Downgrading LG G4 F500L from Nougat to LP or MM - G4 Q&A, Help & Troubleshooting

I want to unlock my LG 500L(I guess everyone wants that right ) which is updated to nougat.
I tried to downgrading using the F500l20u kdz from lg firmware using LGUP but it failed at 11%.
Replaced the .dll file , still no luck.
Tried to go back to LP using the tot but it failed giving the unknown command error.
So if anyone of you who want to support the unlocking of LG g4 F500L with nougat can give me suggestions on how to go back to MM in order to flash the USU.
Flashing back the Nougat kdz works fine though.

sushant_ said:
I want to unlock my LG 500L(I guess everyone wants that right ) which is updated to nougat.
I tried to downgrading using the F500l20u kdz from lg firmware using LGUP but it failed at 11%.
Replaced the .dll file , still no luck.
Tried to go back to LP using the tot but it failed giving the unknown command error.
So if anyone of you who want to support the unlocking of LG g4 F500L with nougat can give me suggestions on how to go back to MM in order to flash the USU.
Flashing back the Nougat kdz works fine though.
Click to expand...
Click to collapse
Pls provide the exact way:
You replaced the dll: which do you use? Share the link. How did you replaced it? Write the file path you used.
You tried to go back to LP: which one? Share the link.
If you used the right dll you need to flash a MM based ROM first afaik.
what lgup version do you use? Shown at the bottom when started. Should be 0.0.4.0
I would recommend to change the title to something better explaining what you need (downgrade a f500 from N to LP).
Sent from my LG-H815 using XDA Labs

I used the LPUp with dll version 0.4.0
I download the LP tot from this thread:
https://forum.xda-developers.com/g4/general/tot-lg-g4-korean-f500l-tot-flash-files-t3294417
I downloaded the kdz of LP and MM from here
https://lg-firmwares.com/lg-f500l-firmwares/
I followed the LP up refurbish option.
I tried the .dz file extraction and installation using the LPUP, still it gives the command unknown at 11%.
I used the latest .dll file from this thread:
https://forum.xda-developers.com/g4/help/lg-g4-lastest-version-lgup-dll-file-t3586220

Anyone who know the way to downgrade?
Please help

Anyone who know the way to downgrade?
Please help

You better had posted in help forum instead of here. Report your own thread (button beyond your post) and ask for thread move to help section... Just a suggestion..
Besides that:
Have you tried that https://forum.xda-developers.com/g4...rying-to-flash-kdz-lgup-t3666486/post73642302
Yea I know it's for the h815 but it's known that cross flashing between f500 and h815 is no problem an if that works well then you go UsU anyways
Ah and yes you have to hexedit the kdz to make it flash on yours.
Sent from my LG-H815 using XDA Labs

steadfasterX said:
You better had posted in help forum instead of here. Report your own thread (button beyond your post) and ask for thread move to help section... Just a suggestion..
Besides that:
Have you tried that https://forum.xda-developers.com/g4...rying-to-flash-kdz-lgup-t3666486/post73642302
Yea I know it's for the h815 but it's known that cross flashing between f500 and h815 is no problem an if that works well then you go UsU anyways
Ah and yes you have to hexedit the kdz to make it flash on yours.
Sent from my LG-H815 using XDA Labs
Click to expand...
Click to collapse
How can I hexedit the kdz file? I don't know exactly which part I should change.

Related

G3 F400K that thinks it's a F400L

Hello,
Can someone please point me in the right direction on how to get my F400K that thinks it's a F400L back to F400K?
I tried a couple of the custom roms from the G3 Development forum, but now I want to flash back to stock firmware and the LG Firmware tool errors out and says that CrossDL F400L to F400K error.
Recovery screen shows KTV49L.F400L10A if it helps in anyway.
I just signed up so I'm not able to post this message on the custom rom /development thread.
Cheers,
Jeff
OZJeff said:
Hello,
Can someone please point me in the right direction on how to get my F400K that thinks it's a F400L back to F400K?
I tried a couple of the custom roms from the G3 Development forum, but now I want to flash back to stock firmware and the LG Firmware tool errors out and says that CrossDL F400L to F400K error.
Recovery screen shows KTV49L.F400L10A if it helps in anyway.
I just signed up so I'm not able to post this message on the custom rom /development thread.
Cheers,
Jeff
Click to expand...
Click to collapse
I'm in the same boat, but the other way round. My F400L comes with a F400K firmware and now I can't update it. I've tried flashing the stock firmware following the guide and also got an error saying wrong device model.
windwave said:
I'm in the same boat, but the other way round. My F400L comes with a F400K firmware and now I can't update it. I've tried flashing the stock firmware following the guide and also got an error saying wrong device model.
Click to expand...
Click to collapse
You need to you file explorer with root access and access system/build.prop change your model number in there to F400L and then then restore with the F400L firmware and DLL file using Flash Tool.
jms.flynn said:
You need to you file explorer with root access and access system/build.prop change your model number in there to F400L and then then restore with the F400L firmware and DLL file using Flash Tool.
Click to expand...
Click to collapse
I had a hunch that this was the case, do you know which exact setting that needs to be changed?
I see references to F400L on the following settings
ro.build.id
ro.build.version.incremental
ro.lge.factoryversion
ro.lge.swvesion
ro,product.model
ro.build.description
Cheers.
I've got the same issue as windwave, my F400L came with F400K firmware and I can't update. So did anyone find a way to get their phone back to the correct firmware and update successfully afterwards?
T.R.A.N.C.E. said:
I've got the same issue as windwave, my F400L came with F400K firmware and I can't update. So did anyone find a way to get their phone back to the correct firmware and update successfully afterwards?
Click to expand...
Click to collapse
I was able to use a modified F400K .dll from another thread here, from there I was able to restore to the latest 10g factory firmware and re-flashed it again with the stock .dll.
OZJeff said:
I was able to use a modified F400K .dll from another thread here, from there I was able to restore to the latest 10g factory firmware and re-flashed it again with the stock .dll.
Click to expand...
Click to collapse
Hello OZJeff! I need your help! I have the same problem with you. Which thread that I can download the modified F400K .dll? Thanks a lot!:crying:
bardochu said:
Hello OZJeff! I need your help! I have the same problem with you. Which thread that I can download the modified F400K .dll? Thanks a lot!:crying:
Click to expand...
Click to collapse
Hello... I got the link to download the modified F400K .dll from this thread:
http://forum.xda-developers.com/lg-g3/help/help-flash-f400k-to-d855-load-t2801028
Cheers.
OZJeff said:
Hello... I got the link to download the modified F400K .dll from this thread:
http://forum.xda-developers.com/lg-g3/help/help-flash-f400k-to-d855-load-t2801028
Cheers.
Click to expand...
Click to collapse
Oh! U are so nice! good egg!:victory: My G3 born again! Thank you so much!

KDZ Upgrading enquiry!

Hey! So I am a noob in Lg G4 developing and stuff!
So heres the question, I don't have rooted system or unlocked bootloader, so if I were to Upgrade my G4 H815 from 10D to 20B , what files will I have to flash, like I am downloading the system file , do I also have to flash the modem bootloader Boot , or is the system file enough ?
I am using lg Up to upgrade, so I have no idea what am I doing
All you need in the right kdz file you want to flash and LGUP software on your windows computer.
Thats it...
Good luck.
awes0me1 said:
All you need in the right kdz file you want to flash and LGUP software on your windows computer.
Thats it...
Good luck.
Click to expand...
Click to collapse
Yea, I figured it out later, I was downloading the wrong files thanks!
Yes kdz file is the one you need to flash via LGUP since I had a lot of trouble myself with my LG I've become a little bit of an expert. You can pm me if you need any help Cheers
EDIT: Check this thread for further information

Cannot downgrade from MM - Tried all options!

Hello all,
I have a LG G3 D855P Brazilian model.
I've updated my G3 to Marshmallow via the LG Flashtool 2014 using this method:
http://www.android.gs/manually-update-lg-g3-to-android-6-0-using-marshmallow-kdz-and-flash-tool/
I have also installed TWRP to root it in MM.
My phone is working fine, but I want to revert back to official KK or LL. The problem is that I am now unable to restore it back to factory. I have tried the following options:
1. Using the LG FlashTool v1.8.6.527 with LGD855AT-00-V10e-EUR-XX-JUL-08-2014-16G+0.tot and LGD855_20140526_LGFLASHv160.dll.
Doesn't work. The FlashTool complains the device model is wrong (should be D855 when it's actually D855P)
2. Using the LGUP tool. Doesn't work also. It gets stuck at the "Start TOT Download" part (9%) and it never finishes.
What are my options? As far as I know, the TOT file I've been trying to use is the correct one.
Thanks in advance!
Try to change the dil file.if you have kit Kat kdz file.extract dll from that.this method solved my problem .
Jahanzaibawan said:
Try to change the dil file.if you have kit Kat kdz file.extract dll from that.this method solved my problem .
Click to expand...
Click to collapse
Sorry, how do I exactly extract the dll from a kdz?
donatello88 said:
Sorry, how do I exactly extract the dll from a kdz?
Click to expand...
Click to collapse
Use kdz firmware extractor tool .
http://forum.xda-developers.com/showthread.php?t=2600575
What MM are you using now? So far as I know you can donwgrade from MM to LP, not KK, using the LGUP tool.
If I were you, I'd unroot or reflash the MM. Then downgrade to LP. Try to use KDZ files,

Tot or Kdz?

I want to clean wipe my lg g3 and install stock firmware. The two methods I discovered was kdz method and tot method. Are these two methods the best or are there other ways I don't know about? What's the difference between these two methods and which should I use to wipe everything off my phone to make it as if it was new from the factory?
You should use kdz as there are no tot files for the latest firmwares.
MESA said:
You should use kdz as there are no tot files for the latest firmwares.
Click to expand...
Click to collapse
Thanks for the reply. What exactly is the difference between the two and should I use cse flash?
Lg phone said:
Thanks for the reply. What exactly is the difference between the two and should I use cse flash?
Click to expand...
Click to collapse
After some reading(I may be wrong, if someone knows better, correct me.)
tot files requires a dll file to be flashed.
tot files are released for upgrades that can't be downgraded. This makes sense for me as all tot files are from KK, there are no LP and MM tot files.
I never used lg flash tool 2014, only LGUP with kdz files and it works without issues.
MESA said:
tot files requires a dll file to be flashed.
tot files are released for upgrades that can't be downgraded. This makes sense for me as all tot files are from KK, there are no LP and MM tot files.
Click to expand...
Click to collapse
Sorry this is confusing. KK is a downgrade from LP and MM. What do you mean by "tot files are released for upgrades that can't be downgraded." LG flash tool is easier.
Lg phone said:
Sorry this is confusing. KK is a downgrade from LP and MM. What do you mean by "tot files are released for upgrades that can't be downgraded." LG flash tool is easier.
Click to expand...
Click to collapse
I mean there are tot files for the first KK update, you can't downgrade lower than that, because that is the first one. This is my thoughts, I may be completely wrong here [emoji3]
is there any available file of kdz nougat version? im looking forward to upgrade my lg g3 korean version i have already 6.0 as of now there is no issue or bug from it

big problem

my brother flash my phone h81520g with a kdz h818 how can i change it back pls help :'(
i use kdz h81520g but LGUP say kds invalid
The first step is to admit it was you
help pls
darkvidouka said:
my brother flash my phone h81520g with a kdz h818 how can i change it back pls help :'(
i use kdz h81520g but LGUP say kds invalid
Click to expand...
Click to collapse
You must use a hex editor and change the h815 kdz to make it look like the h818 so you can flash it
Use the search to find the guide for this here on XDA
Sent from my OnePlus 6T using XDA Labs
i didn't find it can you give it to me with steps pls i m noob on that
https://www.photobox.co.uk/my/photo/full?photo_id=501725780524
I flashed a h818 LP rom and was able to clean flash straight to a h815 LP rim with FIsH no problem
Omg my phone don't work no logo just i see bleu led i can only use usb cable with sound+ to flash it
Helllllllp pls
https://youtu.be/Bpme4mpZp9k
The same in video
darkvidouka said:
The same in video
Click to expand...
Click to collapse
If a h815 won't work try a h818 LP kdz with lgup , remember to "refurbish"
Try to root it and install twrp-in-fish
I flashed camuix on my rooted h815t with fish and it screwed up but I was easily able to wipe it in fish and install genesys LP rom
*I take no responsibility for what you decide to do.*

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