Unable To UNROOT LG G3 Korea, Help! - G3 Q&A, Help & Troubleshooting

So I bought a rooted LG G3 Korean version (back then i didn't know it was rooted). MODEL d855.
So I looked it up how to unroot it and I found many solutions on how to unroot it, but most of them used LGFlashTool so i went with that method; had everything downloaded but i couldn't find any firmware documents for LG G3 Korean version, so i used different ones such as: European, Hong Kong and many others that i can't remember but all seem to fail to download, all of them stopped at 6% after my failure I decided not to unroot it. But whenever I turn my phone it goes to download mode/firmware update. I have tried holding multiple buttons and taking the battery in and out but nothing seems to work. So now i'm here with my new phone stuck in download mode.
Can anyone help me Unroot it or find a way to exit download mode? I just want my phone back cuz right now it was a waste of money.

LetTheWolfsMeow said:
So I bought a rooted LG G3 Korean version (back then i didn't know it was rooted). MODEL d855.
.
Click to expand...
Click to collapse
what i know is that D855 is the international version, While korean version have a F400 model number with a suffix base on their service provider in Korea (e. F400L for LG U+)
it seems that you need to flash the correct firmware to recover your phone. (it's important to know what model number you have)

Dyeko said:
what i know is that D855 is the international version, While korean version have a F400 model number with a suffix base on their service provider in Korea (e. F400L for LG U+)
it seems that you need to flash the correct firmware to recover your phone. (it's important to know what model number you have)
Click to expand...
Click to collapse
My knowledge on phones isn't that great but before i tried to unroot it i looked up how to find my model number and somewhere in the settings i found that it was the D855 and under my battery it says D855 and under that it says made in Korea.
So the Koreans have the F400 but i have the Korean D855, well now i'm totally confused

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[Q] Motherboard Changed From E988 to a E980 at LG Service Centre?

Hi guys in urgent need of your opinions. When I went to an LG service centre after my phone died they replaced my mobo (E988 Singapore) with an E980 one. Soon after before I managed to root and unlock its bootloader I checked through the device details and the funny thing is that I realised it doesn't tally with any AT&T or non-AT&T E980 models as the model number was just listed as E980 and if I remember correctly the version number for the firmware listed it as an EU device?
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I think you'd be fine just treating it as an e980 and flashing back to stock
So I should just use any of the E980 kdz? I don't wanna risk hard bricking the device but I'll try it when I get the chance.

Lg G3 stuck on LG logo after Android 6. Cant use FlashTool

Hi,
So someone gave me a LG G3 which he updated to "D85530C_00_0211.kdz". After that the phone stuck in the LG logo and it rarely loads the phone but it freezes. I can barely unlock the phone sometimes but usually it doesn't recognise the touch.
Neither the PC is recognising the phone.
I tried to use LGFlashTool with TOT file but after "READY" when I unplug and plug again it says "Download Fail".
I also tried with the older LGFlashTool using the KDZ but still didn't work. It only worked with the KDZ above, which is the same software and again it is freezing.
LGUP isn't working too.
Any help/suggestions?
P.S.
Maybe I'm using wrong TOT/KDZ?
-The version he updated and also I was able to install is D855
-Under the battery writes "Made in Korea" which may be a Korean phone but Korea doesn't have D855
-I searched on imei.info the IMEI number and it says Carrier Poland.
-I tried using Poland KDZ, Hong-Kong TOT (because they have d855) and Europe TOT(which also has d855)
-The phone is 16GB
I do believe that your board is not of d855. It happened to me a month ago. When I opened the phone.I saw d850 written on my board.so that might be the problem.
Jahanzaibawan said:
I do believe that your board is not of d855. It happened to me a month ago. When I opened the phone.I saw d850 written on my board.so that might be the problem.
Click to expand...
Click to collapse
It says D855 behind the phone. Also all parts do write D855 and a number near by. So it must be a D855.

Can I update from kitkat directly to marshmallow? Plz help

Hello, I recently bought this phone G3 model D855 and would like to install the latest stock marshmallow version. Right now I have 4.4.2, so I am wondering if it is safe to flash marshmallow direct or do I need to update it to lollipop first. Also if you can direct me to the files I need and the procedure. Thanks
Some info about my device
Android 4.4.2
Kernel version 3.4.0
Buils number KVT49L
Software version D85510n
It is rooted
Also I checked the imei number on several sites, and it is showing Sprint as carrier, model LG LS990 suffix ASPRTN how is that possible if its model is D855, which is also printed back inside the cover. Also my imei ends with 855, so which firmware should I install for Sprint LS990 or D855 model?
Kashi88 said:
Also I checked the imei number on several sites, and it is showing Sprint as carrier, model LG LS990 suffix ASPRTN how is that possible if its model is D855, which is also printed back inside the cover. Also my imei ends with 855, so which firmware should I install for Sprint LS990 or D855 model?
Click to expand...
Click to collapse
Download LG PC Suite,install it.
Connect your phone to your PC and it will automatically detect and ask you to install the firmware update.

LG G4 has different model numbers, cant find stock firmware.

Hello i need help with my LG G4. Am trying to find the offical firmware but i have failed.
The phone model number in the settings says H818, the back sticker under the battery say H815 and the model number on the mother board says F500L.
Before it had lollipop and was working well so i tried to upgrade to 6.0 and thats when issues sarted. After upgrade it works but the network is not working.
I tried to use the LG Bridge to get the firmware and it got me F500K so when i tried to install it failed.
I have tried to install several firmwares using the LGUP but all fail bringing me an error of kdz is invalid.
I have tried the LG Flash Tool and it have failed too.
Can anyone hlep me find the stock firmware for this phone.
Check your box
Sent from my SM-G610F using Tapatalk
I bought the phone from a friend so it has no box
If it's a single SIM and not from America, probably H815.
Sent from my SM-G610F using Tapatalk
Power off take the back off pull the battery out there is a sticker that will have the imei number that is we're you will also find the model of your device.
Its i single sim. Back sticker says h815, setthings say h818 and mother board says f500l
sharpnic35 said:
Its i single sim. Back sticker says h815, setthings say h818 and mother board says f500l
Click to expand...
Click to collapse
If motherboard says F500l then it's a F500l
Sent from my iPhone using Tapatalk
sharpnic35 said:
Hello i need help with my LG G4. Am trying to find the offical firmware but i have failed.
The phone model number in the settings says H818, the back sticker under the battery say H815 and the model number on the mother board says F500L.
Before it had lollipop and was working well so i tried to upgrade to 6.0 and thats when issues sarted. After upgrade it works but the network is not working.
I tried to use the LG Bridge to get the firmware and it got me F500K so when i tried to install it failed.
I have tried to install several firmwares using the LGUP but all fail bringing me an error of kdz is invalid.
I have tried the LG Flash Tool and it have failed too.
Can anyone hlep me find the stock firmware for this phone.
Click to expand...
Click to collapse
franken phone.. mean phone refurbished by other variant parts.. even they can edit software .. best thing to do is... open up phone and look at the motherboard model.. what ever the motherboard says thats your variant.. you have to phisically see it with your own eyes.. not by looking in software they also edit that..
Wen i checked the mother board, thr was F100L MAIN
sharpnic35 said:
Hello i need help with my LG G4. Am trying to find the offical firmware but i have failed.
The phone model number in the settings says H818, the back sticker under the battery say H815 and the model number on the mother board says F500L.
Before it had lollipop and was working well so i tried to upgrade to 6.0 and thats when issues sarted. After upgrade it works but the network is not working.
I tried to use the LG Bridge to get the firmware and it got me F500K so when i tried to install it failed.
I have tried to install several firmwares using the LGUP but all fail bringing me an error of kdz is invalid.
I have tried the LG Flash Tool and it have failed too.
Can anyone hlep me find the stock firmware for this phone.
Click to expand...
Click to collapse
The board version is F500L. But the software is of H818. Therefore flash tools would see the phone as H818 and generate invalid file error for any firmware other than H818. So you can recover it installing different firmwares of H818.
You can get its LP 10e here and 10b here.
By the way, how did you upgrade from LP to MM? Means using which tool?

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