can't unlock bootloader - Sony Xperia XZ2 Compact Questions & Answers

Hi there,
I try to install lineageos on my xperia xz2 compact but i dont manage to get the bootloader unlocked.
The rooting status says : Bootloader unlock allowed: Yes. so i thought it should be fine but in fastboot mode the command
Code:
fastboot oem unlock <unlockcode>
gives me:
Code:
...
FAILED (remote: Command not allowed)
finished. total time: 0.069s
I tried with flashtool (found this in some forums) but i get some error as well. Even though i am not sure to use this program properly and I also got some
"No device is registered in Flashtool. You can only flash devices."
error message there.
any ideas?

problem solved, I didn't know that I would have to enable "oem unlock" in the device's developper options. what a fail..

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good friends after an update my google pixel stays in boot loop I have tried several ways to unlock the bootloader to install a stock rom from flashboot but every time i try to unlock the bootloader it tells me that i have to activate or unlock the oem option
I tried to do it with the adb flashtool but it gives me error
c:\adb>fastboot oem unlock
FAILED <remote: oem unlock is not allowed>
finished. total time: 0.044s
c:\adb>
I can not enter the Android system either from my Google Pixel since it is damaged the same to activate the option of OEM
I need someone to help me with this problem because the phone does not let me do anything for the fastboot because the bootloader and the OEM are blocked

Huawei Y5 (DRA-LX3) Unlocking bootloader

Hi, I need some help with unlocking the bootloader of my phone [Huawei Y5 (DRA-LX3)] Please!
So, I am using the adb7fastboot method to unlock the bootloader, there are very limited options to do this process, but I've managed to find what might be the unlocker code for the command:
Code:
fastboot oem unlock xxxxxxxxxx (the unlock code)
Naturally, the warning screen appears on my phone (the one that tells you about erasing all of the data by unlocking the phone), and when I select "Yes" the phone displays an error:
unlock failed... return to fastboot in 3s
And the adb/fastboot window goes something like this:
Code:
...
(bootloader) Start unlock flow
FAILED (remote:
Unlock failed - Err:0x7
)
finished. total time: 6.137s
What do you think? Is there a solution that can save my life? Thanks by the way!

How can I unlock the bootloader?

I've tried to unlock my device with enable OEM unlock in the developer options, because it is needed for enable VoLTE in my regions(with QPST). But it seems that device doesn't recognize it's allowed to unlock. Every advanced fastboot command in fastboot mode returns "FAILED (remote: 'Command not supported in default implementation')".
Is this possible to you who using the device to unlock the bootloader with fastboot? Or, OTA updates I've received blocked that?
How unlock the bootloader?My HTC U20 5G no download mode in bootloader !!!!!
Try
fastboot oem get_identifier_token --- error
fastboot flashing unlock --- error
fastboot oem unlock --- error
Yes I have the same problem. I thought it was Win 10, so I tried Win 7 as well, but got the same error there too.
Check if "USB debugging" and "OEM unlocking" are activated in Developer options
iourikil said:
Check if "USB debugging" and "OEM unlocking" are activated in Developer options
Click to expand...
Click to collapse
Yes, both options are activated (at least in my case).
Both commands "fastboot flashing unlock" and "fastboot oem unlock" result in "FAILED (remote: 'unknown command'), fastboot: error: Command failed".
I have no problem with Desire 20 pro and have no guess why it doesn't work with U20
C:\adb>adb reboot bootloader
C:\adb>fastboot devices
CN06D1V02*** fastboot
C:\adb>fastboot flashing unlock
...
OKAY [ 0.040s]
finished. total time: 0.042s
iourikil said:
I have no problem with Desire 20 pro and have no guess why it doesn't work with U20
Click to expand...
Click to collapse
It also works with the U19e, very annoying that they changed it.
iourikil said:
I have no problem with Desire 20 pro and have no guess why it doesn't work with U20
C:\adb>adb reboot bootloader
C:\adb>fastboot devices
CN06D1V02*** fastboot
C:\adb>fastboot flashing unlock
...
OKAY [ 0.040s]
finished. total time: 0.042s
Click to expand...
Click to collapse
In U20 fastboot can't use this way and In bootloader no download mode to select. >"<
elimiriel said:
I've tried to unlock my device with enable OEM unlock in the developer options, because it is needed for enable VoLTE in my regions(with QPST). But it seems that device doesn't recognize it's allowed to unlock. Every advanced fastboot command in fastboot mode returns "FAILED (remote: 'Command not supported in default implementation')".
Is this possible to you who using the device to unlock the bootloader with fastboot? Or, OTA updates I've received blocked that?
Click to expand...
Click to collapse
for anyone that might come across this problem. I had the same issue trying to use fastboot to relock my bootloader. Found the answer on another forum. I was using adb to reboot to fastboot mode to run the command. This was the problem. I needed to reboot to the bootloader to run the command
elimiriel said:
I've tried to unlock my device with enable OEM unlock in the developer options, because it is needed for enable VoLTE in my regions(with QPST). But it seems that device doesn't recognize it's allowed to unlock. Every advanced fastboot command in fastboot mode returns "FAILED (remote: 'Command not supported in default implementation')".
Is this possible to you who using the device to unlock the bootloader with fastboot? Or, OTA updates I've received blocked that?
Click to expand...
Click to collapse
Try rebooting to the bootloader screen instead of directly rebooting. This solved my problem.
Hi there,
Just wanted to check in and see if anyone has managed to get bootloader unlocked?
Or is the htc u20 out of luck....
arcslt18 said:
Try rebooting to the bootloader screen instead of directly rebooting. This solved my problem.
Click to expand...
Click to collapse
can you teach me how to do that?
thank you
mofish said:
can you teach me how to do that?
thank you
Click to expand...
Click to collapse
Hi, Just manually enter the fast boot mode with power key+Volume Up or Down depending upon the model and make, You can search this online how to enter Bootloader mode for one particular device. Once you are in Bootloader, Try Fastboot mode and Enter your commands. Should work
Anyone figure this out on Nord n200 5g T-Mobile variant? Please help

Question Unlock boot loader?

Hey, has anyone been able to unlock the boot loader yet? I enabled the "OEM Unlocking" option in the Developer Options and I used abd to load the bootloader but when I run "fastboot flashing unlock" or "fastboot oem unlock", it gives:
Code:
FAILED (remote: 'unknown command')
fastboot: error: Command failed
Running
adb shell "getprop ro.oem_unlock_supported"
Click to expand...
Click to collapse
returns 1 so I don't get why it doesn't unlock for me.
Any help is appreciated as I want to run Magisk.
Ziikmar said:
Hey, has anyone been able to unlock the boot loader yet? I enabled the "OEM Unlocking" option in the Developer Options and I used abd to load the bootloader but when I run "fastboot flashing unlock" or "fastboot oem unlock", it gives:
Code:
FAILED (remote: 'unknown command')
fastboot: error: Command failed
Running
returns 1 so I don't get why it doesn't unlock for me.
Any help is appreciated as I want to run Magisk.
Click to expand...
Click to collapse
Hey! Have you solved your problem? I'm having the same issue. Some websites say you need to use Mi Unlock Tool but I get a message that reads "request parameter error" and some websites say you also need to wait for 7 days before you can unlock the bootloader.
¿Alguien lo ha desbloqueado finalmente?
Has anyone succeeded in unlocking boot loader ???
nobody? id like to get one but not if bootloader is not unlockable
A shame. Really wanted this phone, but not without root.

[HELP] Cannot unlock bootloader on meizu 16th

Hi. iv'e been trying to unlock the bootloader on my device in order to install custom rom but i get this error everytime i use fastboot flashing unlock:
FAILED (remote: 'Command not support: the display is not enabled')
fastboot: error: Command failed
And yes i checked that OEM Unlock is enabled and USB Debugging aswell. I also tried typing fastboot oem unlock but it says:
FAILED (remote: 'unknown command')
fastboot: error: Command failed
any ideas why unlocking doesn't work? thanks.
I have the same problem
Is there anyone who can help??
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I refresh, is there anyone who can help?

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