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#Solution# Flashed Wrong Model Rom To D852.

So Long Story,
Monday November 24, I Changed Out Battery Go To Restart Phone, Phone Wont Boot Stuck On LG Screens And Constantly Retrying. Tuesday Night November 25, I ReInstall Factory Firmware For G3 D852 – With Success – Phone Working. Wednesday November 26, I Decide To Root & Install TWRP – With Success – Phone Working No Issues. Friday November 28, This Is Where Sh*t Hits The Fan! I Get Crazy & Attempt To Install ChupaChups Lollipop Rom With TWRP – Seemingly Successful Install But After Reboot Wont Boot Stuck In Fast Boot. So I Attempt To Resolve This Following Other Forum Posts Using FastBootOV – WITHOUT Success – Now When Attempting To Boot Phone LG Screen Comes Up Top Left Corner Says “ERROR Boot Certification Verify” Below That Says “590 Secure Booting ERROR!” Then Black Screen With Flashing Red & Blue LED. I Attempted To ReInstall Factory Firmware For D852 With LG Flashtool Attempt Fails Stating Wrong Model Number – Phone States On Screen Near Bottom Now D855 Ver5.0 Below That D85520A.
Finally Success With Phone December 28, After Countless Hours Trying to Find Some Shred Of Info To Resolve This Including Posting Here For Help Without A Response. I Proceed To Attempt To Reinstall Factory Firmware For D852 - Failed Same Result Wrong Model Number D855. Actual Model D852. I Then Decided F**K It Ill Install D855 Factory 32G Firmware UK Version Why Not? At This Point Phones A Paper Weight In This Time Had To Purchase Another Phone (So I Dont Lose My Mind) - All Available Information Points To Send In For Warranty. So I Do So Again Attempting To Install The D855 UK Firmware Failed To Install Using LG FlashTool, This Time Stating Partition Errors. So I Find After Random Searching & Random Reading Of Everything LG G3. I Find A Generic LG G3 DLL File (LGUP_8974.DLL). Using The Generic LG G3 DLL & Factory Firmware D852 With LG FlashTool - This Time Working Up To 89%, Phone Reboots Shows Large 2, Crossing My Fingers Waiting For The Large 3. What Actually Pops Up Is A Large 0. I Attempt To Reboot Phone Goes To Mini OS, Set Phone To Reboot Normally - AND SUCCESS!!!!!! Factory OS Boots Up, The Usual YADAYADA Setup.
So Thats All, A Long Winded Story BUT Now There Seems To A Cure To Flashing WRONG Model G3 Roms To Your Device.
Hope This Works For Everyone - I Have Devoted Coutless Hours Trying to Avoid Sending My Phone In.
Good Luck!!
I Am Unable To Post Download Link For Generic DLL File Since I Am A New Member.

I did the exact same mistake with my D852 and my LG G3 says my phone is a D855 in the firmware update, I will try this out and hopefully it works!!!!

[email protected] said:
So Long Story,
Monday November 24, I Changed Out Battery Go To Restart Phone, Phone Wont Boot Stuck On LG Screens And Constantly Retrying. Tuesday Night November 25, I ReInstall Factory Firmware For G3 D852 – With Success – Phone Working. Wednesday November 26, I Decide To Root & Install TWRP – With Success – Phone Working No Issues. Friday November 28, This Is Where Sh*t Hits The Fan! I Get Crazy & Attempt To Install ChupaChups Lollipop Rom With TWRP – Seemingly Successful Install But After Reboot Wont Boot Stuck In Fast Boot. So I Attempt To Resolve This Following Other Forum Posts Using FastBootOV – WITHOUT Success – Now When Attempting To Boot Phone LG Screen Comes Up Top Left Corner Says “ERROR Boot Certification Verify” Below That Says “590 Secure Booting ERROR!” Then Black Screen With Flashing Red & Blue LED. I Attempted To ReInstall Factory Firmware For D852 With LG Flashtool Attempt Fails Stating Wrong Model Number – Phone States On Screen Near Bottom Now D855 Ver5.0 Below That D85520A.
Finally Success With Phone December 28, After Countless Hours Trying to Find Some Shred Of Info To Resolve This Including Posting Here For Help Without A Response. I Proceed To Attempt To Reinstall Factory Firmware For D852 - Failed Same Result Wrong Model Number D855. Actual Model D852. I Then Decided F**K It Ill Install D855 Factory 32G Firmware UK Version Why Not? At This Point Phones A Paper Weight In This Time Had To Purchase Another Phone (So I Dont Lose My Mind) - All Available Information Points To Send In For Warranty. So I Do So Again Attempting To Install The D855 UK Firmware Failed To Install Using LG FlashTool, This Time Stating Partition Errors. So I Find After Random Searching & Random Reading Of Everything LG G3. I Find A Generic LG G3 DLL File (LGUP_8974.DLL). Using The Generic LG G3 DLL & Factory Firmware D852 With LG FlashTool - This Time Working Up To 89%, Phone Reboots Shows Large 2, Crossing My Fingers Waiting For The Large 3. What Actually Pops Up Is A Large 0. I Attempt To Reboot Phone Goes To Mini OS, Set Phone To Reboot Normally - AND SUCCESS!!!!!! Factory OS Boots Up, The Usual YADAYADA Setup.
So Thats All, A Long Winded Story BUT Now There Seems To A Cure To Flashing WRONG Model G3 Roms To Your Device.
Hope This Works For Everyone - I Have Devoted Coutless Hours Trying to Avoid Sending My Phone In.
Good Luck!!
I Am Unable To Post Download Link For Generic DLL File Since I Am A New Member.
Click to expand...
Click to collapse
Man, this was a long story but I am so glad you have posted this. I always wondered what would happen if I by mistake flash the wrong file (diff model), and now I know. Can you please send me the link to the info and the files, just in case I end up where you were (email: elmspace at gmail dot com), I would appreciate it.

Thanks man. I was just wondering what is going to happen to my LG g3 D856 variant if i flash D855 kdz. Now um not gonna do that. Let's not flash any rom. I successfully rooted and am using D858HK twrp ( yeah D858HK) successfully.

hi hi
hi hi same problem after i want to root the phone my LG G3 D852 my phone stuck on fastboot mode blackscreen ,my pc see it like Android bootloader Interface BUT no other programs see it try lg flash tool or lg repair tool or cmd command nothing they don't see my G3 HELP HELP PLEASE

Sorry for the no response on this problem , got the same problem last year by flashing the d850 rom to a d852 model but this solution is not recommended. It works sometimes (was working with mine but I bring it to LG because the motherboard dies for no reason after one month of use lol) but the installation can go wrong and destroy your motherboard.
Envoyé de mon LG-D852 avec XDA Forums Pro.

Holy hell I ran into the same issue and spent countless hours getting my D852 back to life after flashing the wrong ROM. I found this and sure enough it came back!

plss help
sarktheshark said:
I did the exact same mistake with my D852 and my LG G3 says my phone is a D855 in the firmware update, I will try this out and hopefully it works!!!!
Click to expand...
Click to collapse
i tried custom rom cloudt g3 but insted of f400s i installed d855 now its stuck in fastboot plss help
:crying:

This is nice solution.
Many users will thanks...
?
Sent from my LG-D855 using Tapatalk

[Q] LG G3: Flashing Stock Firmware - Errors

My Question: What Am I Doing Wrong?
The Problem:
Yesterday I decided I wanted to Install MIUI 5 on my LG G3 (AT&T, D850). Not realizing that MIUI Doesn't suppport my phone's variant (D850), I proceeded to accidentally install the International version on my phone. (Which is model D855 and Replaced my kernel with the International variant.) When I tried booting it up, all i got was 10 Minutes of the "LG" logo, then a Kernel Panic.
Not worrying about it too much, I knew i had all the tools necessary to Re-Flash stock Firmware.
Wrong.
When I tried re-installing the D850 firmware, I got "Download Failed."
Still not too worried, I decided to download the International Version .tot file, and try flashing that.
This time I got further, but After it reached 6%, I got "Download Failed" again because of a "Partition Change Fa..." (It's cut off, But i'm assuming that last word is 'Fail')
((This "Download Failed" came just after "LAF: Bin_User_mode", If that helps in any way.))
I have no idea what to do. I tried uisng the .kdz Method also, but It failed and then I realized that I was using the LG G2's .KDZ File. Is it worth downloading the .KDZ File for the LG G3 and Trying again?
Please Help!
Thanks! :good:

Hi there,
Please wait until mods will move this thread to the device specific forum.
Stand by

I hope somebody can help me.

I have a LG G3 D855 with the marshmallow KDZ flashed with flash tool everything was good and had no problems. Two weeks ago i rooted my phone and the next day i wanted to install Xposed and after searching for a bit i installed it and got stuck in the bootloop. I managed to recover it by using the .tot method and since then my phone is messed up, like when im using it it restart for no reason at all, or just when it restarts i unlock it and 6/10 times it restarts again. I don't know what's wrong with it and i was hoping someone knows what to do since this is very anoying Thank you
On i've asked for help on Reddit, but maybe someone here knows a solution for it. I really don't know what to do anymore.

Hello,
do you want to backup your app data? Easiest way is flash KDZ via flash tool with CSE flash (format all).

LG G3 D855 Signal Problem + Cust Error

Hello everyone,
I own a LG G3 D855 and recently I've bricked it. What I wanted to do was to flash official ROM (V30N) with LG Flash Tool 2014 back because I've had LineageOS and it had some bugs. Before Lineage OS there was V30N EUR and everything was working without problems.
The flashing process had problems, it was taking too long. It went to 4% in 30min and then it went to back to 3%. I knew there was no way it will finish so I've unplugged the device and tried to flash again but it didn't boot into Download Mode anymore. The device was turning on with a message: boot verification fail! cause: mismatch_sig_len.
To fix it I've followed this tutorial: https://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
But somehow my IMEI was gone so I fixed it using this tutorial: https://www.youtube.com/watch?v=y2lHFy7AciE&t=472s
(used the IMEI from the back of my phone)
So now this is the PROBLEM:
Everytime I flash V30N i get cust error at start. If I flash V30B global there are no problems with cust BUT:
No matter which one Im using my signal drops every time, especially when I turn my data ON or OFF. Sometimes the phone shows X on top of the signal bar and there is no service or it's endlessly searching for network. If I reboot it the signal is ok for a while.
Now what can I really do? Is there a way to rewrite EVERYTHING with a EUR TOT ROM? I'm downloading TOT files from here: http://storagecow.eu/index.php?dir=Xda/LG+G3/Stock/
Thank you, any idea is highly apreciated.
Note: The SIM is OK.
Note2: I've flashed with BoardDiag V10e and V10a, same problem.

im having the same problem. hope you can help me when you find a way to fix this. Thanks!

LG G3 Back from the dead (was hard bricked) - Need help to start over now

Hey guys
First, a little bit of history:
I own a G6 now, so I wanted to have some fun with my G3.
I rooted it (LGOneClickRoot), installed TWRP, installed LineageOS 14.1 and everything went pretty well.
The problem was that LineageOS 14.1 is terrible, huge lags, tons of bugs, so I tried installing another ROM through TWRP, I don't know what I messed up but I messed up and the flash failed. I dont remember exactly what I tried to flash after that but I failed again and then classic --> Stucked on LG boot logo, no recovery mode, no download mode, nothing.
So I used the popular fix for hardbricked G3, creating a short between test point and ground while connecting it to revive him, and it worked. I went with the whole procedure in BoardDialg and stuff. Kinda surprised by myself that I didnt go full-panic mode creating tons of threads everywhere lol, I managed to make it work even if it took me something like half a day of learning and work.
Now I'm back to stock Android 4.4.2, rooted with LGOneClickRoot again and everything is fine.
I mean... Almost everything is fine, because now I want to be able to install Magisk, and I found that Magisk is for Android 5+.
So there are some informations I need to gather before going further and risk a brick again (please no more short on the motherboard lol):
1- Can I flash a stock Lollipop ROM with LG Flash Tool in download mode using CSE Flash ? Is it a proper way to do it or do I really need to go through this boring TWRP recovery flashing again ?
2- where can I find such a ROM (stock Lollipop for d855) ? And which version to chose ? v20a, v20e, v20f, v20h, v20i, v20p, v20t, v20u, v20w or v21a ? I've been looking for hours now, hard to find reliable informations about all different versions.
Thanks for the read, I hope someone can help me

UPDATE:
I flashed a Lollipop v20f with LG Flash Tool and it's working fine.
I heard that after v20f, newer versions were "harder" to root so I sticked with v20f.
I'm gonna play around with Magisk now and see how it goes.

I'm in the same boat. I also went back to 4.4.2 via TOT. The I rooted and installed TWRP. how I want to restorel my RR 5.8.5 from a TWRP backup. My question is to I have to install the 35B bootstack before or after the restore or at all?

Hi,
Upgrade (LGFlashtool + CSE flash) to V30B
Follow this post ==>
https://forum.xda-developers.com/lg-g3/general/root-twrp-marshmallow-d855-30b-t3286268
Then you can install custom Rom ou upgrade to stock V30N (with root : there is a post about it)

Hey how did you do the unbrick process? I stuck at flashing kdz eventhough i have correct dll and drivers installed

hi,
Try LGUP instead of LGFlashtool (download mode and type *.kdz + select kdz file in LGUP)

Depends if you're hardbricked or softbricked. I was hardbricked so I had to create a bridge between 2 points on the motherboard and reflash everything one by one. I formated recently and didnt keep all these things but I can get into it again to try to help you.
EDIT: LGFlashTool isn't enough if you're hardbricked, you'll have to use other tools and open your phone. First step is identify if you're softbricked or hardbricked, google it you'll find your answer

Mine was hardbricked. I use shorting test point method and successfully flashing partition. Then I flash kdz using LG flash tool 2014, my phone stuck on boot logo. Then I do factory reset. Still same. Last option, I use LG UP. It stuck on LAF info with number on it. Is my LAF file damaged?

Hi,
With Boarddiag try this :
1-EMMC TEST Option "erase" ;
2- then Restore theses partitions and reboot in download mode and flash Kdz.
1)Boot
2)Aboot
3)BackupGpt
4)Boot
5)dbi
6)laf
7)PrimaryGpt
8)Recovery
9)rpm
10)tz
11)sbl1