Develop Bugs

Lg G3 secure booting error

Hey guys yesterday I flashed cm 11 on my phone .when I rebooted device my phone wouldn't start and it showed secure booting error ..I can go to download mode but not recovery ..also I had to flash boot.img which I forgot ..I can flash boot.img now but the problem is my pc won't recognise my phone ..it shows :
LGE android MTP device failed
LGE Mobile USB Modem failed
what should I do ? Is my phone bricked ? Please help .

From the sounds of it try to get to dl mode and restore stock firmware sounds like ure image wasnt bumped

Just get into download mode and flash a KDZ with CSE Flash option via LG Flash Tool 2014

successfully flash a kdz but still having Boot loop issue

Hi all
I have done my best to search all the possible solution on xda as well as google, and I don't think I found the answer.
Basically, my phone (for some unknown reason) now suddenly have the boot loop issue.
I first tried to use the LG PC suite, but it is never able to find the phone when it is connected in download mode.
I then tried to use the LG Flash Tool v.1.18 to flash a stock rom in download mode, but failed, due to the following error (of course USB driver is installed, and COM41 changed)
Code:
PID: Null
IMEI: Null
Model :
DLL: D855
BIN: LGD855AT-00-V10g-222-99-JUL-14-2014-16G+0.TOT
SWV:
SWOV:
Model Information Check Fail
000000000
Finally I use LG Flash Tool 2014 to flash a stock KDZ image, using CS_emerengcy and CES flash, the KDZ image is obtained from the LG dev using my own IMEI. This method actually works, but after it reboots, and goes into the Android Setup wizard, it restarts itself and stuck in boot loop again!
So what may I do please? I am very stuck and have no clue.

luckyvictor said:
Hi all
So what may I do please? I am very stuck and have no clue.
Click to expand...
Click to collapse
Did u try booting into recovery and doing a factory data reset after flashng?

LG G4 H815 stuck, download mode only, no adb

Hello hello,
I unlocked bootloader, installed TWRP 2.8.7.0 (adb -> fastboot method) and then I flashed SuperSU 2.46 zip. After reboot from TWRP my phone stuck.
I can't access TWRP or i don't know how to…
System isn't starting BUT sometimes after few minutes of seeing LG logo i see standard wallpaper and suddenly animation freezes. That's all.
When i go to recovery mode (voldown+power, release power and press power again) I can "do" factory reset. I choose 2xYES and i see green android. Then phone is restarting but i should enter to TWRP, right?
I tried to flash stock system (kdz, tot, dz) via:
- LG Flash Tool 2014
- LG Flash Tool 1.8.6.527
- LGUP
- LG Bridge
but nothing…
My phone PID and IMEI is null :/ (and "CUMSS" to :?)
I tried fix that with QPST (2 different versions) but in device manager my phone is only detected as COM port. No "Android Device". I can't read and write anything…
adb isn't working
I tried all USB 2.0 ports, different drivers, roms (even not for 815), dlls.
I fought 3 days and still have brick, not smartphone
I have only download mode working.
I can send commands to com port (Send_Command.exe) but sometimes nothing happen, sometimes i see "fail" after sent command.
Any ideas? Can I install recovery through download mode? Or maybe somebody know how to send files to phone in download mode but without adb?
I had stock rom MM V20L. What else you need to know?
Thanks for any suggestions, sorry for chaos in post and my english.

After trying different roms in different programs with 3 versions of dlls and different drivers…
I found solution: just reinstalled .NET Framework and then finally i flashed by LGUP (refurbish, v20L, kdz, dll 0.0.3.23)!
Welcome back H815

2 0 said:
After trying different roms in different programs with 3 versions of dlls and different drivers…
I found solution: just reinstalled .NET Framework and then finally i flashed by LGUP (refurbish, v20L, kdz, dll 0.0.3.23)!
Welcome back H815
Click to expand...
Click to collapse
where did you founf v20L kdz i need it because my phone wont flash any kdz i think its to prevent downgrades

https://lg-firmwares.com/lg-h815-firmwares/

Try some from skdubg's link. This is probable the same as mine
PLS Europe PL/Poland H81520l_00_0928.kdz 1.68 G 2016-11-25
Click to expand...
Click to collapse
download-file/?fileId=4325 I can't post links
This is MD5 of my file 8f685baf42869c50ec5f1b7770aa3957 *H81520l_00_0928.kdz
If you still can't flash then i will upload my kdz somewhere. GL

LG G4 Model F500L Stuck on download mode After Downgrade
Hi
i have a problem with my LG G4 Model F500L i try to downgrade from Marsmallow to Lolilpop By Flashing with LGUP Tool when i flash it. it error at 16% boot fail. So i disconnect USB and pull out battery and when i turn on it stuck on download mode.. i have try to flash with any firmware and any LG Tools but it's still fail at writing boot step i had try with Optopus box but it's still fail at wrting boot fail what is the problem . i need help now.... i just bought my phone for a week. Thanks for your helping ....

LG G3 Brick, i try all

Hello I read all threads with brick text, i try all and i cant to unbrick my phone.
I try to update my lg g3 but i block the bootloader or something, then i enter in fasboot and i delete recover and follow this tutorial
http://forum.xda-developers.com/android/general/unbrick-lg-model-download-recovery-t3060184
With this i sure make a mistake, i upload all from 30b version, and in the tutorial dont say i need to flash custom1 and custom2, so i didnt... then i get out from fastboot and now i enter in download mode. I use flash tool 2014 and flash tool for tot files, with 2014 not work, with tot file it starts (i try with 10a and 10e version) but try to delete custom partition and fails in 6% says this
[17: 7:55] Can not find Parition name : cust
and not work any more.
I think the problem is that is expected 30b with custom partition and is not there, so it not continue. Any ideas what can i do?

Orko2002, can you enter to download mode ?

UvarovG said:
Orko2002, can you enter to download mode ?
Click to expand...
Click to collapse
Yes is the only mode i cant enter, download mode (pressing vol +) and got to upload firmware screen. I connect to flash tool and up to 6% and crash.
I try factory reset (power + vol -) it says ok but nothing happends... now if i power normal, lg logo starts, says boot verification fails, and the screen goes black.

>I connect to flash tool and up to 6% and crash.
What happens if try to restore stock rom via "LG Mobile Support Tool" ?

UvarovG said:
>I connect to flash tool and up to 6% and crash.
What happens if try to restore stock rom via "LG Mobile Support Tool" ?
Click to expand...
Click to collapse
Thanks for reply!
When i open lg mobile support tool and connect the cel on download mode, the LGST doesn´t detect the mobile....
I go to admnistrative tools and see the cel on COM41 but the tool doesnt detect it. Can i do something to detect?
Anyone knows where download 30c or 30b tot file? i cant find it, to try with a new tot

[deleted]

LG G4 H818N Stuck in Download Mode

Hi, I've been trying to fix my H818N from the past couple of days.
Here is what I did to brick it, unfortunately
1. Downloaded Nougat 7.0 TOT file (H818P v29a TOT) from this website: androidsage lg g4 android 7 0 nougat firmware
2. Started my G4 into download mode and tried to load this TOT file using LG UP, however, LG UP stopped me by displaying an error message: Invalid TOT file
3. Then I used WinHex to change H818P to H818N in the TOT file and saved it
4. Now I was able to upload this file to my G4 in Refurbished mode using LG UP, the upload completed, phone rebooted and displayed: Erasing
5. After that it is stuck in download mode (If I restart it, it displays LG logo and starts download mode automatically)
6. In Download mode, my phone displays this at the bottom of screen:
U 633A s12. 0 AS10. 5 B100 UHS
S U LG-H818N 07.0 Hrev_10 .CPU4
H81529a
Here is what I did till now without any success:
1. installed the latest LG drivers, LG UP, and LG Flash tools on my PC
2. Tried to Flash the following firmwares using LG UP/ LG Flash Tool (I also extracted the dll file from each firmware one by one and placed in the model folder for LG UP while trying)
H815 V20o Modded.kdz
H818N10l_00_0113.kdz
H818N20f_00_0818.kdz
H818N20h_00_1019.kdz
H81520p_00_0403.kdz
H81820p_00_0314.kdz
Hong Kong H818N10b.kdz
H81520p_00_0314.kdz
H815TR20g_00_0428.kdz
F500K20C_00.kdz
All the firmwares get stuck at Internal command failed 9%, 11%, 24%
3) I have scoured the internet but wasn't able to find a solution yet
4) I even tried using the fastboot mode but unfortunately the bootloader is locked and I cannot erase the recovery or image
Now I'm not sure what else can be done to bring my phone back to life. I might try to get it into Qualcomm 9008 mode and try to unbrick it by following this guide: pakfones unbrick lg g4 hard bricked
Any help on this will be much appreciated

tgunn said:
Hi, I've been trying to fix my H818N from the past couple of days.
Here is what I did to brick it, unfortunately
1. Downloaded Nougat 7.0 TOT file (H818P v29a TOT) from this website: androidsage lg g4 android 7 0 nougat firmware
2. Started my G4 into download mode and tried to load this TOT file using LG UP, however, LG UP stopped me by displaying an error message: Invalid TOT file
3. Then I used WinHex to change H818P to H818N in the TOT file and saved it
4. Now I was able to upload this file to my G4 in Refurbished mode using LG UP, the upload completed, phone rebooted and displayed: Erasing
5. After that it is stuck in download mode (If I restart it, it displays LG logo and starts download mode automatically)
6. In Download mode, my phone displays this at the bottom of screen:
U 633A s12. 0 AS10. 5 B100 UHS
S U LG-H818N 07.0 Hrev_10 .CPU4
H81529a
Here is what I did till now without any success:
1. installed the latest LG drivers, LG UP, and LG Flash tools on my PC
2. Tried to Flash the following firmwares using LG UP/ LG Flash Tool (I also extracted the dll file from each firmware one by one and placed in the model folder for LG UP while trying)
H815 V20o Modded.kdz
H818N10l_00_0113.kdz
H818N20f_00_0818.kdz
H818N20h_00_1019.kdz
H81520p_00_0403.kdz
H81820p_00_0314.kdz
Hong Kong H818N10b.kdz
H81520p_00_0314.kdz
H815TR20g_00_0428.kdz
F500K20C_00.kdz
All the firmwares get stuck at Internal command failed 9%, 11%, 24%
3) I have scoured the internet but wasn't able to find a solution yet
4) I even tried using the fastboot mode but unfortunately the bootloader is locked and I cannot erase the recovery or image
Now I'm not sure what else can be done to bring my phone back to life. I might try to get it into Qualcomm 9008 mode and try to unbrick it by following this guide: pakfones unbrick lg g4 hard bricked
Any help on this will be much appreciated
Click to expand...
Click to collapse
Hi.. any help on this please

tgunn said:
Hi.. any help on this please
Click to expand...
Click to collapse
I had similar. LG Bridge helped me.

tgunn said:
Hi, I've been trying to fix my H818N from the past couple of days.
Here is what I did to brick it, unfortunately
1. Downloaded Nougat 7.0 TOT file (H818P v29a TOT) from this website: androidsage lg g4 android 7 0 nougat firmware
2. Started my G4 into download mode and tried to load this TOT file using LG UP, however, LG UP stopped me by displaying an error message: Invalid TOT file
3. Then I used WinHex to change H818P to H818N in the TOT file and saved it
4. Now I was able to upload this file to my G4 in Refurbished mode using LG UP, the upload completed, phone rebooted and displayed: Erasing
5. After that it is stuck in download mode (If I restart it, it displays LG logo and starts download mode automatically)
6. In Download mode, my phone displays this at the bottom of screen:
U 633A s12. 0 AS10. 5 B100 UHS
S U LG-H818N 07.0 Hrev_10 .CPU4
H81529a
Here is what I did till now without any success:
1. installed the latest LG drivers, LG UP, and LG Flash tools on my PC
2. Tried to Flash the following firmwares using LG UP/ LG Flash Tool (I also extracted the dll file from each firmware one by one and placed in the model folder for LG UP while trying)
H815 V20o Modded.kdz
H818N10l_00_0113.kdz
H818N20f_00_0818.kdz
H818N20h_00_1019.kdz
H81520p_00_0403.kdz
H81820p_00_0314.kdz
Hong Kong H818N10b.kdz
H81520p_00_0314.kdz
H815TR20g_00_0428.kdz
F500K20C_00.kdz
All the firmwares get stuck at Internal command failed 9%, 11%, 24%
3) I have scoured the internet but wasn't able to find a solution yet
4) I even tried using the fastboot mode but unfortunately the bootloader is locked and I cannot erase the recovery or image
Now I'm not sure what else can be done to bring my phone back to life. I might try to get it into Qualcomm 9008 mode and try to unbrick it by following this guide: pakfones unbrick lg g4 hard bricked
Any help on this will be much appreciated
Click to expand...
Click to collapse
Hi friend,
No issues, even I faced the same problem. Now everything ok, just click this link https://forum.xda-developers.com/g4/general/update-lg-g4-h818p-to-android-7-lg-h815-t3677485/page5
and go to that page, you may find the post by esco_448
Modified KDZ link to downgrade from nougat to Marshmallow
https://mega.nz/#!BKRnDLIZ!K46qoXNhW...XJDd9MhuNdb-WA
Also please use this dll with LGUP.
https://mega.nz/#!lShUlbgK!ZjNfIbPSv...ZDThw7HQ7ZZkKU
In addition edit the downloaded file, with winhex, then do the normal procedure as you do before, thats all.
Good luck
Sangames