[XperiaXZ]Cannot unlock bootloader, flash and etc

[Mabusaki]

Hi everyone. I am trying to unbrick my Xperia XZ. I tried a lot during these 3 days. Guess I need help.


Here's what happened and actions I took. I can upload screenshots, but I am very exhausted now, and considering you have more knowledge about this topic than me, I don't upload screenshots.

Phone's charge went 0%. I tried to charge it via wallcharger. But stuck on Sony Logo.
Tried ADB Fastboot, flashtool, Xperia Companion, Emma to flash it with stock rom.
Emma says this phone is locked.
Xperia Companion gives error at approx 25%.
Fastboot commands doesn't work. Cannot unlock bootloader via fastboot. remote: 'Command not allowed'. (I can only manage to run fastboot devices command. Cannot even install twrp).
flashtool
Tried unlocking bootloader via BLU, it stucks at Unlock code saved to C:\......

Flashmode
I tried flash 3 different roms, always stuck at Closing TA Partition after Opening Ta Partition 2. Not even 5% of process.

Fastboot Toolbox
Select Kernel to HotBoot - Only way I got screen besides Sony logo. And it says Your device has failed verification and will not work properly.
Select system to Flash - When I choose boot.img or kernel.sin it says remote: 'Command not allowed' as in fastboot.
Select Kernel to Flash - 'Command not allowed'

The only thing comes to my mind is enabling OEM unlocking and debugging mode. But since I cannot boot my device up, I cannot do these either.
I tried execute fastboot oem unlock via adb fastboot cmd, again I got Command not Allowed.

Thanks for attention.

 

[xXx yYy]

ADB and Fastboot are two complety different softwares: ADB deals with Android OS, whereas Fastboot deals with device's bootloader.

Do you use USB drivers provided / supported by Sony?

Drivers - Sony Developer World

developer.sony.com

 

[Mabusaki]

ADB and Fastboot are two complety different softwares: ADB deals with Android OS, whereas Fastboot deals with device's bootloader.

Do you use USB drivers provided / supported by Sony?

Drivers - Sony Developer World

developer.sony.com

I meant I tried cmd thing in the folder called Minimal_adb_fastboot

And yes, I have tried lots of different drivers, either sony or adb drivers. Computer sees the device. And by the way, I have tried on different computers and with different cables, nothing changed.

 

[xXx yYy]

The drivers you have stored in PC's folder "Minimal..." are to be used only with Google phones.

 

[Mabusaki]

The drivers you have stored in PC's folder "Minimal..." are to be used only with Google phones.

Sir
I said that I have tried many drivers. And currently I have installed Sony official driver for my phone .

 

[xXx yYy]

Use command

fastboot flashing unlock

instead of

fastboot oem unlock

May be it will work

 

[Mabusaki]

Use command

fastboot flashing unlock

instead of

fastboot oem unlock

May be it will work

Sir how many times I should say, I have tried almost all commands including this one, it doesn't work, only says, Command not Allowed