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[Tutorial] Crossflash, Bypass OPID Mismatched Error

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Pypy50

Member
Nov 6, 2021
12
1
l dont have the "PARTITION DL" option to select the partitions to be flashed???
 

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netmsm

Senior Member
Oct 3, 2010
154
82
Esfahan
apparently i followed your tutorial, but i have lost my imei and s/n number, any solution for this?
There's a way to resolve this also that I suggested to others previously. Find all and follow the instruction of how to remove IMEIPROT lock that prevents from writing IMEI.
The only thing I have to add is about modifying NT-Code which is possible only on Korean A11.
 
There's a way to resolve this also that I suggested to others previously. Find all and follow the instruction of how to remove IMEIPROT lock that prevents from writing IMEI.
The only thing I have to add is about modifying NT-Code which is possible only on Korean A11.
do you have any link to the thread? since every method i try requires money. i will be very happy if you send me some instruction/ thread link
p/s: every time i reboot my phone it appears a error like this : "WARING! Current Version Is Not Available To User. Can't Find Matched Carrier. Check NT-CODE: 0" and the screen said that

This Phone Is Permanently Locked and Can Not Be Unlocked​

after pressing cancel, the device said that this phone is carrier locked
 
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netmsm

Senior Member
Oct 3, 2010
154
82
Esfahan
do you have any link to the thread? since every method i try requires money. i will be very happy if you send me some instruction/ thread link
p/s: every time i reboot my phone it appears a error like this : "WARING! Current Version Is Not Available To User. Can't Find Matched Carrier. Check NT-CODE: 0" and the screen said that

This Phone Is Permanently Locked and Can Not Be Unlocked​

after pressing cancel, the device said that this phone is carrier locked
Search in my posts you'll find them.
This error for NT-Code is also curable.
Remember to do all just on Korean A11.
 

lawallet

New member
Jan 13, 2021
1
0
I've followed this guide for flashing a ATT G8X to the CAN one. When I reboot I'm stuck at the LG logo. Is there a fix for this? I also tried deleting sytem,vendor, etc. as well to the same result
 

marahuan

Member
Nov 10, 2020
7
0
Tashkent
Hello everyone! Good job, friend. I successfully flashed my lg v500n lgu to lg v500em. After finishing the flashing process in lgup, without booting into the system, I switched to edl mode, restored the ftm partition, flashed a patched boot from a European. Then I flashed the engineering abl , translated into fastboot, disabled the vbmeta check, restored the native abl. Booted the system, now I have a full-fledged European. I now have root rights, generally satisfied. Thank you. Sorry for my English.
 
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Hello everyone! Good job, friend. I successfully flashed my lg v500n lgu to lg v500em. After finishing the flashing process in lgup, without booting into the system, I switched to edl mode, restored the ftm partition, flashed a patched boot from a European. Then I flashed the engineering abl , translated into fastboot, disabled the vbmeta check, restored the native abl. Booted the system, now I have a full-fledged European. I now have root rights, generally satisfied. Thank you. Sorry for my English.
hi did you face the NT-Code error?
 

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  • 2
    Does anyone have a good source for and OPEN_US firmware for the LG LM850UM?
    I cross-flashed to OPEN_CAN and my IMEI got zeroed.
    All I can find are CAN and MEX NDZ's for this phone.

    This is the link for the US Open kdz. It's a little difficult to find as they are listed under g8 820QM and not 820UM.

    cheers
    2
    I followed all the steps but was impossible for me to get to the menu in lgup with all the options
    Please follow the preparation and change the attribute of "UI_Config.lgl" to read only.
    it flash the lg logo and then disappear for a while... no way to stop it.
    I've experienced that going from a firmware to another faces such issue. I don't know why, but you may better try a different firmware to make phone boot properly. Then go back and try the desired firmware.
    1
    Strongly advise NOT to flash any partition indicating 'data overflow'. Doing that will almost certainly (semi) brick the device as you'll overwrite nearby partition information.

    What's happened is you crossflashed to a rom that has a smaller partition size for the OP. You'll need the partition table for what u originally had, or xflash to a rom that has a bigger OP partition.

    edit: Look at netmsm's guide re fixing hardbrick. He has gpt tables for at&t in there and how to revert to them.

    Also, why are u doing this? Do u just want to sell or is something not working?
    Thanks, I was able to revert the partition table using edl bkerler.

    I made the mistake of crossflashing before I put in the network unlock code. So I needed to revert back to the AT&T version, put in the network unlock code, then I'll crossflash it again. At least that's the plan 🤞
    1
    One question: After successfully loading open_ca on my vrz G820um, can I flash open kdz like normal, or I need to do it like in the tutorial still (unchecking sid on partition dl).
    It does not change the original OPID so you need to do the tutorial for every try.
    Reason: I want to flash system without wiping my phone.
    extract system.img from the KDZ and restore it using QFIL or flash it via fastboot.
    Also: I can't go into recovery mode, even without button combo (hold volume down and power button, release power button one second and press it again without releasing volume down). Any ideas? Already got TWRP and I want to boot into it, but I keep booting normally.
    Recovery is stored in FTM. To get into recovery just restore the original FTM.
    1
    Got it fixed had to use PARTITION.DL check all boxes too and flashed
  • 14
    Hi there ;)
    Thanks to all other guys here who has made helpful development to tame this beautiful =)

    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.
    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 restart.
    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 Spring 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.
    3
    If u don't understand, ask questions, but don't be disparaging. We should all be thankful netmsm even bothered to take the time to write this!
    Thanks friend 🙏👍
    I've benefited from XDA's guides, tools, etc. and I've been always thankful for all their benevolence. I feel obliged to share what I know with others here. This is the manner I was taught in this forum.
    3
    I would like to know the following:
    (1) first, MAKE A FULL BACKUP OF ALL PARTITIONS; and I mean it!!! How, exactly, does one make this full backup? How does it get restored if needed?
    (2) 1. Make a backup of and erase these 5 partitions: FTM, Modem_A, Modem_B, SID_A, SID_B, OP_A, OP_B. What does this mean, exactly? What tool is being used for this?
    (3)If you are in Spring or other platforms you will get the message whether to change the model or not. Of course you know what to do =). I do not know what to do. It is not helpful to write such a vague, obtuse instruction.

    I don't speak for netmsm, and he's more than capable of doing that himself.

    But, for myself, I just wanted to say I think your comments are very unfair. 1st) The guide does say exactly how to back up those partitions, you, obviously, just don't recognize that, and probably thus have no idea what the utilities mentioned in the guide do. (hint: see where qualcomm and qfil are mentioned - just before 'make a backup'.

    2nd) If u don't understand something in the guide, read the comments others have made, because it's possible someone else has already asked that question. Re the 'Of course u know what to do', you'll find others have said they got that pop-up, and others didn't. From that u can deduce, it's not **critical**. And, if anything, u realize it's kind of a joke... as in 'who want's a sprint phone anyway?' Get it?

    There's no reason to be disparaging because u can't follow a guide without having to do any thinking at all. Sometimes, a guide can be 'over our head'. I.E. u just don't have enough experience in this area. Remember, a guide writer faces a dilemma; how to get the information across, succinctly, without becoming too verbose. Too verbose and the guide becomes a book, and most of us that write guides have no desire to spend the time it takes to write a book.

    If u don't understand, ask questions, but don't be disparaging. We should all be thankful netmsm even bothered to take the time to write this!

    cheers
    3
    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!
    2
    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 ^_^
    Idk when i opened lgup it's only have 3 option refurbished, upgrade n fota update