fastboot unknown command - General Questions and Answers

Hey, I have an alcatel 3 and I wanna see how I can root it. I'm trying to root it using magisk but fastboot keeps returning the error unknown command all the time.
when I do
fastboot flash ...
it sends the file but then writing produces an error.
I know that I can root it and that I've done it before using magisk. but now it doesn't work. btw i don't think i fully unrooted my device so that may be the issue.

Fastboot deals with phone's bootloader where it doesn't matter whether phone's Android got rooted or not.
If you get shown
FAILED (remote: 'unknown cmd.')
fastboot: error: Command failed
or
FAILED (remote: 'Not implemet.')
fastboot: error: Command failed
means the bootloader wasn't unlocked properly.
Try this command sequence
Code:
fastboot devices
fastboot flashing unlock
fastboot flashing unlock_critical

What if
fastboot flashing unlock.
Returns command not found

If "command not found" is returned by Fastboot when trying to unlock bootloader then unlocking phone's bootloader is denied.

what if i have to run sudo to use fastboot could that be the problem

Fastboot deals with Android device's bootloader: So it's irrelevant whether Android is rooted or not.
Take note that Fastboot isn't Fastboot hence not all Fastboot commands do necessarily work as expected: it depends on how OEM implements Fastboot.

having the same problem with my qlink tablet but when using command fastboot flashing unlock
it returned fastboot oem operation fail: unknown cmd' : error: command failed This is my first time rooting anything help please?

hellp me ty pls!

Have you turned on "allow OEM to be unlocked" in developers option

Related

Idol 3 4.7 Unlock Bootloader

I was following a guide on unlocking the idol 3. After sending it into fastboot, attempting to run "fastboot -i 0x1bbb oem unlock" returns an error saying "FAILED (remote: unknown command)"
Any idea why this might be happening or how I can fix it? I'm doing this on an iMac running the commands with ./ in the android studio "platform-tools" directory.
you'll need windows for restore adb commands
http://forum.xda-developers.com/idol-3/development/6039-guide-how-to-return-fastboot-t3201077

Cannot unlock Flashing Lock Flag for Blu Studio Mega 2019

Hello all,
I currently have a Blu Studio Mega 2019 android device with me. It is running android 9. I have spent the last 3 days trying my hardest and expending all resources to root the device. I have been unsuccessful every time and the main reason is that When I run the below command it always fails. I have tried "fastboot oem unlock" or "fastboot oem device-info" and it always returns command not valid.
fastboot flash recovery twrp.img
Sending 'recovery' (16356 KB) OKAY [ 0.527s]
Writing 'recovery' FAILED (remote: 'Flashing Lock Flag is locked. Please unlock it first!')
fastboot: error: Command failed
Yes I do have usb debugging on, OEM unlock on, I have the android drivers for the "fastboot gadget installed". My device shows up when I type "fastboot devices" and will reboot with "fastboot reboot". I have not been able to find a solution to my 'Flashing Lock Flag is locked. Please unlock it first!' problem. I hope someone else has found the solution.

FAILED (remote: 'Download is not allowed on locked devices')

i wnat to root https://www.xda-developers.com/root/
when i try
D:\platform-tools>fastboot flash boot D:\platform-tools/magisk_patched-25100_1VYTU.img
it show
Code:
Sending 'boot' (98304 KB) FAILED (remote: 'Download is not allowed on locked devices')
fastboot: error: Command failed
i also try
fastboot oem unlock
it show
Code:
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
what should i do ??
chatofking said:
i wnat to root https://www.xda-developers.com/root/
when i try
D:\platform-tools>fastboot flash boot D:\platform-tools/magisk_patched-25100_1VYTU.img
it show
Code:
Sending 'boot' (98304 KB) FAILED (remote: 'Download is not allowed on locked devices')
fastboot: error: Command failed
Click to expand...
Click to collapse
Rename the patched boot.img to "boot.img", then place the patched .img in your fastboot folder on PC then type:
fastboot flash boot boot.img
When you place the file in your fastboot folder, you don't need to include the path to the file in the command, it automatically looks for the file in the fastboot folder by default when you do not enter a path. Renaming the file to "boot.img" isn't necessarily required, but, it does simplify things for fastboot and makes the command easier to remember and type.
The same applies if you want to flash a system.img, recovery.img, etc.. Just change the name of the file to "system.img" or "recovery.img" and place it/them in your fastboot folder and it simplifies your commands to:
fastboot flash system system.img
And
fastboot flash recovery recovery.img
Also, try this for the failed command
FAILED (remote: Unable to open fastboot HAL): Unlock Bootloader Fix
In this tutorial, we will show you the steps to fix the FAILED (remote: Unable to open fastboot HAL) error when unlocking the bootloader.
www.droidwin.com
now i got same message
D:\platform-tools>fastboot flash boot boot.img
Code:
Sending 'boot' (98304 KB) FAILED (remote: 'Download is not allowed on locked devices')
fastboot: error: Command failed
Droidriven said:
Also, try this for the failed command
FAILED (remote: Unable to open fastboot HAL): Unlock Bootloader Fix
In this tutorial, we will show you the steps to fix the FAILED (remote: Unable to open fastboot HAL) error when unlocking the bootloader.
www.droidwin.com
Click to expand...
Click to collapse
im already try this verify cmd location, install fastboot driver & boot fastboot mode nothing change.
Code:
D:\platform-tools>fastboot oem unlock
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
what should i do ??
chatofking said:
i wnat to root https://www.xda-developers.com/root/
when i try
D:\platform-tools>fastboot flash boot D:\platform-tools/magisk_patched-25100_1VYTU.img
it show
Code:
Sending 'boot' (98304 KB) FAILED (remote: 'Download is not allowed on locked devices')
fastboot: error: Command failed
Click to expand...
Click to collapse
You've to unlock device's bootloader. Hence 1st of all if you want to manage the / operate on the bootloader you have to move device into fastboot mode and then run on device if it's launched 2015 or later
Code:
fastboot flashing unlock
[code]
instead of the outdated
[code]
fastboot oem-unlock
xXx yYy said:
You've to unlock device's bootloader. Hence 1st of all if you want to manage the / operate on the bootloader you have to move device into fastboot mode and then run on device if it's launched 2015 or later
Code:
fastboot flashing unlock
[code]
instead of the outdated
[code]
fastboot oem-unlock
Click to expand...
Click to collapse
when i try
D:\platform-tools>fastboot flashing unlock
it show
Code:
FAILED (remote: 'Unrecognized command flashing unlock')
fastboot: error: Command failed
i use https://developer.android.com/studio/releases/platform-tools
what should i do ??
The platform tools you actually use are meant to be used with Google devices only.
Use the Android USB-tools provided by your device's manufacturer.
xXx yYy said:
The platform tools you actually use are meant to be used with Google devices only.
Use the Android USB-tools provided by your device's manufacturer.
Click to expand...
Click to collapse
i use mtp driver
update Portable Devices to MTP USB Device
but when i enter fastboot mode
it become Android Device Android Bootloader Interface.
where is extracted the driver package folder ?? https://www.xda-developers.com/download-android-usb-drivers/
I'm having simular issue with my specter 8 tablet. I unlock the bootloader and give me the normal prompt. I go back do everything else and will execute reboot devices ect. However won't flash patch_boot.img brings up message
FAILED (remote: 'Download is not allowed on locked devices').

Question Boot-Image?

I need the boot.img for the EU-Version. Can someone please help me? Thx in forward.
Here are both magisk patched and stock boot.img files
Using latest magisk 25.1 stable
Stock
Magisk Patched
Thank you. I've now read rooting is not possible because Mediatek. Is it true please? Will not break it.
I'm rooted on my Nord2T. Whoever said that does not know what they are talking about.
The original Nord 2 was also mediatek and has a few custom ROMs and everything
I'm not able to boot correct in bootloader. There is written at the display extreme small "Fastboot Mode". If I set command "fastboot oem unlock" there is no reaction and nothing written. Changing with up/down is nothing doing.
Pushing Vol- and Powerbutton ends in recovery. There it is only possible to choose language and then wipe, reboot and power off.
My firmware is: CPH2399_11_A.09
Wrong code not
Code:
fastboot oem unlock
The correct command is
Code:
fastboot flashing unlock
Sorry, can not unlock the bootloader
Both commands failed
PS C:\adb2> fastboot flashing unlock
FAILED (remote: 'Unrecognized command flashing unlock')
fastboot: error: Command failed
PS C:\adb2> fastboot oem unlock
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
PS C:\adb2>
Try using a different ADB and fastboot. I use official platform tools from here
Also what comes up when you type
Code:
fastboot devices
Have downloaded and used the tools from official platform (your link)
PS C:\adb3> fastboot devices
UKGYBYZTL7699T8T fastboot
PS C:\adb3> fastboot flashing unlock
FAILED (remote: 'Unrecognized command flashing unlock')
fastboot: error: Command failed
PS C:\adb3> fastboot oem unlock
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
I'm in "Fastbootd Mode".
The command was "adb reboot fastboot". The command "adb reboot bootloader" does not work at mine N2t
mystery007 said:
Have downloaded and used the tools from official platform (your link)
PS C:\adb3> fastboot devices
UKGYBYZTL7699T8T fastboot
PS C:\adb3> fastboot flashing unlock
FAILED (remote: 'Unrecognized command flashing unlock')
fastboot: error: Command failed
PS C:\adb3> fastboot oem unlock
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
I'm in "Fastbootd Mode".
The command was "adb reboot fastboot". The command "adb reboot bootloader" does not work at mine N2t
Click to expand...
Click to collapse
I had the same problem while opening Bootloader...Tried everything - Windows 10
I did the same on Windows 7 and immidiately bootloader open.
mystery007 said:
Have downloaded and used the tools from official platform (your link)
PS C:\adb3> fastboot devices
UKGYBYZTL7699T8T fastboot
PS C:\adb3> fastboot flashing unlock
FAILED (remote: 'Unrecognized command flashing unlock')
fastboot: error: Command failed
PS C:\adb3> fastboot oem unlock
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
I'm in "Fastbootd Mode".
The command was "adb reboot fastboot". The command "adb reboot bootloader" does not work at mine N2t
Click to expand...
Click to collapse
Did you enable developer options and select Enable OEM unlock first?
garylawwd said:
I'm rooted on my Nord2T. Whoever said that does not know what they are talking about.
The original Nord 2 was also mediatek and has a few custom ROMs and everything
Click to expand...
Click to collapse
Did you pass the safetynet check?
My new Nord 2T is arrived today, I will see how many days it will resist unrooted
cioce said:
Did you pass the safetynet check?
My new Nord 2T is arrived today, I will see how many days it will resist unrooted
Click to expand...
Click to collapse
It will if you flash kdragon safetynet fix in magisk
cioce said:
Did you pass the safetynet check?
My new Nord 2T is arrived today, I will see how many days it will resist unrooted
Click to expand...
Click to collapse
Don't rush and don't do it like me. Here boot images are for 09. So upgrade first.
Safety net passes with magisk module
Root easily hidden with lsposed and shamiko module.
Riski3Run said:
Did you enable developer options and select Enable OEM unlock first?
Click to expand...
Click to collapse
Yes
mystery007 said:
Have downloaded and used the tools from official platform (your link)
PS C:\adb3> fastboot devices
UKGYBYZTL7699T8T fastboot
PS C:\adb3> fastboot flashing unlock
FAILED (remote: 'Unrecognized command flashing unlock')
fastboot: error: Command failed
PS C:\adb3> fastboot oem unlock
FAILED (remote: 'Unable to open fastboot HAL')
fastboot: error: Command failed
I'm in "Fastbootd Mode".
The command was "adb reboot fastboot". The command "adb reboot bootloader" does not work at mine N2t
Click to expand...
Click to collapse
u should not be in fastbootd mode in adb type adb reboot bootloader
then type
fastboot flashing unlock
this should unlock your bootloader

Question OPPO A54 5G - Fastboot Commands dont work

I try to root the OPPO A54 5G. I got into the fastbootd mode and i want to unlock the bootloader.
I have no PIN or something, OEM Unlocking is activated and Developer Options are activated too.
If i execute the command fastboot devices
it shows my device.
If i execute the command fastboot flashing unlock
it says: FAILED (remote: 'Unrecognized command flashing unlock')
but if i execute the command fastboot oem unlock
it says: FAILED (remote: 'Command not supported in default implementation')
Can anyone help me?

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