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Got rooted then wanted back to stock - End up "failed to validate system image msg

Got rooted then wanted back to stock - End up "failed to validate system image msg
owner of a Motorola XT1072 UK model from Amazon
hi guys have made an absolute mess of this
heres what i did manged to install TWRP / Superu / unlock bootloader and root the phone with no issues
decided i wanted to go back to stock so via TWRP i flashed the stock image
that left me at stock - BUT bootloader still locked
so I went in and enabled USB debugging and FORGOT to tick the allow oem lock option
did an mfastboot oem lock - and it said success
then i did fastboot reboot - this where it failed
saying "boot up failed - failed to validate system image
but it was the corrrect image as of this thread
http://forum.xda-developers.com/mot...dows-tool-moto-g-2015-xt1072-restore-t3124915
Am stuck in that screen with options Normal Powerup/ REcovery / Factory / Barcodes / BP Tools
Currently it says "failed to validate system image"
and on next line
"Fastboot Reason: Fall-through from normal boot mode"
!00% my own fault for not being careful -
are there any utilities / batch files / tips or tricks
that can get me back on the road to stock firmware again ?

dmm1000 said:
owner of a Motorola XT1072 UK model from Amazon
hi guys have made an absolute mess of this
heres what i did manged to install TWRP / Superu / unlock bootloader and root the phone with no issues
decided i wanted to go back to stock so via TWRP i flashed the stock image
that left me at stock - BUT bootloader still locked
so I went in and enabled USB debugging and FORGOT to tick the allow oem lock option
did an mfastboot oem lock - and it said success
then i did fastboot reboot - this where it failed
saying "boot up failed - failed to validate system image
but it was the corrrect image as of this thread
http://forum.xda-developers.com/mot...dows-tool-moto-g-2015-xt1072-restore-t3124915
Am stuck in that screen with options Normal Powerup/ REcovery / Factory / Barcodes / BP Tools
Currently it says "failed to validate system image"
and on next line
"Fastboot Reason: Fall-through from normal boot mode"
!00% my own fault for not being careful -
are there any utilities / batch files / tips or tricks
that can get me back on the road to stock firmware again ?
Click to expand...
Click to collapse
Just unlock it... There's no point of locking it again.

LuK1337 said:
Just unlock it... There's no point of locking it again.
Click to expand...
Click to collapse
Hi Luk
the problem is that i DID NOT set the option for "Allow OEM UnLock"
and it will not unlock for me
its says (bootloader) - Check Allow OEM Unlock
it says FAILED (Remote failure)
Please help

LG G4 T-Mobile version 20x kdz

https://www.androidfilehost.com/?fid=818222786056028333
To regain root, simply use
Code:
fastboot boot
and drag and drop the TWRP file and press enter, and install root of your choice.

Boot loader won't unlock LG G4 H811
Boot loader won't unlock LG G4 H811
I have a LG G4 H811 (firmware version H81120o)
I want to unblock the bootloader but all attempts did not help
when you try to unlock through the ADB, after the second command line
the following text appears on the phone:
--------------------------------------------------------------
* Welcome to Fastboot Mob for bootloader unlock:
* Quik Guidance
1) How to ulock: fastboot oem unlock
2) Check bootloader is unlocked: fastboot getvar unlocked
* HOW TO exitfastboot mode
1) Press the Power button for 10 secs to turn off the device
2) Use "fastboot reboot" command if the fastboot is available
----------------------------------------------------------------
After the appearance of such text, the phone freezes and does not respond to any commands
I've tried all the ways that you can find on "YouTube" but they do not help
help me please
sorry for the incorrect text, I use Google translator
thanks to everyone

Can this just be flashed in twrp along with the gapps zip?

Guess not

vov4ik59 said:
Boot loader won't unlock LG G4 H811
I have a LG G4 H811 (firmware version H81120o)
I want to unblock the bootloader but all attempts did not help
when you try to unlock through the ADB, after the second command line
the following text appears on the phone:
--------------------------------------------------------------
* Welcome to Fastboot Mob for bootloader unlock:
* Quik Guidance
1) How to ulock: fastboot oem unlock
2) Check bootloader is unlocked: fastboot getvar unlocked
* HOW TO exitfastboot mode
1) Press the Power button for 10 secs to turn off the device
2) Use "fastboot reboot" command if the fastboot is available
----------------------------------------------------------------
After the appearance of such text, the phone freezes and does not respond to any commands
I've tried all the ways that you can find on "YouTube" but they do not help
help me please
sorry for the incorrect text, I use Google translator
thanks to everyone
Click to expand...
Click to collapse
This is 2 months late, but if you're still looking for a possible solution, this is what I did:
1.) Download the tools you need here: https://developer.android.com/studio/releases/platform-tools/ and extract
2.) Install LG United Mobile Drivers from here: https://lg-united-mobile-driver.en.lo4d.com/. I recommend uninstalling previously installed LG G4 drivers from Device Manager and then reinstall from that page. You may need to install additional drivers once you connect your G4 to your computer.
3.) In Developer Options, make sure you have "Enable OEM unlock" checked and "USB Debugging"
4.) Open a command prompt in the tools directory (hold shift, right-click inside the folder, and click "open command prompt here." If you've authorized your device to be recognized by your computer (two prompts should popup: one to allow USB connection and another to allow USB debugging), your device should be listed if you enter the command "adb devices"
5. Enter "adb reboot bootloader"
6. Once the phone has rebooted into the bootloader, you should be at the stage where you get the text on your phone, as you described. Enter "fastboot oem unlock"
7. Check if you've unlocked the bootloader: "fastboot getvar unlocked"
8. If successful, you can then go on to flash TWRP onto the recovery partition and root your phone by flashing Magisk from there.

Hello .. I have a LG G4 811 t mobile32GB phone, what is the appropriate flash?

V40 on startup: "Your device has failed a routine safety check and will not boot."

V40 on startup: "Your device has failed a routine safety check and will not boot."
I was following this guide to try to flash a US firmware on my bootloader-unlocked Sprint V40: https://forum.xda-developers.com/lg-v40/how-to/guide-make-lg-v40-compatible-lgup-t3953120
After issuing the command "fastboot.exe set_active a" then powering off and trying to enter download mode, I get "Your device has failed a routine safety check and will not boot."
It briefly goes into download mode after that (for just a few seconds). Then I get a green screen with black text that says "LGE Crash Handler : FIQ : NOC Error!" and has a whole lot of other diagnostic info.

my one says all slots are unbootable

imekul said:
I was following this guide to try to flash a US firmware on my bootloader-unlocked Sprint V40: https://forum.xda-developers.com/lg-v40/how-to/guide-make-lg-v40-compatible-lgup-t3953120
After issuing the command "fastboot.exe set_active a" then powering off and trying to enter download mode, I get "Your device has failed a routine safety check and will not boot."
It briefly goes into download mode after that (for just a few seconds). Then I get a green screen with black text that says "LGE Crash Handler : FIQ : NOC Error!" and has a whole lot of other diagnostic info.
Click to expand...
Click to collapse
You have to restore your software again and re-root

Hold Volume+ and plug the phone to your PC to get it into download mode. Use LGUP to reflash the firmware.

Hi, I have a similar problem. after I give the command "fastboot oem unlock" to unlock, I tried to start in download mode and the same message appeared, if I restart the phone or let it restart by itself, it goes into fastboot mode, can anyone help me?
my phone is a lg g7 thinq

zMarkTM said:
Hi, I have a similar problem. after I give the command "fastboot oem unlock" to unlock, I tried to start in download mode and the same message appeared, if I restart the phone or let it restart by itself, it goes into fastboot mode, can anyone help me?
my phone is a lg g7 thinq
Click to expand...
Click to collapse
I too have this problem, i can get it into fastboot mode, and the other mode with the blank screen maybe its 9008 mode (EDL Mode) i do have an EDL cable would that help with anything?
When i press Vol + and insert cable from phone being off it doesnt go into downlaod mode only back to boot loader mode, not into download mode
Its funny its a LG G7, but its showing LM-V350EMW

update, i just manage to OEM unlock the device.
Will keep persisting

still cant get into download mode, it flashes up once i turn off phone, press vol+ and insert cable i see the image of download mode then straight into fastboot it goes

Lg v40 no fastboot mode / bootloader

I have lg v40 405ebw running on android 10 and i want to unlock bootloader problem is when ever i uses command "adb reboot bootloader" phone simply reboots and not entering in bootloader/fastboot mode.. i can get into download mode by holding volume up key. how to get into bootloader?
Any solution of this?

hassanulhaq said:
I have lg v40 405ebw running on android 10 and i want to unlock bootloader problem is when ever i uses command "adb reboot bootloader" phone simply reboots and not entering in bootloader/fastboot mode.. i can get into download mode by holding volume up key. how to get into bootloader?
Any solution of this?
Click to expand...
Click to collapse
did you do everything correctly according to this instruction https://forum.xda-developers.com/lg-v40/how-to/unlock-lg-v40-via-9008-root-t-mobile-t4042207? once again, forgive carefully and you will succeed!by the way, if you have a European version of the device, you can officially unlock the bootloader via the lg website https://developer.lge.com/resource/mobile/RetrieveBootloader.dev?categoryId=CTULRS0702

hassanulhaq said:
I have lg v40 405ebw running on android 10 and i want to unlock bootloader problem is when ever i uses command "adb reboot bootloader" phone simply reboots and not entering in bootloader/fastboot mode.. i can get into download mode by holding volume up key. how to get into bootloader?
Any solution of this?
Click to expand...
Click to collapse
as lexih is pointing out, **if** your device is an original oepn 405ebw, I'm pretty sure that is the only version that LG **officially** allows bootloader unlock for. **Assuming** that is the device you have (not flashed to, but the actual device), then contact LG.
Otherwise, follow the thread lexih provided for how to use qfil to flash the engineering abl to the abl partition, and it will allow you to unlock the device. Follow all the instructions, I'm just paraphrasing here, there are quite a few steps involved.
cheers

(french) hello i have the same probleme. i can't turn the phone in edl mode, when i reboot in fastboot it's normally reboot. when i press volume down and plug the usb type c i have "firmware update on white screen"
on the officiale lg site i don't find the phone id fastboot don't work. how we can the phone id please?

the solution write by me
edl mode 9008 v40 very easy
(french) hello I could not start in edl mode with the xda instructions but I found a videos phone on android, connected to the computer by usb. you keep pressing the power button and the volume down button. when the screen goes black...
forum.xda-developers.com

lg v40 thinq don't detected in dowload mode in windows

hello i want flash custom rom in my v40. its bootloader unlock but its android 10 not pie. i made the unlock howto with android 10....
i have fastboot command and bottloader menu but my phon dont detecter by windows in dowload mode (the little blue icon).
i want flash twrp and flash custom rom. please help