[Tutorial] Crossflash, Bypass OPID Mismatched Error

[kt-Froggy]

Unfortunately it doesn't work for me. When I load the edited FTM the NT-code no longer exists but my phone cannot connect to cellular network. Any ideas?

No ideas, sorry. Like I said, it was just a "why not?" kind of thought which worked for me...

 

[gmangrove]

I need to do this for an AT&T unlocked G8X. I am in the UK and don't know what firmware to pick.
This one works apparently http://lg-roms.com/lg-firmware/lmg850um/g850um30a/12316 but it is only Android 11.
I would like to use this one: which is android 12: http://lg-roms.com/lg-firmware/lmg850um/g850um40b/13038

Would this be suitable and is a canadian Rom ok for the UK? Thanks!

 

[zfk110]

Restart the phone by pressing and holding power and vol- buttons for about 10-15 secs.

Im getting error 0x6004

I tried Edit: I backed up and erased these partitions in addition: boot_a, boot_b, vendor_a, vendor_b, product_a, product_b and it seemed to work afterwards. this too still didnt work

what I had happened to me, I unlocked the bootloader first then I got twrp with magisk running then I wanted to upgrade to 12 and now I can;t do it

by mistake I also flashed verizon kdz on it too, since mine is sprint, please help

 

[netmsm]

Im getting error 0x6004

I tried Edit: I backed up and erased these partitions in addition: boot_a, boot_b, vendor_a, vendor_b, product_a, product_b and it seemed to work afterwards. this too still didnt work

what I had happened to me, I unlocked the bootloader first then I got twrp with magisk running then I wanted to upgrade to 12 and now I can;t do it

by mistake I also flashed verizon kdz on it too, since mine is sprint, please help

I do not understand what your problem is, sorry.

 

[zfk110]

I do not understand what your problem is, sorry.

I bought this LG v50 and it is a Sprint phone I use the guide to root and unlock the bootloader for the TWRP and magisk while running on Android 11

On telegram I found Android 13 running rom I was told to upgrade to Android 12 and then flash the rom because it will not work with Android 11

I found your post and I was trying to cross flash from Android 11 to 12 using your method but I could not do it because I was getting that 0x60004 error about on your same post people suggest if I erase boot vendor product partition as well that I will not come I try that too and it didn't work I was still getting that same error I try different LG up

Someone told me on the telegram group just flash Android 12 kdz on it since I could not cross flash from 11:00 to 12:00 using your method

Without realizing that I had Sprint I used Verizon Android 12 kdz using LG up

Now when I try to boot up it just flashed lgv 50 logo and goes into the boot loop

I can still go into edl mode also I can go to download mode and I try to use unbrick guide to flash those files manually and after doing that phone does the same thing it would not boot just goes to the boot loop

So this is the situation I'm in

 

[netmsm]

I bought this LG v50 and it is a Sprint phone I use the guide to root and unlock the bootloader for the TWRP and magisk while running on Android 11

On telegram I found Android 13 running rom I was told to upgrade to Android 12 and then flash the rom because it will not work with Android 11

I found your post and I was trying to cross flash from Android 11 to 12 using your method but I could not do it because I was getting that 0x60004 error about on your same post people suggest if I erase boot vendor product partition as well that I will not come I try that too and it didn't work I was still getting that same error I try different LG up

Someone told me on the telegram group just flash Android 12 kdz on it since I could not cross flash from 11:00 to 12:00 using your method

Without realizing that I had Sprint I used Verizon Android 12 kdz using LG up

Now when I try to boot up it just flashed lgv 50 logo and goes into the boot loop

I can still go into edl mode also I can go to download mode and I try to use unbrick guide to flash those files manually and after doing that phone does the same thing it would not boot just goes to the boot loop

So this is the situation I'm in

1. Make a backup of LUN5 partitions.
2. Restore original FTM; If it still does not boot properly then you have to try another different KDZ.

 

[zfk110]

Hi =)
LUN5 contains modemst1, modemst2, fsg and fsc.

Since on a Sprint v50 I flash Verizon kdz when I'm trying to cross flash this is the error I'm getting, what should I do to change the model to Sprint and then try to cross flash, because no matter what I do it would not let me flash it and I don't have any other way to boot the phone all the way I'm still stuck in the reboot loop, what other kdz I can flash on this Sprint V50? I tried Verizon one and thats what got me in trouble

 

[netmsm]

Since on a Sprint v50 I flash Verizon kdz when I'm trying to cross flash this is the error I'm getting, what should I do to change the model to Sprint and then try to cross flash, because no matter what I do it would not let me flash it and I don't have any other way to boot the phone all the way I'm still stuck in the reboot loop, what other kdz I can flash on this Sprint V50? I tried Verizon one and thats what got me in trouble

If you are doing exactly as the instructions say and still getting this error then there's almost nothing more I can suggest.

 

[tofik33`]

No ideas, sorry. Like I said, it was just a "why not?" kind of thought which worked for me...

I've managed to fix it. No nt-code error anymore.

 

[StvOchi]

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! 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.

 

[rvp_178]

After cross flashed
I got my device uncertificated in the google play protect so I can't use netflix or google wallet
Does anybody know how to fix this ?

 

[bmportillo5]

Hello. Thanks for your guide. I ran into a problem: after I made the back-ups and erased the partitions mentioned in the main post, the phone booted into fastboot mode and I couldn't flash the new Android because it gave me a "Not allow to change device" error in LGUP. How can I restore the partitions if the phone won't boot?<

Nevermind, got it working. I'll update this comment after my brother tests it for some time. Thank you!

 

[StvOchi]

After cross flashed
I got my device uncertificated in the google play protect so I can't use netflix or google wallet
Does anybody know how to fix this ?

Your bootloader is unlocked. You have to relock it. There are some other ways to bypass this but I haven't tried.

 

[kt-Froggy]

Your bootloader is unlocked. You have to relock it. There are some other ways to bypass this but I haven't tried.

Hmm... I have not seen an unlocked BL cause problems with Play Protect. My G8 is crossflashed and rooted with unlocked BL, and is still certified. Same thing was with my previous phone.

 

[AAMIRALI034838]

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 time 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, userdata and boot.
16. How can I write IMEI?
A) Dump the 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.

 

[AAMIRALI034838]

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 time 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, userdata and boot.
16. How can I write IMEI?
A) Dump the 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.

SIR I DID NOT FIND OP_A AND OP_B FILE IN QFIL

 

[netmsm]

SIR I DID NOT FIND OP_A AND OP_B FILE IN QFIL

Try harder please. It's impossible for them not to be there.

 

[AAMIRALI034838]

Try harder please. It's impossible for them not to be there.

i am using 901l japnese version..so plz need your help

 

[AAMIRALI034838]

Try harder please. It's impossible for them not to be there.

whenever i flash via lg up it says wrong image......since there is no rom availble for lg g8x japnese version

 

[netmsm]

whenever i flash via lg up it says wrong image......since there is no rom availble for lg g8x japnese version

First of all, create a full backup of all partitions using Qfil.
Then read the guide completely and go for crossflashing.