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[Q] Fastboot flash error - FAILED (remote: unknown command)

Hi,
I have following problem, phone is D405N:
If I boot into fastboot and try to flash some file - TWRP recovery for example I always get following error:
c:\adb>fastboot flash recovery L90.img
target reported max download size of 536870912 bytes
sending 'recovery' (13818 KB)...
OKAY [ 0.546s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.546s
Any idea where is a problem and how to fix this it? Using latest adb and drivers also.

same here

Did you tried with driver from @LaDY Vengeance post?
http://forum.xda-developers.com/lg-l90/general/guide-fastboot-l90-d415-t2827825

neverdies said:
Did you tried with driver from @LaDY Vengeance post?
http://forum.xda-developers.com/lg-l90/general/guide-fastboot-l90-d415-t2827825
Click to expand...
Click to collapse
I tried those drivers, and I have no luck. I have the same problem, except that I can't use any command, they all return FAILED (remote: unknown command)
I'm stuck in fastboot, and with this issue I can't flash the backup img's to restore it.
SOMEONE PLS HELP

jmang98 said:
I tried those drivers, and I have no luck. I have the same problem, except that I can't use any command, they all return FAILED (remote: unknown command)
I'm stuck in fastboot, and with this issue I can't flash the backup img's to restore it.
SOMEONE PLS HELP
Click to expand...
Click to collapse
what steps have you done so far?
ie: unlock/root/flash recovery?

itsJohnuno said:
what steps have you done so far?
ie: unlock/root/flash recovery?
Click to expand...
Click to collapse
Same problem....

Did anyone who was having this problem end up finding a fix?

This is a problem I have too, need a fix.

Still need a solution. Is this due to lollipop? Cuz back then I was able to unlock the bootloader. LG L90 D415

BlaMa said:
Hi,
I have following problem, phone is D405N:
If I boot into fastboot and try to flash some file - TWRP recovery for example I always get following error:
c:\adb>fastboot flash recovery L90.img
target reported max download size of 536870912 bytes
sending 'recovery' (13818 KB)...
OKAY [ 0.546s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.546s
Any idea where is a problem and how to fix this it? Using latest adb and drivers also.
Click to expand...
Click to collapse
D405_v20a_patched_aboot??
http://forum.xda-developers.com/lg-l90/development/recovery-twrp2-7-1-0lgl90w7xxshoxx-t2826150
EDIT:
Did you flash D405_v20a_patched_aboot if not, you need to flash D405_v20a_patched_aboot

i also have same poblem d415

me too...same problem D415 tmobile version

Does anyone with this problem have an lg d-415 and android with root? Because I think these commands in a terminal emulator or in an adb shell will fix fastboot:
Code:
su
dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/laf
Or if that doesn't work try this >> https://forum.xda-developers.com/lg...ick-hard-bricked-l90-variants-t3173429/page24
I think this problem is caused by people not unlocking the bootloader.

Same error on LG D415
BlaMa said:
Hi,
I have following problem, phone is D405N:
If I boot into fastboot and try to flash some file - TWRP recovery for example I always get following error:
c:\adb>fastboot flash recovery L90.img
target reported max download size of 536870912 bytes
sending 'recovery' (13818 KB)...
OKAY [ 0.546s]
writing 'recovery'...
FAILED (remote: unknown command)
finished. total time: 0.546s
Any idea where is a problem and how to fix this it? Using latest adb and drivers also.
Click to expand...
Click to collapse
PLEASE HELP. I'm getting the same error on my LG D415. They said on the other thread that this variant comes with the bootloader already unlocked but whenever i try to enter a command (e.g fastboot flash laf laf.img) or pretty much every command I enter (except fastboot getvar all and fastboot devices), I get the same message FAILED (remote: unknown command). My android is now stuck on the T-mobile logo whenever I try to power it up and I can't flash because download mode has been replaced with fastboot.

aixhinnn said:
PLEASE HELP. I'm getting the same error on my LG D415. They said on the other thread that this variant comes with the bootloader already unlocked but whenever i try to enter a command (e.g fastboot flash laf laf.img) or pretty much every command I enter (except fastboot getvar all and fastboot devices), I get the same message FAILED (remote: unknown command). My android is now stuck on the T-mobile logo whenever I try to power it up and I can't flash because download mode has been replaced with fastboot.
Click to expand...
Click to collapse
How did you enable fastboot, what commands did you run?

0000.0000.00 said:
How did you enable fastboot, what commands did you run?
Click to expand...
Click to collapse
i followed this guide
https://forum.xda-developers.com/lg-l90/general/guide-unlock-bootloader-t-mobile-l90-t2836457
but once I was already in fastboot no other commands work.

aixhinnn said:
i followed this guide
https://forum.xda-developers.com/lg-l90/general/guide-unlock-bootloader-t-mobile-l90-t2836457
but once I was already in fastboot no other commands work.
Click to expand...
Click to collapse
Did you try volume down+ power to factory reset and see if that fixes it?

im having this problem too, but on an lg v10 tmobile

17mm said:
im having this problem too, but on an lg v10 tmobile
Click to expand...
Click to collapse
This problem is strange and I'm not sure if it has a solution.

0000.0000.00 said:
This problem is strange and I'm not sure if it has a solution.
Click to expand...
Click to collapse
what i did was get lg bridge and mobile support, let if flash the most current update then used this method to root on the latest 30c update https://forum.xda-developers.com/tm...901-nougat-t3773942/post76711778#post76711778
twrp flashed fine, magisk installed flawlessly, now rooted on latest official update with all kinds of goodies to play with :good:
oh and with magisk you pass safetynet aswell so all good.

Flashing oeminfo on Huawei P9

Hi,
I am trying to follow the instruction on http://forum.xda-developers.com/p9/development/c432-oeminfo-flash-twrp-t3384903 to debrand Vodafone UK P9 and then apply correct oeminfo to restore Android Pay functionality. I unlocked the bootloader and installed TWRP using SRK Tool.
Now when trying to flash oeminfo as sugested I am getting:
Code:
fastboot flash oeminfo oeminfo.img
target reported max download size of 471859200 bytes
sending 'oeminfo' (65536 KB)...
OKAY [ 1.451s]
writing 'oeminfo'...
FAILED (remote: Command not allowed)
finished. total time: 1.462s
Enable OEM Unlock is on in Developer options.
Stuck with this one. What am I doing wrong? Do I need to root the device?

Problem oeminfo
Hello, i have the same problem.
The phone is unlockeed but not root and not have twrp.
Hoow can i resolve this ?
Thank you.
Alessandro.
delta-bravo said:
Hi,
I am trying to follow the instruction on http://forum.xda-developers.com/p9/development/c432-oeminfo-flash-twrp-t3384903 to debrand Vodafone UK P9 and then apply correct oeminfo to restore Android Pay functionality. I unlocked the bootloader and installed TWRP using SRK Tool.
Now when trying to flash oeminfo as sugested I am getting:
Code:
fastboot flash oeminfo oeminfo.img
target reported max download size of 471859200 bytes
sending 'oeminfo' (65536 KB)...
OKAY [ 1.451s]
writing 'oeminfo'...
FAILED (remote: Command not allowed)
finished. total time: 1.462s
Enable OEM Unlock is on in Developer options.
Stuck with this one. What am I doing wrong? Do I need to root the device?
Click to expand...
Click to collapse

you need to root your device.

hi my devices is bricked and need to convert it to global version
pe-TL10v100c00
so i wana change it from chaina version to global but it's bricked and just fastboot mode work
i have oem ino.img and sys.img and cust.img and recovery.img
but oeminfo.img show error which friend up show that!
how must i do it?

Bricked P9

Hi there! So, I unlocked my bootloader yesterday and I've been trying to install a custom rom, no luck at all, it doesn't boot. It just stays in a bootloop. I think that's because I wiped the system and data instead of just wiping data then performing a factory reset, how it told me in the installation guide. Now, I have a european EVA-L09 with a unlocked bootloader and TWRP installed. What can i do to get it boot up? Thanks in advance

Try with HWOTA by installing the same stock ROM you had before messing up
https://forum.xda-developers.com/showpost.php?p=75787156&postcount=3
Btw, Huawei portal for Bootloader codes was down for days - was it up now again or you paid for DC Unlocker

If u can boot device to fastboot, you can flash boot.img, recovery.img system.img and cust.img trough command prompt to boot up phone. Previously extract those 4 files from update.app with Huawei Update Extractor.

zgfg said:
Try with HWOTA by installing the same stock ROM you had before messing up
https://forum.xda-developers.com/showpost.php?p=75787156&postcount=3
Btw, Huawei portal for Bootloader codes was down for days - was it up now again or you paid for DC Unlocker
Click to expand...
Click to collapse
I paid for DC Unlocker. I'll try it out. Ummm, I bought mine from UK, what version should I get? I had the latest EMUI 5.0.1 (Naugat 7.0) Stock ROM. It was my mistake that I didn't backed it up, had no storage left on my SD Card... Stupid me

fler_tb said:
If u can boot device to fastboot, you can flash boot.img, recovery.img system.img and cust.img trough command prompt to boot up phone. Previously extract those 4 files from update.app with Huawei Update Extractor.
Click to expand...
Click to collapse
Hi there! I'll try it out!

fler_tb said:
If u can boot device to fastboot, you can flash boot.img, recovery.img system.img and cust.img trough command prompt to boot up phone. Previously extract those 4 files from update.app with Huawei Update Extractor.
Click to expand...
Click to collapse
Code:
C:\Users\Whiskey\Desktop>fastboot flash system SYSTEM.img
target reported max download size of 471859200 bytes
sending sparse 'system' (449861 KB)...
FAILED (data transfer failure (Unknown error))
finished. total time: 20.379s
well, this is what happens...

BlazedMC said:
Code:
C:\Users\Whiskey\Desktop>fastboot flash system SYSTEM.img
target reported max download size of 471859200 bytes
sending sparse 'system' (449861 KB)...
FAILED (data transfer failure (Unknown error))
finished. total time: 20.379s
well, this is what happens...
Click to expand...
Click to collapse
Sorry for late answer. Maybe your bootloader is locked so you can't direct flash it trough fastboot...?!

fler_tb said:
Sorry for late answer. Maybe your bootloader is locked so you can't direct flash it trough fastboot...?!
Click to expand...
Click to collapse
I solved it a long time ago, the same day. Thanks anyway!

BlazedMC said:
I solved it a long time ago, the same day. Thanks anyway!
Click to expand...
Click to collapse
How did you??

Help!!, frp locked bootloader locked

So what happend is i wanted to get oreo on my pra la1 so i re branded it to al00c chinese version (after unlocking my bootloader)
using the al00c oem file , i flash d it in twrp and then i wanted google play services which is not there in chinese version so i unlocked bootloader again and flashed oreo twrp and then flashed pra lx1 oem info and i did not dload the lx1 software:crying: so stupid of me now i m running chinese software on lx1 and without google play now my frp and bootloader is locked. now when i try dload it goes to 5% and says system update failed . WHAT DO I DO NOW TO GET PRA LX1C432 OREO??
THANX IN ADVANCE

Try Firmware finder for huawei + erecovery method , which is :
- download firmware finder on *another android phone* and search for exact phone model (ex : PRA-LA1C185)
- choose the very first firmware down the list
- Get an update thorugh dns >> Manually >> Register update
- After that , reboot your bricked phone into erecovery by ( power + volume*+*)
- press download recovery and last firmware
- wait till getting package
- by now should firmware start downloading
- let phone complete it's work and reboot
Hope that's work for you ?

I have the bootloader unlocked via DC Unlocker. Must pay 3,99€ because it's okay.
NOW: I want flash twrp via adb-fastboot and it comes
FAILED (remote: partition length get error)

EgonsS said:
I have the bootloader unlocked via DC Unlocker. Must pay 3,99€ because it's okay.
NOW: I want flash twrp via adb-fastboot and it comes
FAILED (remote: partition length get error)
Click to expand...
Click to collapse
Have you tried this command ? fastboot flash recovery_ramdisk xxx (recovery image name)

I don't understand why there isn't any one who can develop something that can push the img files with fastboot without restriction like it's done by dc phoenix
---------- Post added at 08:16 PM ---------- Previous post was at 08:13 PM ----------
victoriordachi said:
Have you tried this command ? fastboot flash recovery_ramdisk xxx (recovery image name)
Click to expand...
Click to collapse
this is what this pra-la1 fastboot reply
C:\adb>fastboot flash recovery_ramdisk TWRPprague311.img
target reported max download size of 471859200 bytes
sending 'recovery_ramdisk' (24468 KB)...
OKAY [ 0.894s]
writing 'recovery_ramdisk'...
FAILED (remote: Command not allowed)
finished. total time: 0.905s​

RAR1991 said:
I don't understand why there isn't any one who can develop something that can push the img files with fastboot without restriction like it's done by dc phoenix
---------- Post added at 08:16 PM ---------- Previous post was at 08:13 PM ----------
this is what this pra-la1 fastboot reply
C:\adb>fastboot flash recovery_ramdisk TWRPprague311.img
target reported max download size of 471859200 bytes
sending 'recovery_ramdisk' (24468 KB)...
OKAY [ 0.894s]
writing 'recovery_ramdisk'...
FAILED (remote: Command not allowed)
finished. total time: 0.905s​
Click to expand...
Click to collapse
Try this recovery https://forum.xda-developers.com/9-lite/development/recovery-twrp-3-2-1-0-t3789306 . 0.2 test build . Install using the same command

victoriordachi said:
Try this recovery https://forum.xda-developers.com/9-lite/development/recovery-twrp-3-2-1-0-t3789306 . 0.2 test build . Install using the same command
Click to expand...
Click to collapse
thanks for the interest but like always.
C:\adb>fastboot flash recovery_ramdisk TWRPprague311.img
target reported max download size of 471859200 bytes
sending 'recovery_ramdisk' (24468 KB)...
OKAY [ 0.937s]
writing 'recovery_ramdisk'...
FAILED (remote: Command not allowed)
finished. total time: 0.953s​

victoriordachi said:
Have you tried this command ? fastboot flash recovery_ramdisk xxx (recovery image name)
Click to expand...
Click to collapse
FAILED (remote: partition error)

So I was digging on my phone and I was able to put it in recovery mode it shows USB logo with 5 % and adb devices command give that result
E:\>adb devices
List of devices attached
PSEDU17315000315 recovery​if anyone can get something from that

Hassan__12 said:
So what happend is i wanted to get oreo on my pra la1 so i re branded it to al00c chinese version (after unlocking my bootloader)
using the al00c oem file , i flash d it in twrp and then i wanted google play services which is not there in chinese version so i unlocked bootloader again and flashed oreo twrp and then flashed pra lx1 oem info and i did not dload the lx1 software:crying: so stupid of me now i m running chinese software on lx1 and without google play now my frp and bootloader is locked. now when i try dload it goes to 5% and says system update failed . WHAT DO I DO NOW TO GET PRA LX1C432 OREO??
THANX IN ADVANCE
Click to expand...
Click to collapse
Try this:
fastboot flash recovery xxx(name of recovery).IMG.
It's the old nougat command. Might work. Depends on what partition scheme your device has. Give it a shot. Likely won't but you can try.

Got same issue yesterday. After some i got a length partition issue.
I did the full OTA from eRecovery. Now i'm on PRA-LX1 8.0.0.368 C02 (NOT C432).
I should try again (i believe my device is now totally stable - i think i flashed bad rom with HuRUpdater...) and see if i can flash a TWRP (certainly 3.2.1 Oreo) with fastboot flash recovery_ramdisk twrpfile.img
Will let you know.

hello colleagues need your help huawei PRA-LA1 on the screen only huavei write how the bootloader will unlock me

Can't flash vendor.img but i have TWRP [What to do ?]

Hi guys , i was running AOSIP PIE rooted and bootloader unlocked. I did an update of Magisk. And then i couldn't flash twrp it was not working , i could still boot phone normally and phone run smooth. Someone told me to flash TWRP with flashify and i did. Here the problems started , i started having error , can't boot anywhere etc...
I followed this tutorial https://forum.xda-developers.com/hua...g-to-t3932203/ for last solution .
But unfortunatly i can't flash VENDOR.img in fastboot , i can flash all except VENDOR.img it says
C:\ADB>fastboot flash vendor VENDOR.img
target reported max download size of 471859200 bytes
sending sparse 'vendor' 1/2 (460796 KB)...
OKAY [ 10.697s]
writing 'vendor' 1/2...
FAILED (remote: Command not allowed)
finished. total time: 10.711s
I have flashed with success TWRP twrp-3.3.1-0-charlotte , i can get to it but there is no files inside the phone and it's not supporting SD cards to i don't have any ROM to flash ...
Do you guys have any idea about what to do ?
Thank you very much

I need help :'(

I had that.
Phone was completely dead, needed a new board.

chrissyyyw said:
I had that.
Phone was completely dead, needed a new board.
Click to expand...
Click to collapse
Are you sure of it ? did you buy it ?
You succefuly booted to twrp and tried to flash ROM ?
Because i used ADB command PUSH and managed to get ROM into /data/ folder in my phone , so i'm trying to flash them but it's not working at the end i reboot to fastboot
DId that happen to you too ?

benkiller47 said:
Are you sure of it ? did you buy it ?
You succefuly booted to twrp and tried to flash ROM ?
Because i used ADB command PUSH and managed to get ROM into /data/ folder in my phone , so i'm trying to flash them but it's not working at the end i reboot to fastboot
DId that happen to you too ?
Click to expand...
Click to collapse
I booted into fastboot, flashed the individual firmware files and it kept failing on the vendor.
I had a black screen with a red flashing LED on reboot. I claimed on my insurance and they replaced the board on the phone.
I checked on here and online for a resolution and it generally points to a hard brick.

benkiller47 said:
Hi guys , i was running AOSIP PIE rooted and bootloader unlocked. I did an update of Magisk. And then i couldn't flash twrp it was not working , i could still boot phone normally and phone run smooth. Someone told me to flash TWRP with flashify and i did. Here the problems started , i started having error , can't boot anywhere etc...
I followed this tutorial https://forum.xda-developers.com/hua...g-to-t3932203/ for last solution .
But unfortunatly i can't flash VENDOR.img in fastboot , i can flash all except VENDOR.img it says
C:\ADB>fastboot flash vendor VENDOR.img
target reported max download size of 471859200 bytes
sending sparse 'vendor' 1/2 (460796 KB)...
OKAY [ 10.697s]
writing 'vendor' 1/2...
FAILED (remote: Command not allowed)
finished. total time: 10.711s
I have flashed with success TWRP twrp-3.3.1-0-charlotte , i can get to it but there is no files inside the phone and it's not supporting SD cards to i don't have any ROM to flash ...
Do you guys have any idea about what to do ?
Thank you very much
Click to expand...
Click to collapse
You must use OTG! Probably Flashify borked a partition,but i don't think it borked vendor.
However, you should still be able to flash a FullOTA with TWRP + NoCheck combo.
If you can't manage that, hit me on Telegram,i'm @Pretoriano80 in there!

You can flash EMUI based FW using an OTA method. It should work. But it will lock your bootloader and you will have to unlock it again.

benkiller47 said:
Hi
Click to expand...
Click to collapse
Are you flashing the same or later firmware??