[Tutorial] Crossflash, Bypass OPID Mismatched Error

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fazzy2010

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fazzy2010

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Feb 26, 2019
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LGUP - LM-Q720TS [COM18] 3_21_2023 5_49_34 PM.png
LGUP - LM-Q720TS [COM18] 3_21_2023 5_50_25 PM.png
 

AsItLies

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Nov 4, 2009
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tucson
Samsung Galaxy S10

fazzy2010

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4. Move "LGUP_Common.dll" and "UI_Config.lgl" into "common" folder. Change the attribute of "UI_Config.lgl" to read only.

the above is from the original instructions, how did you miss it? It says, explicitly, to use 'partition download' doesn't it? But you don't have that selection? And it's because you didn't follow the steps, like step 4 above.
hi thank yoou for response so its fine now or do more changes?

common 3_22_2023 11_32_01 AM (2).png
 

Surgemanxx

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Jun 21, 2022
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LG V30
LG G7 ThinQ

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fazzy2010

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You need a better version of LGUP that's for sure which I'm attaching.Your carriers firmware is for Dish Network/Boost Mobile,and there isn't any kdz for that model.I would cross flash it with QM or T-Mobile firmware.You're in the perfect post to know how to do it!

HI STILL SAME THING PLEASE MENTION ME WHAT STEP I AM MISSING?

View attachment 5871287

LGUP - LM-Q720TS [COM5] 3_24_2023 1_26_07 PM.png
LGUP - LM-Q720TS [COM5] 3_24_2023 1_26_40 PM.png


HI STILL SAME THING PLEASE MENTION ME WHAT STEP I AM MISSING?View attachment 5871287
common 3_24_2023 1_29_45 PM (2).png
 
Last edited:

Surgemanxx

Senior Member
Jun 21, 2022
325
129
LG V30
LG G7 ThinQ
HI STILL SAME THING PLEASE MENTION ME WHAT STEP I AM MISSING?

View attachment 5871287

View attachment 5871279View attachment 5871283

HI STILL SAME THING PLEASE MENTION ME WHAT STEP I AM MISSING?View attachment 5871287View attachment 5871421
All that's correct!If you plan on cross flashing to the T-Mobile firmware you need to use Qfil and erase these partitions.FTM,OP_a,Op_b,Modem_a,Modem_b,Sid_a,and Sid_b.Once that's done,exit EDL mode then hold vol + to get back in to download mode.After that you can use the T-Mobile firmware,but flash it with partition download and check all but sid_a and sid_b.Then it will bypass the errors you're getting.
 

fazzy2010

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Feb 26, 2019
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All that's correct!If you plan on cross flashing to the T-Mobile firmware you need to use Qfil and erase these partitions.FTM,OP_a,Op_b,Modem_a,Modem_b,Sid_a,and Sid_b.Once that's done,exit EDL mode then hold vol + to get back in to download mode.After that you can use the T-Mobile firmware,but flash it with partition download and check all but sid_a and sid_b.Then it will bypass the errors you're getting.
hi yea i am trying to follow this step too
use Qfile but the thing is i am trying to do phone on EDL Mode but it’s not going through it’s rebooting again and again only they going
three ways 1 download mode 2 reset option 3 Imei option
 

micallan_17

Senior Member
Sep 27, 2012
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118
Santa Elena
hi yea i am trying to follow this step too
use Qfile but the thing is i am trying to do phone on EDL Mode but it’s not going through it’s rebooting again and again only they going
three ways 1 download mode 2 reset option 3 Imei option
I have an ATT Stylo 5 in the same situation, the thing is i was never able to get the correct firehose file for this device, the way to put this device in EDL mode, you have to short 2 test points on the motherboard, but that only gets you half way as mentioned, i never was able to get the correct/working firehose for this device. i will upload a picture of the test points in a few.
 
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fazzy2010

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Feb 26, 2019
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look here is some info you get same error?
Computer Management 3_28_2023 5_01_21 PM.png
 

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fazzy2010

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The 8150 firehose won't work for the Stylo 5.The Stylo 5 has a sdm450 chipset,and you need to find the proper firehose before you can do anything with Qfil.You can try this one,but I highly doubt it will work.
ok let me see tomorrow and i will update sorry for Inconvenient but definitely i will try tomorrow =) thanx for help
 

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  • 2
    Thanks, this worked.
    Where can i get a europaen firmware?
    Or can i flash G8s LMG810 firmware instead?
    The G8s is the European variant of the G8,and I can't say for sure how well it will work on a G8 Verizon variant.I own the G8x,which is AT&T branded.You can give it a shot,but personally I would go with the G820QM open firmware.All variants of the firmware can be found at the link below.

    1
    Hello
    i have a G820UM Verizon.
    can i cross flash it?
    Sure!Pick your firmware and go!
    1
    Qfil worked but when i try too flash it with lgup, it crashes at 4%.
    Dll file and lgupconfig file are installed.

    Now i have bootloop.
    Use this version of LGUP and give it a try!Delete any previous versions!
    1
    With 820qm Open , Volte will work in Germany?
    1
    These should give you a solid backup!Just modify your port number of choice.

    Spoiler
    LUN 0
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN0_Complete.bin --start_sector=0 --lun=0 --num_sectors=4068999 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN1
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN1_Complete.bin --start_sector=0 --lun=1 --num_sectors=2043 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN2
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN2_Complete.bin --start_sector=0 --lun=2 --num_sectors=2043 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN3
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN3_Complete.bin --start_sector=0 --lun=3 --num_sectors=2048 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN4
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN4_Complete.bin --start_sector=0 --lun=4 --num_sectors=383995 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN5
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN5_Complete.bin --start_sector=0 --lun=5 --num_sectors=3067 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN6
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN6_Complete.bin --start_sector=0 --lun=6 --num_sectors=1024 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    By the way,these are for the U.S. G8x which I own.I changed LUN 0 to match your partition list.Here's my list for the G8x U.S. variant as well.

    LUN 0
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN0_Complete.bin --start_sector=0 --lun=0 --num_sectors=4863623 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN1
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN1_Complete.bin --start_sector=0 --lun=1 --num_sectors=2043 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN2
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN2_Complete.bin --start_sector=0 --lun=2 --num_sectors=2043 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN3
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN3_Complete.bin --start_sector=0 --lun=3 --num_sectors=2048 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN4
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN4_Complete.bin --start_sector=0 --lun=4 --num_sectors=383995 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN5
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN5_Complete.bin --start_sector=0 --lun=5 --num_sectors=3067 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs

    LUN6
    fh_loader.exe --port=\\.\COM16 --convertprogram2read --sendimage=LUN6_Complete.bin --start_sector=0 --lun=6 --num_sectors=1024 --noprompt --showpercentagecomplete --zlpawarehost=1 --memoryname=ufs
    Thanks a lot. Much appreciated.
    I hope I can cross flash now :)
    Will Update you.
  • 53
    Hi there ;)
    Thanks to all other guys here who have made helpful development to tame this beautiful =)

    To crossflash models other than LG G8 please read post 3.
    Before asking any question please read the troubleshooting section at the bottom of the page.
    If you still need some specific help I would appreciate if you bring it up just in the thread instead of sending direct messages.


    LG has made things difficult in flashing custom and even stock roms by this new OPID thing! It prevents us from crossflashing but we have been able to use TWRP and change the system and some other partitions to have a different rom. We had to make some changes into OP partition using HxD editor.
    But now, through this tutorial, we're able to flash any rom without the need to change OPID in OP partition. Also, there is no need to root or unlock boot-loader.
    I was successful to do this on some G8 (LMG820UM) but I AM NOT RESPONSIBLE FOR ANY HARM TO YOUR PHONE!

    By continuing to read the following instructions you are actually accepting the risk.


    IMPORTANT!
    first, MAKE A FULL BACKUP OF ALL PARTITIONS; and I mean it!!!
    at least, for your sake, make a backup of "modemst1, modemst2, fsg, fsc, ftm" partitions, for emergency.


    Requirements
    QPST and Qualcomm USB Driver (get)
    LGE SM8150 Firehose (get)
    LGUP 1.16.0.3 (get)
    LGUP_Common.dll (get)
    UI_Config.lgl (get)
    LG Mobile Driver 4.4.2 (get)


    Preparation
    1. Install QPST and Qualcomm USB Driver.
    2. Install LGUP.
    3. Find the folder named "model" in the installation directory of LGUP, then Create a folder named "common" in the "model" folder.
    4. Move "LGUP_Common.dll" and "UI_Config.lgl" into "common" folder. Change the attribute of "UI_Config.lgl" to read only.
    5. Install LG Mobile Driver 4.4.2.


    Steps
    A)
    1. Open QFIL.
    2. Change "Storage Type" to UFS.
    3. Select "Flat Build".
    4. Browse for "LGE SM8150 Firehose" and pick it.
    5. Now, connect the phone to PC and boot into EDL mode.
    6. Open "Select Port" and select the phone, press OK.
    7. In "Tools" open the "Partition Manager".

    B)
    !!!BE CAREFUL TO DO EXACTLY AS THE INSTRUCTIONS SAY OR YOU WILL BRICK THE PHONE!!!
    1. Make a backup of and erase these 7 partitions: FTM, Modem_A, Modem_B, SID_A, SID_B, OP_A, OP_B.
    1.1. You have to left-click on a partition then right-click on it and select "Manage Partition Data".
    1.2. In the pop-up window, you have 4 choices: I. Erase (to erase data on the partition), II. Read Data (to dump or back up the partition), III. Load Image (to restore the partition), IV. Close (to close the window).
    1.3. First dump/back up the partition by choosing "Read Data" then Erase it.
    2. Close the "Partition Manager" window.
    3. Wait for 5 seconds then press Vol- and Power until it restarts.
    3.1. Immediately after rebooting, Release the Vol- and Power buttons and press Vol+ to get into Download Mode.
    Note: Do not let the phone to begin to boot! If it begins to boot, it may regenerate the SID and FTM partitions data and so you need to redo the whole step B.

    C)
    1. Open LGUP.
    2. Pick your favorite KDZ.
    3. Select "PARTITION DL".
    4. Press Start. And a pop-up window will appear. In this window you can select which partitions to be flashed.
    5. Here, uncheck these partitions: SID_A and SID_B. It will make it able to bypass the OPID Mismatched Error.
    6. If you are in Sprint or other platforms you will get the message whether to change the model or not. Of course you know what to do =)

    after completing the process it will boot up in some minutes and before starting the customization it will do one restart. just be patient.


    ERRORS, QUESTIONS, TROUBLESHOOTING
    1. Can I crossflash V50, V60, G8X or other LG devices using this method?
    I did it on V50. Maybe it'll work on your devices maybe won't. There's one way to find out; make backup and give it a try.
    2. SN is gone, zero, etc.
    Restore your original FTM.
    3. I can't get into recovery.
    Restore the original FTM.
    4. I got NT-Code error.
    It's been discussed many times in the thread and some solutions have been presented (such as this one, thanks to @animo214 and this, thanks to @kt-Froggy as well as this one, thanks to @StvOchi ). However, you can ignore it if the phone got network.
    Note: You need to disable verity on the phone in advance otherwise changes in cust_path_mapping.cfg won't be saved.
    5. IMEI is lost, zero, null etc.
    Restore LUN5 partitions. If you have no backup it should be repaired using Octopus box. Go to 16.
    6. I got "permanently locked" error.
    This is because of IMPL lock and you have to restore LUN5 partitions. In case of having no backup you should use Octopus box.
    7. All partitions are deleted accidentally.
    Follow this instructions.
    8. I need to get into PDM mode.
    Unzip and restore the attached PDM to FTM partition. Remember, you need to restore your FTM to get into OS.
    9. Can I use another phone's LUN5 backup?
    NO.
    10. Can I use another phone's FTM backup?
    Yes. All partitions can be restored from another phone's backup except LUN5 partitions.
    11. My phone is stuck in boot-loop.
    Restore the original FTM and if it doesn't help redo the whole crossflash process and use a different KDZ this time.
    12. Which KDZ is the best (for any matter of use)?
    I do not know.
    13. Can I crossflash from any source variant to Korean variant or vice versa?
    Yes it is possible but you may get error on opening stock camera application because of hardware differences. There are some methods to solve the issue which you can search and find them.
    14. Can I downgrade using this method?
    Yes.
    15. I erased partitions (ftm, op_a, op_b, modem_a, modem_b, sid_a, sid_b) but it still does not let me to crossflash.
    Redo the whole process and this time make backup of and erase these partitions too, on both sides A and B: vendor, product, system, boot and userdata. Do not make backup of userdata partition.
    16. How can I write IMEI?
    A) Dump modem_a and create a copy of it. Then open it in UltraISO and remove IMEIPROT files from image folder. Save and restore it in place of modem_a and modem_b partitions.
    B) Make backup of FTM and then flash or restore the PDM file (attached) into your ftm partition. Restart the phone; you'll get into PDM mode.
    C) Open Tutty (attached). Select "Serial" in protocol and the proper port of your phone's modem driver. Click open. To test if you have selected the proper port number type "at" and hit enter it should respond"ok". Type the code at%imei=# (replace # with your IMEI) and hit enter. It doesn't matter you get "error" or "ok" after that, just check if IMEI is written via this code at%imei=?. If IMEI is written so you'll have the right MEID and ESN too.
    D) Restore the original ftm and modem_a in place of modem_a and modem_b. Restart the phone.
    I've already tested this method on V30, V50 and G8. Remember, if the phone has IMPL lock it'll throw "perm. locked" error even if you have written the IMEI.
    17. I have lost GPT files of my LG G8, G8X, G8S, V50, etc. and Qfil partition manager does not show anything in the list.
    You need to flash GPT files to your device with fh_loader (see this, part C). For that matter use KDZ_Tools to Extract DZ from a KDZ of your device. Then extract the DZ using -c at the end of extracting command. For example: unkdz -f FILE_NAME.kdz -c. It will extract all files besides all GPTs.
    18. Which are the LUN5 partitions?
    SM8150 has 7 physical partitions known as LUNs which are numbered from 0 to 6. Each LUN is split into several partitions. In Qfil Partition Manager you can see all partitions except those of LUN3 and LUN6 which are hidden. The number of LUNs are shown under the first column named LUN. Therefore, all partitions in front of number 5 are LUN5 partitions.
    5
    Some pictures of flashing my LMG820UM, unlocked from Sprint, into OPEN_CA 20j. In normal mode you cannot flash SPR_US to OPEN_CA which is shown in the pictures. But using this thread instruction it allows to flash, even it asks to change the model from SPR_US to OPEN_CA :D
    Until performing the instructions, it shows the "id: 2(SPR_US)" on the Download Mode screen, but after that it cannot recognize the phone model id and shows "id: 0()" :D
    Have fun ^_^
    5
    First off, big THANKS to the OP (netmsm) and other people who contributed to this thread and made this guide very clear and useful!

    So, after perusing this thread for a long time, trying to understand the ins and outs of the process and any possible snafus, I decided to take the plunge after the Open_CA A12 (40a) got released recently, and to flash it onto my G8 originally from US Cellular. The crossflash went smoothly with no issues at all. A nice surprise was that the BL remained unlocked - I was prepared to go through the whole unlocking process again before rooting, but didn't have to. I got the empty S/N (easy fix), and the infamous NT-Code error. This is where I got stuck for a while. I tried fixing it by editing the cust_path_mapping.cfg file as suggested in the thread. The problem is that I couldn't save the changes in that stupid file by using ANY root explorer/editor! :mad: Tried half a dozen different apps with no luck at all. BTW, anyone has any ideas what I may have been doing wrong?? Yes, I am properly rooted with Magisk.

    Anyway... Everything worked fine on the phone, but that lame error was really getting under my skin - I could have ignored it, but I hated not being able to get rid of it. So... After more reading, I came across some info on hex-editing the FTM partition (in a totally unrelated topic). The NT-Code in FTM binary is stored at the offset 00014000. My error message was referring to the code "FFFFFF,85". The original cust_path_mapping.cfg file (which I couldn't edit) had a line referring to "FFFFFF,82". So, having all backups available, I decided, just for the heck of it, to change the last digits of the NT-Code in the FTM partition to match the "82" listed in the file. What could go wrong? I can always restore a backup... After flashing the edited FTM in QFIL, rebooted the phone, and - bingo! The NT-Code error was gone, and the phone was still fully functional. This was my happy face after spending a good hour and a half trying to get rid of it, and finally succeeding: 😁

    Cheers, and thanks again for all the info!
    Thanks, netmsm and kt-froggy for the guides.
    I figured out how to remove the NT code error without root.
    You will first need a file manager that can access the root directory.
    I personally used "Solid Explorer File Manager" to access the cust_path_mapping.cfg file to read the NT-Code that came with the firmware.
    You can use the Solid Explorer File Manager to access the root directory by going to settings then scrolling down and checking the box "show root storage". You will now be able to access the root storage.
    You can access the cust_path_mapping.cfg by going to root/system/product/OP. Then open the file and note the code. Mine was FFFFFF,82=/product/OP.
    Create a backup of the FTM partition the open the FTM file with HxD app. (Make sure you have a copy of the FTM file in case something goes wrong)
    Go to line 00014000 and edit the line. depending on the phone, edit the first 2 sets of numbers/letters with 3 characters separated by a comma. ("FFF,FFF), then the last set of numbers/letters with 2 characters to match the code in the cust_path_mapping.cfg file.
    (Mine was
    "2","310,120,FFFFFFFF,FFFFFFFF,FF","312,530,FFFFFFFF,FFFFFFFF,FF" and I changed to
    "2","FFF,FFF,FFFFFFFF,FFFFFFFF,82","FFF,FFF,FFFFFFFF,FFFFFFFF,82") because I was getting NT code error
    310120, 312530 ; FF, FF

    Note:
    1. The line could span from 00014000 to 00014040 like mine. Each line is separated with "". I had 2 lines and had to change both lines. You can have only 1 line
    2. Make sure you don't delete the line but just select the content and overwrite it with new text. deleting might affect other lines below with content. ( I deleted some lines and my phone factory reset)


    After that just save the FTM and load it to your phone using QFIL and the error will be gone.

    I've only tested it on my LG G8, OPEN CA firmware so I'm not sure if it will work on others.
    5
    Hey good for you, so the Open a11 must be the Kor version right? Either way, could u do a big favor and try to get to recovery? Of course don't erase anything, but just verify you can get to the recovery screen?

    thnx!

    So, we just got this sorted. Thanks to SGMarkus as he mentioned it's the ftm partition that controls recovery access and fastboot access. So, with the newly flashed kdz, as it is, you can't even get to fasboot although u flashed the eng abl to it.

    But! Restore your old ftm, after flashing, and then you'll get access to both recovery and ability to get to fastboot after flashing eng abl.

    cheers!
    4
    First off, big THANKS to the OP (netmsm) and other people who contributed to this thread and made this guide very clear and useful!

    So, after perusing this thread for a long time, trying to understand the ins and outs of the process and any possible snafus, I decided to take the plunge after the Open_CA A12 (40a) got released recently, and to flash it onto my G8 originally from US Cellular. The crossflash went smoothly with no issues at all. A nice surprise was that the BL remained unlocked - I was prepared to go through the whole unlocking process again before rooting, but didn't have to. I got the empty S/N (easy fix), and the infamous NT-Code error. This is where I got stuck for a while. I tried fixing it by editing the cust_path_mapping.cfg file as suggested in the thread. The problem is that I couldn't save the changes in that stupid file by using ANY root explorer/editor! :mad: Tried half a dozen different apps with no luck at all. BTW, anyone has any ideas what I may have been doing wrong?? Yes, I am properly rooted with Magisk.

    Anyway... Everything worked fine on the phone, but that lame error was really getting under my skin - I could have ignored it, but I hated not being able to get rid of it. So... After more reading, I came across some info on hex-editing the FTM partition (in a totally unrelated topic). The NT-Code in FTM binary is stored at the offset 00014000. My error message was referring to the code "FFFFFF,85". The original cust_path_mapping.cfg file (which I couldn't edit) had a line referring to "FFFFFF,82". So, having all backups available, I decided, just for the heck of it, to change the last digits of the NT-Code in the FTM partition to match the "82" listed in the file. What could go wrong? I can always restore a backup... After flashing the edited FTM in QFIL, rebooted the phone, and - bingo! The NT-Code error was gone, and the phone was still fully functional. This was my happy face after spending a good hour and a half trying to get rid of it, and finally succeeding: 😁

    Cheers, and thanks again for all the info!