MODEMs from 10s and up, all way to 20h, which will give everyone a complete collection of everything to date. No time to incorporate any strong protection against accidentally flashing something pre-10p though, so you'll need to be vigilant about what you are flashing.
[LG V20 Guides, News, & Discussion] darwinmach:
OP has been updated with links to all firmware packages from 10d all the way to the most recent KDZ available to me as of posting this (20h). Please, please, please pay attention to the anti-rollback version!

Cheers!