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LG G3 D855 5.1.1 Security Error at startup

halp
Hi good people I got problem with my LG G3 D855 I don't know it's European or what but I'm using in south Africa when I'm trying to switch ON it says LG SECURITY ERROR and goes OFF it was rooted and visions was 5.1.1 I even try to flash it with LG flash tool but it's not conecting:crying: now i don't know what to do plz I need help plz

You can check this out.
Probably if you have access to custom recovery and you change the kernel could fix the security error.If not you could try to flash a stock firmware with flash tool and reroot your phone.
[Guide] LG G3 Stock Firmware (Go Back to Stock) KDZ & TOT Method

moon125 said:
Hi good people I got problem with my LG G3 D855 I don't know it's European or what but I'm using in south Africa when I'm trying to switch ON it says LG SECURITY ERROR and goes OFF it was rooted and visions was 5.1.1 I even try to flash it with LG flash tool but it's not conecting:crying: now i don't know what to do plz I need help plz
Click to expand...
Click to collapse
Surely you're not referring to the "Secure Boot Error"?
It happens for recovery access or affects the normal bootup too?
In both cases you have to put device in Download Mode and flash a "bumped" recovery (TWRP is highly preferable).
If the issue persists, you have to restore the stock rom with the LG Flash Tool 2014 by doing a "CSE flash" and lose all data.
If you not solve, your device is officially compromised and ****ed up.
The warranty won't guarantee assistance for broken phone with custom rom or recovery installed.

have to leave my dedicated carrier forum to get answers for KDZ and or tot method

Multiple threads little to no replies besides sensless info that ive already tried
CAN TOT METHOD WORK ON TMOBILES VARIANT G4 AND IF SO WHERES THE LINK FOR THE TOT FILE NOT KDZ!
Tmobile g4 forum is helpless after days and 100s views
this is my last hope. I Have a tmobile lg g4 model. I hapened to relock the bootloader while i was still on a rom and rooted with twrp, but i do have download mode and only download mode .I dont have a bootable o.s
Ive tried and tried and tried to get lg UP Tool which is a joke its not really a true unbrick tool cause if you bricked yourself on a rom and not the stock firmware its useless .All you get is device model unknown. This is supposedly cause custom roms are edited. Lg bridge does not work as a brick tool either it just states wether your firmware is up to date . The only hope was lg flash tool 2014 but that im told and seems to be outdated not compatible with any g4 on android 6.0.... Im at a loss here i can get into dload mode thats it the phone charges in download mode also and it also is recognized by pc meaning drivers are installed because lg mobile support tool sees my device and says its up to date.
s
Some members have been in my same scenario relocked bootloader with a rom and twrp with nothing but download mode and swear they fixed it with lg bridge tool using the update recovery error link within the tool.
Can anyone confirm if im screwed or if i am doing something wrong this is day 5 now im ready to toss the g4 in the trash for the sake of my sanity.

Closed at OP's request

(LG G3 F400L) how upgrade to marshmallow

Hi Guys!!!
I'm using LG g3 f400l and i'm back to stock rom
how to upgrade to marshmallow?the safest method
Because i flash the wrong recovery earlier and i hardbricked it
so I do not want that happening again to my g3
so pls can anyone help me with this and guide me to upgrade my lg g3 to marshmallow

Stiffmeistro said:
Hi Guys!!!
I'm using LG g3 f400l and i'm back to stock rom
how to upgrade to marshmallow?the safest method
Because i flash the wrong recovery earlier and i hardbricked it
so I do not want that happening again to my g3
so pls can anyone help me with this and guide me to upgrade my lg g3 to marshmallow
Click to expand...
Click to collapse
1. Go to LG's website.
2. Search for the correct product depending on your location/provider.
-D855 (Europe)
-D850 (AT&T)
-D851 (T-Mobile)
-D852 (Canada)
3. Press the "product support" button on the page of your selected phone.
4. Press the Software Update and Drivers link.
5. Follow the steps from the official LG website and you're done.

LG G3 soft bricked!! flashed wrong firmware

Heloo everone i am from INDIA
recently i purchased and refurbished lg lg3 within setting i could se it was D855 but on body it was D850
so i thoguhts its D855 because software it was running was D855 but then i flashed D855 firmware to update it and it is soft bricked i direct goes to download mode and nothing works
I took it to a shop he tried sevelar firmware at once i got it boot up but no camera wifi no modem, so it was not the correct one,
So is thier a way i can get it working?
How could i figure it is sprint at&t or verzion??? because it was an cdma set,
Cm13 or stock rom anything could work for me
Anyone please give me a procedure will b thankful to U.... :crying:

I you are able to access download mode, try and flash the latest marshmallow KDZ for D855. My device also has D850 on the back but it has the D855 software.

youssefkr said:
I you are able to access download mode, try and flash the latest marshmallow KDZ for D855. My device also has D850 on the back but it has the D855 software.
Click to expand...
Click to collapse
an you give me the link u have flashed on your device n tool n procedure you sued to flash it??
will b thank full 2 u

happy3777 said:
an you give me the link u have flashed on your device n tool n procedure you sued to flash it??
will b thank full 2 u
Click to expand...
Click to collapse
First open up your phone,exact model will be on the board.then flash accordingly software.

Jahanzaibawan said:
First open up your phone,exact model will be on the board.then flash accordingly software.
Click to expand...
Click to collapse
I know already tried But it was D855 already tried n that caused soft bricking....

Can't detect the model

Hi Guys
I lost my mind
I feel disappointed of my LG G3
it can't be detected the MODEL (D855) by LG Up and LG flash tool
it boot on recovery but can't do anything