Z3X I can't unlock bootloader

[Gsm_Master]

Hello team
When i try unlock bootloader,it says this
Phone model is redmi 6a
I tried all tools.Phone has mi account.
Here is pic

 

[danylvine]

Hello team
When i try unlock bootloader,it says this
Phone model is redmi 6a
I tried all tools.Phone has mi account.
Here is pic

which security date has?

 

[Gsm_Master]

which security date has?

2020.08.01

 

[danylvine]

2020.08.01

2020.08.01

you must try it on umt qcfire 8.7