Please how do i unlock the bootloader of my itel s15

[Precioo]

My itel s15 bootloader is locked.. I tried fast boot commands but got an error saying failed : unknown command

 

[mustang7757]

Hi, welcome to AC!
In Developer settings you see OEM unlock toggle on?
Otherwise you can try XDA Forums.

 

[XPact gaming]

My itel s15 bootloader is locked.. I tried fast boot commands but got an error saying failed : unknown command

Exactly the same output I also have the same problem