Database Develop

LG 4xHD not registered

I have just managed to root my old LG P880/4xHD using advice from this forum. Thought I would try on an old phone first. One reason I tried is because I cannot update Android via the usual About phone, Software updates, Check now for updates. The Android version installed is 4.0.3. I am in Australia and it is possible the phone is an overseas model (got it from a friend in LG). Has "Not for Resale" stamped inside the back cover. When I try to update Android, I get an error message "Registered Error - Your device is not registered yet." I had hoped rooting would get around this but it hasn't. Have looked up old forum posts and there is talk of using .kdz files and all sorts of other things. Can anyone help me get around this registration issue but please be aware I am a novice and most of the older posts I read, I couldn't understand so simple explanations please. Thanks.

What you have is developer or test device and it is a bit different from normal ones. Try googling more but you will have hard time....
Sent from my microwave.

dimi89 said:
What you have is developer or test device and it is a bit different from normal ones. Try googling more but you will have hard time....
Sent from my microwave.
Click to expand...
Click to collapse
Could it be that it has overseas firmware, I read in a two or three year old post that this can happen but there was a way to get around this.
PD

pdonahue said:
Could it be that it has overseas firmware, I read in a two or three year old post that this can happen but there was a way to get around this.
PD
Click to expand...
Click to collapse
So...Did you try flashing kdz file and updating it that way or ... ?

pdonahue said:
I have just managed to root my old LG P880/4xHD using advice from this forum. Thought I would try on an old phone first. One reason I tried is because I cannot update Android via the usual About phone, Software updates, Check now for updates. The Android version installed is 4.0.3. I am in Australia and it is possible the phone is an overseas model (got it from a friend in LG). Has "Not for Resale" stamped inside the back cover. When I try to update Android, I get an error message "Registered Error - Your device is not registered yet." I had hoped rooting would get around this but it hasn't. Have looked up old forum posts and there is talk of using .kdz files and all sorts of other things. Can anyone help me get around this registration issue but please be aware I am a novice and most of the older posts I read, I couldn't understand so simple explanations please. Thanks.
Click to expand...
Click to collapse
Its a year old phone, its not like its the nexus one or samsng galaxy s2...
Try flashing 4.12 with kdz. Google is your friend, try kdz flash 4.1.2 Optimus 4x hd.
Funny thing, when I bought my phone, only google asked me to register the phone, the usual Google Play thing. SO what do you exactly mean with REGISTER?

i think the whole phone isn't registred by LG for consumers, like dimi89 said it has to be a dev device. they aren't registred and cannot be updated/used the normal way. the serial number of this phone isn't present in the LG databases i think. Just flash kdz and everything is fine. You know that you don't get any support or warranty on that phone but you should know that.

{PLS HELP} LGflashtool stuck at 9% - Connection failed -

Hello everyone,
Im new at Rooting, but I'm good at following instruction from videos, forums, and whatever I get my hands on. I have an LG G4, that I recently rooted. There are some issue with Root, and some applications I cant run (like snapchat- I had tried with Rootswitcher and Magisk but failed).
I followed instructions from several videos and forums here at Xda-Devs. But nothing seems to work. I have download multiple firmwares but everytime i get an error. the lgflashtool14 goes up to 9 % and there is some logs in my phone, but everything stops.
Also I want to mentioned that this are the steps that i rooted
Please any help will be appreciated, I want to go back to stock. :fingers-crossed:
Edit : I have tried all variants of the firmware, some they not even get stuck they say " contact administrator "

An3ru said:
Hello everyone,
Im new at Rooting, but I'm good at following instruction from videos, forums, and whatever I get my hands on. I have an LG G4, that I recently rooted. There are some issue with Root, and some applications I cant run (like snapchat- I had tried with Rootswitcher and Magisk but failed).
I followed instructions from several videos and forums here at Xda-Devs. But nothing seems to work. I have download multiple firmwares but everytime i get an error. the lgflashtool14 goes up to 9 % and there is some logs in my phone, but everything stops.
Also I want to mentioned that this are the steps that i rooted
Please any help will be appreciated, I want to go back to stock. :fingers-crossed:
Edit : I have tried all variants of the firmware, some they not even get stuck they say " contact administrator "
Click to expand...
Click to collapse
why flash other variants? what phone you have,?? why use flashtools and not LGUP try LGUP.

raptorddd said:
why flash other variants? what phone you have,?? why use flashtools and not LGUP try LGUP.
Click to expand...
Click to collapse
Hey Raptorddd,
I have a LG G4 h811. And i been trying using LGUp but when i plug my phone under model it says "unlnown". I been trying to fix with but with no solution. Well other t mobile variants i meant there are like 4 out there and i have different errors.

An3ru said:
Hey Raptorddd,
I have a LG G4 h811. And i been trying using LGUp but when i plug my phone under model it says "unlnown". I been trying to fix with but with no solution. Well other t mobile variants i meant there are like 4 out there and i have different errors.
Click to expand...
Click to collapse
then i think its not a h811. open up phone and take motherborad out see what it says on the actual motherboard in your hand, what ever it says flash that, maybe is not a h811

raptorddd said:
then i think its not a h811. open up phone and take motherborad out see what it says on the actual motherboard in your hand, what ever it says flash that, maybe is not a h811
Click to expand...
Click to collapse
Hey man, I followed your instructions, and in one side of the motherboard says, EAX #####501_h810_main_1.0. Would that be the firmware im looking for.??
*edit : its weird since I look up the H810 is a ATT, but I got this Phone in Tmobile
*edit 2: by dialing *#*#244773825625#*#* it gives me this - HW version Rev1.0 - Factory Version LGH811AT-01-V20r-310-260-jan-11-2017-arb03-SW ORIGINAL VERSION *same as the factory version*- Anti rollback version 3-

An3ru said:
Hey man, I followed your instructions, and in one side of the motherboard says, EAX #####501_h810_main_1.0. Would that be the firmware im looking for.??
*edit : its weird since I look up the H810 is a ATT, but I got this Phone in Tmobile
*edit 2: by dialing *#*#244773825625#*#* it gives me this - HW version Rev1.0 - Factory Version LGH811AT-01-V20r-310-260-jan-11-2017-arb03-SW ORIGINAL VERSION *same as the factory version*- Anti rollback version 3-
Click to expand...
Click to collapse
go by what the motherboard says.. if you got it from tmobile return it.
yes seems yours its a att 810
motherboard is what determines your variant other things can be edited but not that number and printing on mitherboard
yes weird they might be refurbishing phone using other motherboards

raptorddd said:
then i think its not a h811. open up phone and take motherborad out see what it says on the actual motherboard in your hand, what ever it says flash that, maybe is not a h811
Click to expand...
Click to collapse
Well I got it more than a year, unfortunately. Also I tried LGup and it gets the port and what software Im using, But model says unknown. I want to select the phone, but first i have to select the model, is there any fix in this situation?!

raptorddd said:
go by what the motherboard says.. if you got it from tmobile return it.
yes seems yours its a att 810
motherboard is what determines your variant other things can be edited but not that number and printing on mitherboard
yes weird they might be refurbishing phone using other motherboards
Click to expand...
Click to collapse
Ok, but i might not be able to return it since its past the year. And with LGup I open the software and states that MODEL "unknown" and gets the COM port and the software im runing in a small window. Is there any fix for it, that you know of?.

An3ru said:
Well I got it more than a year, unfortunately. Also I tried LGup and it gets the port and what software Im using, But model says unknown. I want to select the phone, but first i have to select the model, is there any fix in this situation?!
Click to expand...
Click to collapse
do you have the h810 KDZ .? not sure i can help much more.. maybe try in the KDZ go back to stock thread or do search..
or try updating this files
https://forum.xda-developers.com/showpost.php?p=73631178&postcount=931

raptorddd said:
do you have the h810 KDZ .? not sure i can help much more.. maybe try in the KDZ go back to stock thread or do search..
or try updating this files
https://forum.xda-developers.com/showpost.php?p=73631178&postcount=931
Click to expand...
Click to collapse
I have it, but I attempt to flash it with lgflashtools and still stuck at 9%. Also tried LGup, and still im unable to do anything with that program

Korea region V40, can I flash to European firmware?

Hello,
I have a LM-V409N here. It has some Korean bloatware but worse than that, even though the phone is set to English, a lot of things are still in Korean. For example an available software update description is in Korean. Buttons in the phone app show Korean text, etc.
Can I flash a European firmware on to this model? Will that 'just work'?
I hope someone can help me with this.
Thank you,

Rooted? you won't get far otherwise. Had the same problem on my korean G5.
On a rooted device though, you can edit the build.prop locale to your native region to turn off the korean elements of the UI and obviously remove the bloat.
some of the bloat can be disabled even if uninstall isn't allowed. Carrier specific ones can't unfortunately.
Flashing wise, iirc that's a no go as it will break radio. No signal afterwards. At least that was the problem on the V35.

Thank you so much for your reply. This makes me worry a bit less
No I don't have it rooted (yet). I will go figure out how to do that for this phone model and then if I can't find out how to do the build.prop changes I will come back here to ask for help
Do you have any idea why WiFi HotSpot is not working properly? Laptops and other phones just don't see the SSID and when trying to setup a 5GHz hotspot, the slider hangs when you turn it on (turns gray and freezes) and you have to reboot the phone to get it enabled again. But it will only turn on when on 2.4GHz.
If I can get all the Korean stuff to disappear, flashing won't be necessary anymore So let me get to finding that out!
Let's first see if flashing fixes anything.
Thank you so much once again!
Edit: Come to think of it, when I turn on the phone it shows an SK Telecom animation and sound (some Korean carrier I guess) and I would like that removed as well..
I guess the only way to get that removed is to flash another firmware? Would you know a firmware version for this LM-V409N which is just 'LG original' without any carrier/provider customization?
Thank you!
Edit2: OK, I found out how I can flash a stock firmware using the LGUP tool. However, this fails at the beginning of the process because of an 'Initialize' error.
I suspect I need the device to be rooted before flashing..? I could find how to flash pretty easily, but how to root..?
Can anyone point me to a guide for rooting the V40?
Thanks!

No, you don't need root. Just search here on xda for crossflash word. In the g7 forum I have made an tutorial. You will need lg drivers, com port, lg up and common. DLL for v40. For g7 it works like a charm. Be sure to check and compare GSM bands from Korea to EU. For g7 they was the same.

Inerent said:
No, you don't need root. Just search here on xda for crossflash word. In the g7 forum I have made an tutorial. You will need lg drivers, com port, lg up and common. DLL for v40. For g7 it works like a charm. Be sure to check and compare GSM bands from Korea to EU. For g7 they was the same.
Click to expand...
Click to collapse
OK, did all that. LGUP starts up, detects my LM-V409N correctly.
I select the KDZ file, set it to UPGRADE and click START.
Now it gives me the error 'LGUP Framework must be 1.16'. I have 1.14 apparently and I can't find 1.16 anywhere.
I read something about "If you do have some knowledge to bypass the LGUP Version Check on this DLL, then You can sideload kdz firmware onto your LG V40 ThinQ with LGUP 1.14." on this site: https://www.mylgphones.com/lgup-dll-for-lg-v40-thinq-version1-9-39-7.html
But again, I can't find anything about how to bypass that version check.
I tried with LGUP_common.dll versions 1.9.39.7 and 1.0.39.10. Both same result (need 1.16).
Also tried with 0.0.3.23 but that one gives the "Initialize" error after clicking START.
Any other tips or tricks you can suggest?
Thank you,

AzzKickah said:
OK, did all that. LGUP starts up, detects my LM-V409N correctly.
I select the KDZ file, set it to UPGRADE and click START.
Now it gives me the error 'LGUP Framework must be 1.16'. I have 1.14 apparently and I can't find 1.16 anywhere.
I read something about "If you do have some knowledge to bypass the LGUP Version Check on this DLL, then You can sideload kdz firmware onto your LG V40 ThinQ with LGUP 1.14." on this site: https://www.mylgphones.com/lgup-dll-for-lg-v40-thinq-version1-9-39-7.html
But again, I can't find anything about how to bypass that version check.
I tried with LGUP_common.dll versions 1.9.39.7 and 1.0.39.10. Both same result (need 1.16).
Also tried with 0.0.3.23 but that one gives the "Initialize" error after clicking START.
Any other tips or tricks you can suggest?
Thank you,
Click to expand...
Click to collapse
Hello.
I told you to look in g7 forum for crossflash. You will need lg up 1.15 and follow the exact steps. Beware it may brick your device, so I'm not responsible.
Link here https://forum.xda-developers.com/lg...ash-oreo-pie-firmwares-lg-g7-g7-t3915303/amp/
Warning!!! Pay attention not to download the common. DLL from there as it is for lg g7. You must download for your v40. Also for your firmware. Also you will loose your data, so backup first if you have important files, sms, etc.

Inerent said:
Hello.
I told you to look in g7 forum for crossflash. You will need lg up 1.15 and follow the exact steps. Beware it may brick your device, so I'm not responsible.
Link here https://forum.xda-developers.com/lg...ash-oreo-pie-firmwares-lg-g7-g7-t3915303/amp/
Warning!!! Pay attention not to download the common. DLL from there as it is for lg g7. You must download for your v40. Also for your firmware. Also you will loose your data, so backup first if you have important files, sms, etc.
Click to expand...
Click to collapse
OK so for my clarification, this method is how to bypass the version check? (If yes, I will go try this).
Or is this a separate method? (If it is separate, I'm afraid to brick it and I will not try it).
Thank you so much for your help. It really is very much appreciated.

AzzKickah said:
OK so for my clarification, this method is how to bypass the version check? (If yes, I will go try this).
Or is this a separate method? (If it is separate, I'm afraid to brick it and I will not try it).
Thank you so much for your help. It really is very much appreciated.
Click to expand...
Click to collapse
Yes, this is for bypassing the obsolete lg up 1.14.
But 1.15 will not work if you open it, it will ask you for developer user and password. But there is a hack with using cmd line. Follow my steps.
I repeat again, if there is a working DLL for lg v40 and if 40 supports crossflashing (highly it does) then you're good to go. Don't forget to check what is your com port when your v40 is connected in download mode.
---------- Post added at 11:39 AM ---------- Previous post was at 11:33 AM ----------
If you're connected to a USB 3.0 port and have quality USB c cable, it should install it in less than 1 minute
---------- Post added at 11:47 AM ---------- Previous post was at 11:39 AM ----------
Here is a little tutorial for V40
Easy commands for this new LGUP v1.15.06
If using powershell from win10:
1. Install USB drivers and put V40 in download mode - connect it to USB cable then go and check your COM port in windows device manger
2. Open powershell from C:\Program Files (x86)\LG Electronics\LGUP (shift + right mouse) and type cmd and hit enter.
3. Type this command: lgup_cmd.exe comX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "(path to your kdz firmware)"
Example: (if your phone is under com5 and your kdz is located in D:\ and has this name XXX.kdz)
lgup_cmd.exe com5 "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "D:\XXX.kdz"
Links:
LGUP new version - https://drive.google.com/file/d/1dJZ...jumm5mtKp/view
LGUP common.dll for V40 - you must download it.
Firmwares: https://lg-firmwares.com/
European firmwares for V40 - https://lg-firmwares.com/lg-lmv405ebw-firmwares/#tab=firmwares

[/COLOR]Here is a little tutorial for V40
Easy commands for this new LGUP v1.15.06
If using powershell from win10:
1. Install USB drivers and put V40 in download mode - connect it to USB cable then go and check your COM port in windows device manger
2. Open powershell from C:\Program Files (x86)\LG Electronics\LGUP (shift + right mouse) and type cmd and hit enter.
3. Type this command: lgup_cmd.exe comX "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "(path to your kdz firmware)"
Example: (if your phone is under com5 and your kdz is located in D:\ and has this name XXX.kdz)
lgup_cmd.exe com5 "C:\Program Files (x86)\LG Electronics\LGUP\model\common\LGUP_Common.dll" "D:\XXX.kdz"
Links:
LGUP new version - https://drive.google.com/file/d/1dJZ...jumm5mtKp/view
LGUP common.dll for V40 - you must download it.
Firmwares: https://lg-firmwares.com/
European firmwares for V40 - https://lg-firmwares.com/lg-lmv405ebw-firmwares/#tab=firmwares
Click to expand...
Click to collapse
It worked!! :laugh:
You are the best. THANK YOU for your help!
Damn that was scary to watch that percentage creep up towards 100%

AzzKickah said:
It worked!! :laugh:
You are the best. THANK YOU for your help!
Damn that was scary to watch that percentage creep up towards 100%
Click to expand...
Click to collapse
What dll did you used? and from where did you find the information that the dll is correct? please links. :angel:

Inerent said:
What dll did you used? and from where did you find the information that the dll is correct? please links. :angel:
Click to expand...
Click to collapse
DLL: https://drive.google.com/file/d/1qKRlOFVZMIanphD-jp6dxenCqkaZP2Zc/view?usp=sharing
Information/details: https://www.mylgphones.com/lgup-dll-for-lg-v40-thinq-version1-9-39-7.html
Firmware: https://lg-firmwares.com/lg-lmv409n-firmwares/#tab=firmwares

AzzKickah said:
DLL: https://drive.google.com/file/d/1qKRlOFVZMIanphD-jp6dxenCqkaZP2Zc/view?usp=sharing
Information/details: https://www.mylgphones.com/lgup-dll-for-lg-v40-thinq-version1-9-39-7.html
Firmware: https://lg-firmwares.com/lg-lmv409n-firmwares/#tab=firmwares
Click to expand...
Click to collapse
So you didn't flashed the European firmware?

Inerent said:
So you didn't flashed the European firmware?
Click to expand...
Click to collapse
No I didn't. Neocyke told me that radio wouldn't work that way so that would have been useless then. This is the post: https://forum.xda-developers.com/showpost.php?p=80177222&postcount=2
Or did he mean FM Radio......? Because I could live without FM Radio.
The one I did flash is still Korean, but it has no carrier customization. No cellular provider specific apps, no Korean company logo's at startup.
Only thing I noticed is that there still are Korean characters showing right below the numbers in the phone dialer app. But it also shows ABC, DEF, etc.
Oh, and a second clock showing Korean time on the lock screen :silly: which I can't find out how to turn off

AzzKickah said:
No I didn't. Neocyke told me that radio wouldn't work that way so that would have been useless then. This is the post: https://forum.xda-developers.com/showpost.php?p=80177222&postcount=2
Or did he mean FM Radio......? Because I could live without FM Radio.
The one I did flash is still Korean, but it has no carrier customization. No cellular provider specific apps, no Korean company logo's at startup.
Only thing I noticed is that there still are Korean characters showing right below the numbers in the phone dialer app. But it also shows ABC, DEF, etc.
Oh, and a second clock showing Korean time on the lock screen :silly: which I can't find out how to turn off
Click to expand...
Click to collapse
I also have that clock on my V50.
For me it worked with my g7+ Hong Kong international to European and also got volte amd vowifi.
Yes, he was referring to the GSM radio. So this will be risky.
Maybe you should not try. You can check if someone did it with G7....
I also have remembered that I cross flashed my G7 from HK to European, to Korean, back and fourth between them and all was fine.
---------- Post added at 06:16 PM ---------- Previous post was at 05:58 PM ----------
Maybe the V line from LG is risky about radios. Or maybe that was on V35. My point is that this is very risky an you should assume responsibility if flashing. Maybe it's better do not try it.

Inerent said:
I also have that clock on my V50.
For me it worked with my g7+ Hong Kong international to European and also got volte amd vowifi.
Yes, he was referring to the GSM radio. So this will be risky.
Maybe you should not try. You can check if someone did it with G7....
I also have remembered that I cross flashed my G7 from HK to European, to Korean, back and fourth between them and all was fine.
---------- Post added at 06:16 PM ---------- Previous post was at 05:58 PM ----------
Maybe the V line from LG is risky about radios. Or maybe that was on V35. My point is that this is very risky an you should assume responsibility if flashing. Maybe it's better do not try it.
Click to expand...
Click to collapse
You seem to contradict yourself, or do I misunderstand?
You can check if someone did it with G7....
I also have remembered that I cross flashed my G7 from HK to European, to Korean
Click to expand...
Click to collapse
Why check if someone did it if you already did?
I will see how it goes with this firmware for a week or two. If it is all fine, I'll leave it like this.
I don't suspect it will brick the phone though if I flash a European firmware.. As long as you can get into Download-mode, there is not much to worry about I think

AzzKickah said:
You seem to contradict yourself, or do I misunderstand?
Yes, I am also confused.
Why check if someone did it if you already did?
I didn't do it from Korean to European.
I will see how it goes with this firmware for a week or two. If it is all fine, I'll leave it like this.
I don't suspect it will brick the phone though if I flash a European firmware.. As long as you can get into Download-mode, there is not much to worry about I think
For this I was confused. I do believe 50% that it can be done without problems.
Click to expand...
Click to collapse
Anyway, the benefits for European are many. Volte, vowifi, less bloatware, faster speed.
Half of me is screaming to DO IT, while the other half is paranoic!

Inerent said:
Anyway, the benefits for European are many. Volte, vowifi, less bloatware, faster speed.
Click to expand...
Click to collapse
Faster speed..? Please elaborate.
It shows LTE in the status bar though. But I don't know if that is VoLTE.
Now you're making me doubt if I should try a European firmware....
Half of me is screaming to DO IT, while the other half is paranoic!
Click to expand...
Click to collapse
I'm feeling exactly the same right now :laugh:

AzzKickah said:
Faster speed..? Please elaborate.
It shows LTE in the status bar though. But I don't know if that is VoLTE.
Now you're making me doubt if I should try a European firmware....
Click to expand...
Click to collapse
Yes, for my G7 it was faster speeds. Better battery life also.

Inerent said:
Yes, for my G7 it was faster speeds. Better battery life also.
Click to expand...
Click to collapse
What do you think, would this be a good one to try?
V405EBW20a_00_OPEN_EU_DS_0524.kdz
LM-V405EBW...? On my LM-V409N, would that go..?

AzzKickah said:
What do you think, would this be a good one to try?
V405EBW20a_00_OPEN_EU_DS_0524.kdz
LM-V405EBW...? On my LM-V409N, would that go..?
Click to expand...
Click to collapse
I'll search what country has better laws regarding government spying on people. And that firmware I'll choose. Maybe it's the UK, I know that it has forbidden StingRays. Also Deutschland seems OK.

[Crossflash] - AT&T V405UA10 to Korean V409NUA

Hello all, been a little while with LG V40 as my second device, and loved it so much but tried to follow the crossflash procedures as mentioned here:
https://forum.xda-developers.com/lg-v40/how-to/guide-lgup-root-t3967858
and I succeeded with it, only few notes wanted to share as experience/question about them:
- wifi, 3G and 4G are working as it should and no other problem found.
1. after flashing, phone booted successfully to Android 10, giving strange error message :
"WARNING!
Current version is not available for user. Can't find matched carrier. Check NT-Code: 310410310150 310170,311180,310560,310030,3 10280,310950,313100,312670: FF,FF,FF,FF,FF,FF,FF,FF,FF,FF
2. there's no SN for the phone in the settings!
- attached some screenshots for errors, looking forward to seeing some feedback or help if possible with how to fix those problems.
thanks in advance for all for such great efforts done here.

Hi, possible remove simlock after crossflash? Thanks.
P.S.
To remove message "WARNING!
Current version is not available for user. Can't find matched carrier......"
You must have root and edit file cust_path_mapping.cfg

77an said:
Hi, possible remove simlock after crossflash? Thanks.
P.S.
To remove message "WARNING!
Current version is not available for user. Can't find matched carrier......"
You must have root and edit file cust_path_mapping.cfg
Click to expand...
Click to collapse
thank you so much, i overcome it by crossflashing the latest EU Android 10.
and, about sim lock, it can't be done with cross flashing.

abokamel said:
thank you so much, i overcome it by crossflashing the latest EU Android 10.
and, about sim lock, it can't be done with cross flashing.
Click to expand...
Click to collapse
Can you share the rom that you use?
Also, were you root?

oscarillo said:
Can you share the rom that you use?
Also, were you root?
Click to expand...
Click to collapse
no, it's stock, not rooted.
the current rom i use now is here

abokamel said:
no, it's stock, not rooted.
the current rom i use now is here
Click to expand...
Click to collapse
Thanks a lot for your reply.
One more question.
Did you do a Refurbish or Upgrade option?

oscarillo said:
Thanks a lot for your reply.
One more question.
Did you do a Refurbish or Upgrade option?
Click to expand...
Click to collapse
used the command line, i think it's making refurbish

This is a bit of an older thread, but just recently did the same crossflash from pie on att device to korean open Q.
Decided on the KR instead of EBW because KR, I thought, had more of the t-mo LTE bands I needed. Unfortunately, the different sites with firmware specs aren't always accurate (which LTE bands supported). One site has EBW supporting every LTE band of every LG phone! Def inaccurate.
So I tested both EBW and KR Q versions. Use LTE Discovery (from playstore) to view LTE bands in your current location. One thing to note about that, the LTE bands it shows u are going to be the nearest towers it's using. Which means that another tower, a little farther away, won't show up.
So to verify a particular band, that you think the phone might be capable of, but you aren't sure, you have to go into the svc menu and select 'field test' and enable only that LTE band you're searching for. Then use LTE Discovery and see if it's connected with that band. If it isn't connected with it (usually it will default to a 3G band if that one u selected isn't available), that means 2 things; 1) either that band isn't used in your area 2) Your device doesn't support that band (or both 1 and 2).
But in my case, I know band 71 works in my area (from previous testing), but I have to select enable for only that band for it to show up, because other nearby towers with band 66 will 'drown it out'.
Thus, the point here, the KR firmware Band 71 **DOES WORK**. And, btw, no site indicates it included in supported bands. The following screenshot shows it connected to 71 and the KR 409 at the bottom.
Cheers

abokamel said:
Hello all, been a little while with LG V40 as my second device, and loved it so much but tried to follow the crossflash procedures as mentioned here:
https://forum.xda-developers.com/lg-v40/how-to/guide-lgup-root-t3967858
and I succeeded with it, only few notes wanted to share as experience/question about them:
- wifi, 3G and 4G are working as it should and no other problem found.
1. after flashing, phone booted successfully to Android 10, giving strange error message :
"WARNING!
Current version is not available for user. Can't find matched carrier. Check NT-Code: 310410310150 310170,311180,310560,310030,3 10280,310950,313100,312670: FF,FF,FF,FF,FF,FF,FF,FF,FF,FF
2. there's no SN for the phone in the settings!
- attached some screenshots for errors, looking forward to seeing some feedback or help if possible with how to fix those problems.
thanks in advance for all for such great efforts done here.
Click to expand...
Click to collapse
Just bought an unlocked AT&T V405UA I'm running on T Mobile. I've spent the last two days trying flashing and reflashing different roms and trying to root my phone and ran into the NT code errors as well. I'm now finally running V409NO30d_00_OPEN_KR_OP_0716 with Magisk root and no NT code error. Here's how I got rid of the NT code error.
You need to have root access to so you can open your /oem/OP/cust_path_mapping.cfg and a hex editor. I use HxD.
Write down the number you have in the beginning, in my case "FFFFFF,60"
Reboot into 9008, open QFil and backup your FTM by choosing "READ" option
File will be stored at C:\Users\User\AppData\Roaming\Qualcomm\QFIL\COMPORT_9
Rename file to FTM_original.bin and open in HxD
Press ctrl + G to go to offset 14000
and replace first section with number you wrote down from cust_path_mapping earlier while deleting everything after
Also, if you're missing a serial number you can add that in as well, located at offset 12000 in the FTM file
Replace the red FFFFFFFFFFFFFF with your serial #
Once done, hit "SAVE AS" so you have a backup of the original if things go wrong and rename to FTM_fixed.bin
Flash FTM_fixed.bin in QFil and reboot. Should be no more error.

advancedtekniqs said:
Just bought an unlocked AT&T V405UA I'm running on T Mobile. I've spent the last two days trying flashing and reflashing different roms and trying to root my phone and ran into the NT code errors as well. I'm now finally running V409NO30d_00_OPEN_KR_OP_0716 with Magisk root and no NT code error. Here's how I got rid of the NT code error.
<snip brevity>
Flash FTM_fixed.bin in QFil and reboot. Should be no more error.
Click to expand...
Click to collapse
Wow thanks for that. First I've seen this idea to fix that issue. Other methods didn't work. Will try soon.
There are some other values you can change in cust.prop that can help also. Get's rid of most of the KR language in unexpected places. Will jot them down and add them here shortly.
cheers

AsItLies said:
Wow thanks for that. First I've seen this idea to fix that issue. Other methods didn't work. Will try soon.
There are some other values you can change in cust.prop that can help also. Get's rid of most of the KR language in unexpected places. Will jot them down and add them here shortly.
cheers
Click to expand...
Click to collapse
I've only been using this rom for about 6 hours. I haven't really noticed any KR except on the phone dialer. Doesn't really bother me, but if you have a way to set that to ENG, I'd like to know as well.

advancedtekniqs said:
I've only been using this rom for about 6 hours. I haven't really noticed any KR except on the phone dialer. Doesn't really bother me, but if you have a way to set that to ENG, I'd like to know as well.
Click to expand...
Click to collapse
Yes u need to change the cust.prop in OP. Change the target region country to US (from KR) and same for target country. Change language prop to en_US.
Additionally, change featureset prop to OPENUS from OPENKR.
these changes disable most KR elements in firmware, most noticeably dual clock and call recording in dialer. They **may** also enable volte if supported by carrier.
This is from nice guy Neo on tele group who's played with this much more than I have
Cheers
Oh yeah, lol, just remembered, the main reason I was asking for the info above was to get the 'field test' selection (so you can select LTE bands) in the SVC Menu from dialer. By default, it doesn't show up, but above changes fixes that also.

advancedtekniqs said:
Just bought an unlocked AT&T V405UA I'm running on T Mobile. I've spent the last two days trying flashing and reflashing different roms and trying to root my phone and ran into the NT code errors as well. I'm now finally running V409NO30d_00_OPEN_KR_OP_0716 with Magisk root and no NT code error. Here's how I got rid of the NT code error.
You need to have root access to so you can open your /oem/OP/cust_path_mapping.cfg and a hex editor. I use HxD.
Write down the number you have in the beginning, in my case "FFFFFF,60"
Reboot into 9008, open QFil and backup your FTM by choosing "READ" option
File will be stored at C:\Users\User\AppData\Roaming\Qualcomm\QFIL\COMPORT_9
Rename file to FTM_original.bin and open in HxD
Press ctrl + G to go to offset 14000
and replace first section with number you wrote down from cust_path_mapping earlier while deleting everything after
Also, if you're missing a serial number you can add that in as well, located at offset 12000 in the FTM file
Replace the red FFFFFFFFFFFFFF with your serial #
Once done, hit "SAVE AS" so you have a backup of the original if things go wrong and rename to FTM_fixed.bin
Flash FTM_fixed.bin in QFil and reboot. Should be no more error.
Click to expand...
Click to collapse
thank you so much for sharing such detailed fix for that strange problem., as a work around, I managed to flash OPEN US kdz, then reflashed the open KR, then it's gone now, but i can't find mt phone's serial number when showing it on settings.
thanks again for such amazing tutorial. keep up

AsItLies said:
Yes u need to change the cust.prop in OP. Change the target region country to US (from KR) and same for target country. Change language prop to en_US.
Additionally, change featureset prop to OPENUS from OPENKR.
these changes disable most KR elements in firmware, most noticeably dual clock and call recording in dialer. They **may** also enable volte if supported by carrier.
This is from nice guy Neo on tele group who's played with this much more than I have
Cheers
Oh yeah, lol, just remembered, the main reason I was asking for the info above was to get the 'field test' selection (so you can select LTE bands) in the SVC Menu from dialer. By default, it doesn't show up, but above changes fixes that also.
Click to expand...
Click to collapse
that's terrific and brilliant to be honest! thank you so much for information you shared.

So, just found something additional that works on open 409N. The 'buffer fix' can be a bit of a pain. Tried a magisk module supposedly for v40 Q but that didn't work. So did what I've done before and just copy the .so fix to the appropriate directory, but that didn't work, even the oem camera stopped working after that.
So, even though this says it's for 'custom roms' tried it, and boom, works in magisk and does what's needed to fix buffer.
cheers

abokamel said:
thank you so much for sharing such detailed fix for that strange problem., as a work around, I managed to flash OPEN US kdz, then reflashed the open KR, then it's gone now, but i can't find mt phone's serial number when showing it on settings.
thanks again for such amazing tutorial. keep up
Click to expand...
Click to collapse
Try this website to find your seriel# by IMEI

So, interesting updates, for anyone using this Rom.
I went back to my AT&T rom, android 9. Then, just a few hours later... decided to go back to KR Open Don't ask, it's too confusing
But, the point, this time, when flashing the KR rom, I did part DL, and then after booting did Refurbish. Had read on tele that doing that fixes some of the issues crossflashing causes. Sure enough, my NT-code issue went away (couldn't fix that even with hexedit of ftm)!
So, that was cool. But now, my S/N disappeared! IMEI was still okay though. So tried the hexedit ftm and added S/N, boom, now it's fine also. But the funny thing was, with the refurbish and no NT-code problem, I looked at what was in the newer ftm at that address, and it had nothing, no info at that address at all.
One thing to be aware of, attesting to why this is difficult to deal with, these values (IMEI, S/N - and others) get propagated from one partition to another, I don't know the chain of events or criteria involved, but it adds to the difficulty of trying to fix issues. Which specific place it looks for something is confusing also, and if it's doing compares of 2 or more places is a mystery.
But anyway, do a Part DL to crossflash, then do a Refurb and it appears to fix some of the issues.
cheers

Awesome work, fellas!
What program and files do you all have success with during the flashing? Perhaps share a link to it?
Also, is a serial number necessary? For using the phone and having service? Seems you guys are taking the blank serial number very seriously. Thanks!
---------- Post added at 05:03 AM ---------- Previous post was at 05:00 AM ----------
AsItLies said:
But anyway, do a Part DL to crossflash, then do a Refurb and it appears to fix some of the issues.
cheers
Click to expand...
Click to collapse
So for an old sprint v40 running oreo, Just crossflash to the korean Q rom via partition DL, then again, with Refurb option? Or swap between different roms? Haven't done any crossflashing yet..hoping to avoid errors. Serial number loss won't stop the phone from working, right?

fireblade20 said:
Awesome work, fellas!
What program and files do you all have success with during the flashing? Perhaps share a link to it?
Also, is a serial number necessary? For using the phone and having service? Seems you guys are taking the blank serial number very seriously. Thanks!
---------- Post added at 05:03 AM ---------- Previous post was at 05:00 AM ----------
So for an old sprint v40 running oreo, Just crossflash to the korean Q rom via partition DL, then again, with Refurb option? Or swap between different roms? Haven't done any crossflashing yet..hoping to avoid errors. Serial number loss won't stop the phone from working, right?
Click to expand...
Click to collapse
Mine is an AT&T, but afaik, Sprint should be the same. Yes, do the part DL, let it reboot as normal, then shut off and do refurb. Is S/N a big deal? no, everything works, and the S/N is still in the phone, just not displaying properly. It's an individual thing how much effort you put into fixing that. Some people have lost either / or IMEI or dual IMEI (some roms have that), when cross flashing. That's a problem because they get no cell signal, but that's on a different rom.
Look in this thread for how to LGUP / crossflash.
cheers

Thanks man!

Network Unlock After Crossflashing

I Need Help... Few days ago I bought Lg V40 Think At&t locked network phone and it was on Android 8.1 Oreo. I wanted to update it to Android 10 somehow I came to know that we can update through lgup. But I accidently flashed Verizon kdz and now I get to know that we can't flash At&t kdz as its not available anywhere.
Now my phone is not asking for network unlock code as it asked on previous firmware At&t. But Sim is also not Working and also giving nt-code carrier unmatched error message whenever I restart Phone.
I found it on xda that Nt code error can be fixed by flashing v405ebw rom as someone else also faced this error and fixed Nt code error by flashing v405ebw.
Now to Main Question Can I unlock network now after crossflashing the kdz my previous network was At&t

Haiderkaramatali said:
I Need Help... Few days ago I bought Lg V40 Think At&t locked network phone and it was on Android 8.1 Oreo. I wanted to update it to Android 10 somehow I came to know that we can update through lgup. But I accidently flashed Verizon kdz and now I get to know that we can't flash At&t kdz as its not available anywhere.
Now my phone is not asking for network unlock code as it asked on previous firmware At&t. But Sim is also not Working and also giving nt-code carrier unmatched error message whenever I restart Phone.
I found it on xda that Nt code error can be fixed by flashing v405ebw rom as someone else also faced this error and fixed Nt code error by flashing v405ebw.
Now to Main Question Can I unlock network now after crossflashing the kdz my previous network was At&t
Click to expand...
Click to collapse
Well first, the nt-error code thing, no, you do not have to flash ebw rom to fix that, that's a misunderstanding and the post you read the person may not have made that part clear.
The nt-error code is pretty easily fixed, but, it has zero effect. It does absolutely no harm, and it only happens when you boot the phone. So, if you are thinking that somehow is contributing to your problem, no, it is not.
So your problem though is a pretty big one, as you suspect. You have to have the at&t variant rom for it to ask for the code, but the at&t kdz doesn't exist. I'd suggest join the tele group for v40, they have people there that have been through this problem, and pretty sure there's a backup of at&t there also. You would probably have to use qfil and flash ea partition one by one, but at least you'd get it back, the rom that is.
cheers

AsItLies said:
Well first, the nt-error code thing, no, you do not have to flash ebw rom to fix that, that's a misunderstanding and the post you read the person may not have made that part clear.
The nt-error code is pretty easily fixed, but, it has zero effect. It does absolutely no harm, and it only happens when you boot the phone. So, if you are thinking that somehow is contributing to your problem, no, it is not.
So your problem though is a pretty big one, as you suspect. You have to have the at&t variant rom for it to ask for the code, but the at&t kdz doesn't exist. I'd suggest join the tele group for v40, they have people there that have been through this problem, and pretty sure there's a backup of at&t there also. You would probably have to use qfil and flash ea partition one by one, but at least you'd get it back, the rom that is.
cheer
Click to expand...
Click to collapse

Horrible_AT&T_Android_Q_build.7z
drive.google.com
I found this file on notes on lg v40 group saying attq, when opened link it says Horrible Att Android q Build and it's zip file.
I wants to ask is that the backup for Att Android 10 firmware or is it something else.
AsItLies said:
Well first, the nt-error code thing, no, you do not have to flash ebw rom to fix that, that's a misunderstanding and the post you read the person may not have made that part clear.
The nt-error code is pretty easily fixed, but, it has zero effect. It does absolutely no harm, and it only happens when you boot the phone. So, if you are thinking that somehow is contributing to your problem, no, it is not.
So your problem though is a pretty big one, as you suspect. You have to have the at&t variant rom for it to ask for the code, but the at&t kdz doesn't exist. I'd suggest join the tele group for v40, they have people there that have been through this problem, and pretty sure there's a backup of at&t there also. You would probably have to use qfil and flash ea partition one by one, but at least you'd get it back, the rom that is.
cheers
Click to expand...
Click to collapse
Horrible_AT&T_Android_Q_build.7z
drive.google.com
I found this file on notes on lg v40 group saying attq, when opened link it says Horrible Att Android q Build and it's zip file.
I wants to ask is that the backup for Att Android 10 firmware or is it something else.

Haiderkaramatali said:
Horrible_AT&T_Android_Q_build.7z
drive.google.com
I found this file on notes on lg v40 group saying attq, when opened link it says Horrible Att Android q Build and it's zip file.
I wants to ask is that the backup for Att Android 10 firmware or is it something else.
Horrible_AT&T_Android_Q_build.7z
drive.google.com
I found this file on notes on lg v40 group saying attq, when opened link it says Horrible Att Android q Build and it's zip file.
I wants to ask is that the backup for Att Android 10 firmware or is it something else.
Click to expand...
Click to collapse
Yes that's the backup of Q. The person said 'horrible' just because it's at&t, that's all, not anything to do with the quality of the backup.
Many people have used that backup and it's worked for them.

AsItLies said:
Yes that's the backup of Q. The person said 'horrible' just because it's at&t, that's all, not anything to do with the quality of the backup.
Many people have used that backup and it's worked for them.
Click to expand...
Click to collapse
Can you guide me how to flash it through qfil I'm not an expert. I can't find any forum etc on this topic for flashing at&t rom through qfil with this kind of backup.
.
Thanks

Haiderkaramatali said:
Can you guide me how to flash it through qfil I'm not an expert. I can't find any forum etc on this topic for flashing at&t rom through qfil with this kind of backup.
.
Thanks
Click to expand...
Click to collapse
There's really no guide specifically for this, just look in the guides section and get qfil set up and working. Then, simply unzip the att rom file and begin flashing ea individual partition to the appropriate partition in qfil.