Develop Bugs

Secure Booting Error! Cause: boot certification verify

Good day mate. My brick phone is F460S variant. I got this error when I tried to go back to Lollipop using Lg flash tool 2014, it got stuck on 5% and remove usb cable and start again, after that I got this error Secure Booting Error! Cause: boot certification verify.
No download mode
No recovery
anyone can help me please?:crying:

anyone?

You have triggered the downgrade QFUSE. There is nothing you can do apart from trying to unbrick it like it was dead, but that's not guaranteed to work. You should have researched more before attempting this. My prototype doesn't have a QFUSE, so i am free to downgrade via TOT to kitkat or lollipop.

西村大一 said:
You have triggered the downgrade QFUSE. There is nothing you can do apart from trying to unbrick it like it was dead, but that's not guaranteed to work. You should have researched more before attempting this. My prototype doesn't have a QFUSE, so i am free to downgrade via TOT to kitkat or lollipop.
Click to expand...
Click to collapse
What does QFUSE mean?

anmino said:
What does QFUSE mean?
Click to expand...
Click to collapse
I second you on this. I just uninstalled MultiROM and got the secure booting error. Depending on the ROM you have, find a bumped kernel and flash it. Most of the kernels on XDA are pre-bumped unless the developer states so. Boot into recovery, tutorials on the internet, then flash the kernel and voila.

if you can use twrp or you're able to flash, use mr_bump.zip: https://mega.nz/#!DNwhRBrK!Ki6zIzXca0KjPShi6L2oaCYIr0CkmH8sEymEt-0Q3ys
oh sorry, I didn't see "no recovery".

HardStyl3r said:
if you can use twrp or you're able to flash, use mr_bump.zip: https://mega.nz/#!DNwhRBrK!Ki6zIzXca0KjPShi6L2oaCYIr0CkmH8sEymEt-0Q3ys
oh sorry, I didn't see "no recovery".
Click to expand...
Click to collapse
Yes, no DOWNLOAD mode and RECOVERY mode.. Anyone have an idea how to fix this?

anyone?

Hello, i got the same probleme and i've trying a lot of things but not resolved..
My phone is a LG G3 Beat F470s..
Please help us..

Dowblnload adb and fastboot drivers
Download laf.img for your device
Download LG Drivers
Get you G3 to fastboot mode. Hold volume up and connect it to PC
Open fastboot and adb folder in PC, ctrl+shift+right click and open cmd. Type fastboot devices...if ur device is listen then proceed, if not u did not do something cotrectly...if yes just flash laf img to your G3 and voila

I remember me that I was in the same situation:
No TWRP, no download mode, so i have use in pat this thread:
https://forum.xda-developers.com/showthread.php?t=1752270
And an other that i haven't found again (xda thread), in some lines:
=> download the last img file from: https://eu.dl.twrp.me/d855/
=> no download mode available so no possibility to flash manually twrp file from an LG Flash Tool
==> so setup an adb connexion to the phone, cp command to copy the img file on the sdcard or where you want
=> command: "flash recovery twrp-2.8.x.x-xxx.img" (https://www.xda-developers.com/how-to-install-twrp/
=> if it's as worked, you could reboot manually in twrp, make again the partitions if needed and flash any ROM.

LG G7 - Fastboot bootloop [SOLVED]

After trying to flash Pie my G7 stuck in fastboot mode. Download mode is unavailable so I not can reset the stock ROM.
After it reboots it boots into only to fastboot mode and is stuck in a loop now.
An even bigger problem is that now the bootloader is locked and the unlock.bin file can not unlock the bootloader.
ADB mode is not working!
DOWNLOAD mode is not working!
SYSTEM mod does not work!
There is only FASTBOOT mode that is in the loop
Does anyone have any suggestions?

Prosjak said:
After trying to flash Pie my G7 stuck in fastboot mode. Download mode is unavailable so I not can reset the stock ROM.
After it reboots it boots into only to fastboot mode and is stuck in a loop now.
An even bigger problem is that now the bootloader is locked and the unlock.bin file can not unlock the bootloader.
ADB mode is not working!
DOWNLOAD mode is not working!
SYSTEM mod does not work!
There is only FASTBOOT mode that is in the loop
Does anyone have any suggestions?
Click to expand...
Click to collapse
Try to get into lgup to flash a kdz, if you cant do that you might be SOL

LGUP does not detect phone, download mode is not working

hi
Prosjak said:
LGUP does not detect phone, download mode is not working
Click to expand...
Click to collapse
Please contact me, I can help you recover the device

PjLyTam said:
Please contact me, I can help you recover the device
Click to expand...
Click to collapse
How to contact you and how you can help me.
If you want to help write this here to help this benefit to anyone who has this or similar problem
Thank you

Prosjak said:
After trying to flash Pie my G7 stuck in fastboot mode. Download mode is unavailable so I not can reset the stock ROM.
After it reboots it boots into only to fastboot mode and is stuck in a loop now.
An even bigger problem is that now the bootloader is locked and the unlock.bin file can not unlock the bootloader.
ADB mode is not working!
DOWNLOAD mode is not working!
SYSTEM mod does not work!
There is only FASTBOOT mode that is in the loop
Does anyone have any suggestions?
Click to expand...
Click to collapse
Fastboot --set-active=a

LameMonster82 said:
Fastboot --set-active=a
Click to expand...
Click to collapse
Thank you for your reply
The problem is that the bootloader is locked
C:\ADB>Fastboot --set-active=a
Setting current slot to 'a'...
FAILED (remote: Slot Change is not allowed in Lock State)
finished. total time: 0.003s

Problem solved
Octoplus/Octopus LG 2.9.3
Reset FRP Lock
1. Attach testpoint, and connect phone with Micro USB cable (don´t use USB hubs!).
2. Check PC Device Manager, a new device should appear "Qualcomm HS-USB QDLoader 9008" or "Unknown Device" if you hadn´t installed a driver.
3. Release testpoint and press "Reset FRP Lock" button.
Emergency mode
To enter emergency mode, disconnect cable, disconnect battery, press and hold "Vol+" button and connect USB cable.
My lucky day

What version of G7 use?
Sent from my LM-G710 using Tapatalk

PjLyTam said:
Please contact me, I can help you recover the device
Click to expand...
Click to collapse
i got this problem too.. please help with that

Prosjak said:
Octoplus/Octopus LG 2.9.3
Reset FRP Lock
1. Attach testpoint, and connect phone with Micro USB cable (don´t use USB hubs!).
2. Check PC Device Manager, a new device should appear "Qualcomm HS-USB QDLoader 9008" or "Unknown Device" if you hadn´t installed a driver.
3. Release testpoint and press "Reset FRP Lock" button.
Emergency mode
To enter emergency mode, disconnect cable, disconnect battery, press and hold "Vol+" button and connect USB cable.
My lucky day
Click to expand...
Click to collapse
how i can do this?

My G710EM has a problem with my lockback BL. I can't boot the system and it will prompt "Your device has failed a routine safety check and will not boot. This may be a temporary problem. If this message occurs repeatedly, visit this link on Another device and refer to the red case:g.co/ABH Your device will power off automatically after a while.” With LGup brush kdz brush does not go in, fastboot “fastboot flash unlock unlock.bin” prompt is invalid
* Target reported max download size of 536870912 bytes
Sending 'unlock' (1 KB)...
OKAY [ 0.004s]
Writing 'unlock'...
FAILED (remote: Flashing Unlock is not allowed
)
Finished. total time: 0.011s
I don't know what to do.

I had the very same problem as OP. I tried to install pie with LGUP (G710EM20b_00_OPEN_EU_OP_0508.kdz) but ended in fastboot loop.
After whole night of trying different things (being a noob means less sleep) I managed to run the phone in download mode. Starting from there I was able to install my previous rom. Both failed update and rescue operations were done on Win 10.
What I tried and didn't work:
- Fastboot --set-active=a
Code:
C:\ADB>Fastboot --set-active=a
Setting current slot to 'a'...
FAILED (remote: Slot Change is not allowed in Lock State)
finished. total time: 0.003s
- Unlocking with unlock.bin. Didn't save the msg but saw it somewhere in another thread. I needed to install/point drivers first because the device was not recognized in Win.
- Solutions for G6 for going into download mode. The download mode icon was displayed for a second and then going to fastboot again.
- LG Flash Tool 2014 - I just followed a guide for older phones but it didn't work. Didn't try again.
What did work:
1. I found this post on reddit (remove spaces or PM me, I'm not allowed to post links):
Code:
https:// www .reddit. com/r/LGG3/comments/2qe5sr/in_need_of_serious_help_stuck_in_fastbootno/cn5f2qr/?utm_source=share&utm_medium=web2x
Quoting the post
At first, you'll need a working fastboot environment, you'll find out how to set it up on your own. Then you'll need the laf.img, I can upload mine if you want or I could help you extracting one out of a kdz file. Put the laf.img in the same folder like your fastboot.exe, then hold shift and right click, then click on "open command panel here" or however it's called in English. Type "fastboot flash laf laf.img" (Edit: It would probably better to use "fastboot boot laf.img" instead because of the bootloader lock). If that works, you at least have a working download mode.
Click to expand...
Click to collapse
2. I used LG_Firmware_Extract_v1.2.6.1 and extracted dz file from aforementioned pie file. The I extracted two laf files for the kz file. In my case they were: laf.img_180534 and laf.img_81990.
3. I took one of these files (sry, don't remember which one, but they have the same size - didn't check if they're the same) renamed it to laf.img and put a folder where fastboot.exe is.
4. I did
Code:
fastboot boot laf.img
and voila: the phone was in download mode!
5. After that LGUP the previous rom and the phone is working again. Here I needed few tries. At first the were some problems, then I tried different combinations (1.14, 1.15, w/ and w/o uppercut). I think LGUP 1.15 (1.14 with patch) did the work. I was able to "refurbish" the phone.
Hope it's useful for others. If anyone could prepare a guide from this description or/and tell why it worked - please feel free to do so.
I think I will wait some time before trying pie again

Garlikus said:
I had the very same problem as OP. I tried to install pie with LGUP (G710EM20b_00_OPEN_EU_OP_0508.kdz) but ended in fastboot loop.
After whole night of trying different things (being a noob means less sleep) I managed to run the phone in download mode. Starting from there I was able to install my previous rom. Both failed update and rescue operations were done on Win 10.
What I tried and didn't work:
- Fastboot --set-active=a
Code:
C:\ADB>Fastboot --set-active=a
Setting current slot to 'a'...
FAILED (remote: Slot Change is not allowed in Lock State)
finished. total time: 0.003s
- Unlocking with unlock.bin. Didn't save the msg but saw it somewhere in another thread. I needed to install/point drivers first because the device was not recognized in Win.
- Solutions for G6 for going into download mode. The download mode icon was displayed for a second and then going to fastboot again.
- LG Flash Tool 2014 - I just followed a guide for older phones but it didn't work. Didn't try again.
What did work:
1. I found this post on reddit (remove spaces or PM me, I'm not allowed to post links):
Code:
https:// www .reddit. com/r/LGG3/comments/2qe5sr/in_need_of_serious_help_stuck_in_fastbootno/cn5f2qr/?utm_source=share&utm_medium=web2x
Quoting the post
2. I used LG_Firmware_Extract_v1.2.6.1 and extracted dz file from aforementioned pie file. The I extracted two laf files for the kz file. In my case they were: laf.img_180534 and laf.img_81990.
3. I took one of these files (sry, don't remember which one, but they have the same size - didn't check if they're the same) renamed it to laf.img and put a folder where fastboot.exe is.
4. I did
Code:
fastboot boot laf.img
and voila: the phone was in download mode!
5. After that LGUP the previous rom and the phone is working again. Here I needed few tries. At first the were some problems, then I tried different combinations (1.14, 1.15, w/ and w/o uppercut). I think LGUP 1.15 (1.14 with patch) did the work. I was able to "refurbish" the phone.
Hope it's useful for others. If anyone could prepare a guide from this description or/and tell why it worked - please feel free to do so.
I think I will wait some time before trying pie again
Click to expand...
Click to collapse
Thanks for you guide.. I follow it but unfortunatly after "fastboot boot laf.img" I get this message from my LG:
"Your device has failed a routine safety check.... it will reboot after a while.."

davinik84 said:
Thanks for you guide.. I follow it but unfortunatly after "fastboot boot laf.img" I get this message from my LG:
"Your device has failed a routine safety check.... it will reboot after a while.."
Click to expand...
Click to collapse
I recall I also had some error msg, it could've been the same. Now I don't remember what I exactly did next as most my actions were more or less random. Either I tried the same command but with other laf.img file (from the rom I used before), or I tried to restart the phone into download mode (vol- and power together and then vol+ after screen goes black) or tried the same file again.
Hope it helps.

davinik84 said:
Thanks for you guide.. I follow it but unfortunatly after "fastboot boot laf.img" I get this message from my LG:
"Your device has failed a routine safety check.... it will reboot after a while.."
Click to expand...
Click to collapse
I have the same problem as well. I follow the guide but I received the same error message

domenico.dalpiaz said:
I have the same problem as well. I follow the guide but I received the same error message
Click to expand...
Click to collapse
Check if the phone is recognized in LG Bridge. If so, then choose update error recovery from software update tab. Again, I don't remember if it worked immediately or did I need to reinstall drivers and/or choose a proper driver in device manager (generic ADB vs LG...) and/or restart the phone.

domenico.dalpiaz said:
I have the same problem as well. I follow the guide but I received the same error message
Click to expand...
Click to collapse
I have same error too ...

DenisVelev said:
I have same error too ...
Click to expand...
Click to collapse
Based on other threads, e.g. https://forum.xda-developers.com/v20/how-to/restore-v20-to-100-stock-bricked-devices-t3524903 and https://www.reddit.com/r/lgg6/comments/axd17d/lg_g6_eu_glh870_bricked_after_update_your_device/
try:
install the LG Bridge updater software on a computer, go to updates, click the "correct update errors" button. Then plug in your turned-off phone while holding down the volume up button. It should switch to download mode and reinstall all software from the PC. Yes, this will erase all data but it should unbrick your phone (unless the hardware's broken I guess)
Click to expand...
Click to collapse

Garlikus said:
Based on other threads, e.g. https://forum.xda-developers.com/v20/how-to/restore-v20-to-100-stock-bricked-devices-t3524903 and https://www.reddit.com/r/lgg6/comments/axd17d/lg_g6_eu_glh870_bricked_after_update_your_device/
try:
Click to expand...
Click to collapse
Cannot put in download mode. Only Fastboot. For a secound show download mode after that show fastboot mode.

Unbrick realme x

Hi it's me again
i've bicked my phone last week, it only shows the image of realme and then a text that says the boot/recovery image have been destroyed, the problem with this brick its THE BOOTLOADER ITS BLOCKED AND THE PHONE CANT START THE RECOVERY, so the options are pretty limited, plus my device is china version.
The things and tools that i've been trying are:
*ADB FASTBOOT (i know i already said that the bootloader it's blocked but i had to try)
*Qualcomm snapdragon flash tool QIFL
*Qualcomm premium tool
*XTM Inferno tool
*OPPO download tool
*MSMDownload tool
Yeah, i've tried a few things already (not too much to be honest), but with everyone theres a problem.
Adb dont recognice because its not in fastboot, QIFL needs a xml file but the roms don't have it, and i dont know how to program it, XTM inferno tool dont recognice the device, and oppo and msm download tool needs an account, if anyone knows what can i do now, please let me know, i'm a little bit sad cause i haven't made it to unbrick

So sad that you can't enter fastboot. It seems that means you can't send commands to your phone.
Recently, I saved my "soft brick" China version RMX. I also get "boot/recovery image have been destroyed" notification, but I can enter fastboot mode (power+Volume-), and my fastboot is unlocked. I used "fastboot flash recovery" cammand to flash TWRP and another command for vbmeta (https://forum.xda-developers.com/re...very-unofficial-twrp-realme-x-stable-t3959556). However, the response in "Windows Command Prompt" is "Failed unknown error".
So I decided to power off and charge my phone. After power off, there is thunder icon, a symbol for charging in powe off state, on the screen. Sunddenly, the phone boot into TWRP automaticly. I connected it to my laptop at once and find TWRP MTP service works which means I can copy the 2.6 GB stock Color OS zip (RMX1901CN_flashable_A17.zip, https://forum.xda-developers.com/realme-x/how-to/guide-to-stock-rom-stock-recovery-t3974607
, https://sourceforge.net/projects/rmx1901/files/custom_recovery_StockROM_flashable_files/) to internal storage (/sdcard), and I installed it successfully, though there was "Unmount to mount storage" error when I wiped Data in TWRP.
Reboot to system succesfully and showed Color OS setting guide, which showed at the first time you turn on the phone. Recovery changed to oppo stock Recovery, but the unlocked fastboot mode didn't change.
I am not sure wether the link is useful for cracked MSMDownload tool :https://www.techoxygen.com/msm-download-tool/

00002972 said:
So sad that you can't enter fastboot. It seems that means you can't send commands to your phone.
Recently, I saved my "soft brick" China version RMX. I also get "boot/recovery image have been destroyed" notification, but I can enter fastboot mode (power+Volume-), and my fastboot is unlocked. I used "fastboot flash recovery" cammand to flash TWRP and another command for vbmeta (https://forum.xda-developers.com/re...very-unofficial-twrp-realme-x-stable-t3959556). However, the response in "Windows Command Prompt" is "Failed unknown error".
So I decided to power off and charge my phone. After power off, there is thunder icon, a symbol for charging in powe off state, on the screen. Sunddenly, the phone boot into TWRP automaticly. I connected it to my laptop at once and find TWRP MTP service works which means I can copy the 2.6 GB stock Color OS zip (RMX1901CN_flashable_A17.zip, https://forum.xda-developers.com/realme-x/how-to/guide-to-stock-rom-stock-recovery-t3974607
, https://sourceforge.net/projects/rmx1901/files/custom_recovery_StockROM_flashable_files/) to internal storage (/sdcard), and I installed it successfully, though there was "Unmount to mount storage" error when I wiped Data in TWRP.
Reboot to system succesfully and showed Color OS setting guide, which showed at the first time you turn on the phone. Recovery changed to oppo stock Recovery, but the unlocked fastboot mode didn't change.
I am not sure wether the link is useful for cracked MSMDownload tool :https://www.techoxygen.com/msm-download-tool/
Click to expand...
Click to collapse
Thank you very much, i will keep looking, and will see the tool u shared, any step forward i make i will post it, and thanks again

Flash official ofp format stock ROM in EDL mode might be helpful. The links offer ofp ROM, guide & password for download tool. An XDA post also mentioned this link. But I'm still confused about the difference between RMX1901 and RMX1901EX model. Some custom ROM is universal for India and China variant on XDA .
https://boycracked.com/2019/05/06/official-realme-x-rmx1901-stock-rom/
https://forum.xda-developers.com/realme-x/how-to/color-os-stock-rom-redmi-x-rmx1901-t3952399/page2

00002972 said:
Flash official ofp format stock ROM in EDL mode might be helpful. The links offer ofp ROM, guide & password for download tool. An XDA post also mentioned this link. But I'm still confused about the difference between RMX1901 and RMX1901EX model. Some custom ROM is universal for India and China variant on XDA .
https://boycracked.com/2019/05/06/official-realme-x-rmx1901-stock-rom/
https://forum.xda-developers.com/realme-x/how-to/color-os-stock-rom-redmi-x-rmx1901-t3952399/page2
Click to expand...
Click to collapse
i can´t see the username and password, its what i need to open the msm download tool, i already have downloaded the files

hello bro.
i was having custom recovery and i tried to relock bootloader and now my device is bricked.
i am not able to go in fastboot mode.
please help

imteyajch said:
hello bro.
i was having custom recovery and i tried to relock bootloader and now my device is bricked.
i am not able to go in fastboot mode.
please help
Click to expand...
Click to collapse
Y
Hi dude, at this time I have not found a way to do it without realme tech support, or remote flash tool.
This device needs a “permission” of realme servers to get flashed. If your device is India version you can ask to boy cracker staff, if your device is China version maybe combine file staff can help.
If you have the option of send it to realme tech support, you should take it

Irvinukis said:
Y
Hi dude, at this time I have not found a way to do it without realme tech support, or remote flash tool.
This device needs a “permission” of realme servers to get flashed. If your device is India version you can ask to boy cracker staff, if your device is China version maybe combine file staff can help.
If you have the option of send it to realme tech support, you should take it
Click to expand...
Click to collapse
Its indian version. please help i did many things. i cannot go to booloader and fastboot mode

Bro yesterday I got an update from reami I updated to android 11 my bootloader was not unlocked and update was failed no recovery stuck on logo i Tryed to flash with msm but still no responce its indian version 1901 any solution please ?

But I can't tried ufs

Flashing using MI Flash got stuck

Hello,
I'm using Redmi Note 5 pro. Recently my device went on boot loop. Whenever I tried to restart, it was showing MI Logo for long time, nothing happens. I'm not able to enter into recovery mode as well (Vol Up + Power). But I can go to Fastboot mode (Vol down + power key).
Mine is not bootloader unlocked and I dont think I have enabled OEM Unlocking from the settings.
I tried downloading the ROM from below URL (Rom for Fastboot flash) -> whyred_global_images_V11.0.3.0.PEIMIXM_20191108.0000.00_9.0_global
http://c.mi.com/in/miuidownload/detail?guide=2
http://update.miui.com/updates/v1/fullromdownload.php?d=whyred_global&b=F&r=global&n=
When I check, whether the fastboot devices is showing mine or not, I can see my device listed
In another forum, I can across this, before flashing using MiFlash, they asked to download the Edl.cmd file from the below link and run it. I did that as well.
https://forum.xda-developers.com/an.../guide-how-to-reboot-to-edl-fastboot-t3394292
After that, when I select the downloaded ROM, and try to flash it with MiFlash (v2019.12.6.0), it keep showing the below line. but its not getting errored out. progress bar keeps going till the end but it stays with the below status. Attached the screenshot as well.
fastboot %* getvar product 2>&1 | findstr /r /c:"^product: *whyred" || echo Missmatching image and device
Any help with will be much helpful! Thanks in advance!

I think flashing via fastboot on unlocked bootloader is not possible

Hi, you mean locked bootloader is not possible?
If yes, is there a way to fix the phone?
Thanks in advance!

karthik623521 said:
Hi, you mean locked bootloader is not possible?
If yes, is there a way to fix the phone?
Thanks in advance!
Click to expand...
Click to collapse
The way i see is Edl flash mode (wait for a proper answer)

I accidentally locked my chinese whyred while flashing global rom using miflash.
The only thing that worked for me was EDL flash chinese rom using QFIL following the tutorial here: https://forum.xda-developers.com/redmi-note-5-pro/how-to/fix-arb-bricked-device-qfil-t3841780
I had to use chinese rom for 360 hours until I could unlock the bootloader again.
You need to flash the rom version that matches your device origin (global, china, india, russia, etc..)

tsarig said:
I accidentally locked my chinese whyred while flashing global rom using miflash.
The only thing that worked for me was EDL flash chinese rom using QFIL following the tutorial here: https://forum.xda-developers.com/redmi-note-5-pro/how-to/fix-arb-bricked-device-qfil-t3841780
I had to use chinese rom for 360 hours until I could unlock the bootloader again.
You need to flash the rom version that matches your device origin (global, china, india, russia, etc..)
Click to expand...
Click to collapse
Hello, Thanks for letting me know about this method. I tried this but I'm not able to find my devices showing in Device Manager as "qualcomm hs-usb qdloader 9008" (I'm trying with fastboot mode as am not able to go to Recovery mode)
I tried installing the Qualcomm QDLoader 9008 driver using the method shown in the below link
https://www.99mediasector.com/install-qualcomm-hs-usb-qdloader-9008-install/
1. tried direct installation of exe - didn't work)
2. there was manual method which asked me to reboot in edl mode using the command fastboot oem edl - but this shows error saying FAILED (remote: 'Device is already locked!')
//attached screenshot for reference
Thanks!

karthik623521 said:
Hello, Thanks for letting me know about this method. I tried this but I'm not able to find my devices showing in Device Manager as "qualcomm hs-usb qdloader 9008" (I'm trying with fastboot mode as am not able to go to Recovery mode)
I tried installing the Qualcomm QDLoader 9008 driver using the method shown in the below link
https://www.99mediasector.com/install-qualcomm-hs-usb-qdloader-9008-install/
1. tried direct installation of exe - didn't work)
2. there was manual method which asked me to reboot in edl mode using the command fastboot oem edl - but this shows error saying FAILED (remote: 'Device is already locked!')
//attached screenshot for reference
Thanks!
Click to expand...
Click to collapse
You're in fastboot. not EDL mode.
EDL Testpoint - https://youtu.be/dYVR5BgNwG0
Connect the usb cable to both phone and pc, disconnect the battery flex cable, short the two EDL testpoint, and connect the battery flex cable. it will take some practice.
Also, there is a limited time in EDL mode to start flashing, if you too late you will have to repeat again.
Use this tutorial https://youtu.be/ikGsxf_s-zw

It seems shorting pins and edl flashing is the only way for reviving ur phone pal
Good luck

LG G8 G820UM stuck unlocking bootloader plz help?

Hi and thanks for reading--
I followed this guide for my new LG820UMBK Verizon Unlocked:
Guide LG G8/G8x/v50 Bootloader Unlock and Magisk Root using Firehose
Disclaimer: I am not responsible for any problems from using this guide. Works for G8, G8s, G8x, and v50 Confirmed working on G8 and v50 Requirements: Android 10 QFIL...
forum.xda-developers.com
I flashed the engineer abl_a and abl_b and my first hangup was to enter Fastboot mode I hold Vol+ instead of Vol- as the guide says. But it tooks several reboots and flashing back to the backup abl to figure that out. My device in Fastboot mode isnt recognized by my PC with the fastboot devices command. It is recognized by Device Manager however as Other devices: Android.
Upon boot it gets stuck at VZW splash screen. I can enter EDL mode but when I try to restore my backup abl_a+b it says Data Overflow do you wish to continue. If I select yes it wont flash the backup abl with the size of 32,768 kb. It leaves the abl files at 1,024 kb which was the size of the engineer file.
I can boot to Fastboot but my fastboot devices commands can't see the device. In Device Manager like I said in Fastboot mode it just shows up as Other Devices: Android. On the Verizon spash screen it appears in Device Manager as LGE AndroidNet USB Serial Port (COM3) and in EDL mode it shows up under Ports as: Qualcomm HS-USB QDLoader 9008 (COM11).
I ran the LG Mobile Support Tool and it installed all the proper drivers it says. Maybe I dont have the adb/fastboot drivers? I tried to find them in the SDK but its way more complicated than it used to be. I havent rooted since the LG G2 lol.
Any ideas or help would be so awesome. Its basically bricked cause I cant flash the ABL backups. LGUP program doesn't recognize the device, I did download the correct G820UM20i_00_VZW_US_OP_1124.kdz file so maybe i'll just attempt to restore the stock rom. Can I do that with QFIL??
I cant believe I'm the only person this happened to....
Thanks for any thoughts!!

durrant111 said:
Hi and thanks for reading--
I followed this guide for my new LG820UMBK Verizon Unlocked:
Guide LG G8/G8x/v50 Bootloader Unlock and Magisk Root using Firehose
Disclaimer: I am not responsible for any problems from using this guide. Works for G8, G8s, G8x, and v50 Confirmed working on G8 and v50 Requirements: Android 10 QFIL...
forum.xda-developers.com
I flashed the engineer abl_a and abl_b and my first hangup was to enter Fastboot mode I hold Vol+ instead of Vol- as the guide says. But it tooks several reboots and flashing back to the backup abl to figure that out. My device in Fastboot mode isnt recognized by my PC with the fastboot devices command. It is recognized by Device Manager however as Other devices: Android.
Upon boot it gets stuck at VZW splash screen. I can enter EDL mode but when I try to restore my backup abl_a+b it says Data Overflow do you wish to continue. If I select yes it wont flash the backup abl with the size of 32,768 kb. It leaves the abl files at 1,024 kb which was the size of the engineer file.
I can boot to Fastboot but my fastboot devices commands can't see the device. In Device Manager like I said in Fastboot mode it just shows up as Other Devices: Android. On the Verizon spash screen it appears in Device Manager as LGE AndroidNet USB Serial Port (COM3) and in EDL mode it shows up under Ports as: Qualcomm HS-USB QDLoader 9008 (COM11).
I ran the LG Mobile Support Tool and it installed all the proper drivers it says. Maybe I dont have the adb/fastboot drivers? I tried to find them in the SDK but its way more complicated than it used to be. I havent rooted since the LG G2 lol.
Any ideas or help would be so awesome. Its basically bricked cause I cant flash the ABL backups. LGUP program doesn't recognize the device, I did download the correct G820UM20i_00_VZW_US_OP_1124.kdz file so maybe i'll just attempt to restore the stock rom. Can I do that with QFIL??
I cant believe I'm the only person this happened to....
Thanks for any thoughts!!
Click to expand...
Click to collapse
So I forgot to eject my micro SD card, I know so dumb. I am now able to fastboot. I tried to flash the original abl_a and b with fastboot and it is telling me Error Flashng Partition: Volume Full. Same issue I was having in QFIL basically. How do I restore the abl files ughhhhh.

you can fomat data : - and power before click power

durrant111 said:
So I forgot to eject my micro SD card, I know so dumb. I am now able to fastboot. I tried to flash the original abl_a and b with fastboot and it is telling me Error Flashng Partition: Volume Full. Same issue I was having in QFIL basically. How do I restore the abl files ughhhhh.
Click to expand...
Click to collapse
Boot to EDL mode by holding the vol - and power button while your G8 is plugged in your computer, after you hear a disconnection sound immediately press the vol + until you hear a connection sound from your computer.
Now, open QFIL then look for the abl a and b then flash your backed up abl_a nd abl_b accordingly and reboot. And you're good to go again.

I can help you. Do you fix problem ???

I am having some issues with rooting my g8 at&t I managed to successfully unlock the bootloader but now I am stuck in a bootloop after trying to flash magisk. I can start in edl mode or download mode and that is all. My phone flashes the lg splash screen for a split second over and over it doesn't matter if I flash my backup adl files or boot files it just keeps doing the same thing. What am I missingm

Anybody?

Ratty696 said:
Anybody?
Click to expand...
Click to collapse
.

Ratty696 said:
I am having some issues with rooting my g8 at&t I managed to successfully unlock the bootloader but now I am stuck in a bootloop after trying to flash magisk. I can start in edl mode or download mode and that is all. My phone flashes the lg splash screen for a split second over and over it doesn't matter if I flash my backup adl files or boot files it just keeps doing the same thing. What am I missingm
Click to expand...
Click to collapse
Gonna need more details. What steps did you take to try to flash magisk that resulted in the bootloop?

armodons said:
Gonna need more details. What steps did you take to try to flash magisk that resulted in the bootloop?
Click to expand...
Click to collapse
Used method in beginning of this thread. Tried flashing backup
armodons said:
Gonna need more details. What steps did you take to try to flash magisk that resulted in the bootloop?
Click to expand...
Click to collapse
I used the method in that thread to unlock and try to root. When I flashed majisk is when my problem started. I have tried flashing the backup files I made but that doesn't help either

Ratty696 said:
Used method in beginning of this thread. Tried flashing backup
I used the method in that thread to unlock and try to root. When I flashed majisk is when my problem started. I have tried flashing the backup files I made but that doesn't help either
Click to expand...
Click to collapse
So you are saying you bootloop after you use QFIL to flash Magisk-patched boot_a and boot_b? Do "backup files" mean the original boot_a and boot_b that you flash back using QFIL?
If so, you should double check you are flashing the correct partitions in QFIL because neither of these steps seem like they can result in bootloop. LGUP and start over.

armodons said:
So you are saying you bootloop after you use QFIL to flash Magisk-patched boot_a and boot_b? Do "backup files" mean the original boot_a and boot_b that you flash back using QFIL?
If so, you should double check you are flashing the correct partitions in QFIL because neither of these steps seem like they can result in bootloop. LGUP and start over.
Click to expand...
Click to collapse
Yes when I used QFIL to flash magus isvwgen it started abd flashung original boot_a and boot_b dont fix it. I can't get kdz file for at&t to lg up.

Ratty696 said:
Yes when I used QFIL to flash magus isvwgen it started abd flashung original boot_a and boot_b dont fix it. I can't get kdz file for at&t to lg up.
Click to expand...
Click to collapse
Is there any place to get the KDZ file for the AT&T g8? I got someone claiming to have it but want me to prepay $30 for it

Nobody able to help me?

Ratty696 said:
Nobody able to help me?
Click to expand...
Click to collapse
I'm new to the G8 (not LG), so just now browsing these posts.
First and foremost, this thread shouldn't be in this forum. This forum is for roms, kernels, recoveries and other development.
This thread is a question about a guide (which is in guides forum). This 'question' is not development of a rom, kernel or recovery, it's a question.
I'd suggest, if you want people to respond that can help, ask the question in it's individual guide thread, that's where the people that know the most about it will be. If you get no response in that thread, then maybe think about posting the question in the questions forum.
but here? in dev forum? absolutely the wrong place for a question about a guide.
cheers

Thread moved to Q&A section.
Thanks!
woodman
Senior Moderator

@durrant111
So to the original OP; 2 things; If your device isn't recognized when in fastboot mode, that's because you don't have the right driver installed in WinBlows.
You have to download the LG USB drivers, install them, then in device manager select the "! Android" and install the driver (usually says ADB) and then 'fastboot devices' will see the phone.
Second; if you ever get a message telling you that 'Data Overflow' then you are absolutely making a big mistake. When you did the backup of your abl(s) (and other partitions), you should have renamed then one by one, that way you don't make the mistake of naming the laf_a partition as the abl_a partition (or any name other than what ti should be). If you flash the wrong partition you run the risk of overwriting the nearby partition, which would make the device essentially unusable except only to qfil.
Lastly, yer lucky the device is VZW, as they make their kdz available and you can use use lg up to get back to stock. If it was Sprint or At&t you'd be scrambling to find a qfil or bkerler backup someone luckily made that you come across (a much more unlikely scenario).
Good luck, you've probably already moved on from this, but just in case, thought I'd mention the above.
cheers

Ratty696 said:
Is there any place to get the KDZ file for the AT&T g8? I got someone claiming to have it but want me to prepay $30 for it
Click to expand...
Click to collapse
Unfortunately at&t doesn't make their kdz available. You can be 99.9% positive the only thing this person that wants to charge you 30$ is going to give you is the partitions backed up by qfil or bkerler edl stuff.
With both at&t and sprint, because no kdz, you can only restore (if you didn't back up the files yourself originally), with someone elses backup, and then you have to use qfil or bkerler edl utilities to restore. If you look around in the G8 forums (or the tele group), there's a decent chance someone has already make their backup available.
cheers and good luck.

Ratty696 said:
Nobody able to help me?
Click to expand...
Click to collapse
Could you solve your problem?
I also have an at&t lg g8 and I want to unlock the bootloader

Yarib said:
Could you solve your problem?
I also have an at&t lg g8 and I want to unlock the bootloader
Click to expand...
Click to collapse
Lol no still haven't solved my problem. I need the abl_a and abl_b files for a lg g8 at&t. My phone only goes in fastboot or qfil and Fastboot says its a lmg850um because I tried using the files from my lg g8x and it didn't work. I have also now bricked my lg g8x it only boots into qfil. Any help would be great. My g8x is canada version