Bootloader

[NeerZayn]

hi! i am from nepal and i need help. ihave vivo v9 phone and i wanna unlock bootloader of my phone and when i try to unlock by using "cmd" it is showing:
...
FAILED (remote: unknown command or device is lock)
finished. total time: 0.011s

i need help please

 

[Steven58]

hi! i am from nepal and i need help. ihave vivo v9 phone and i wanna unlock bootloader of my phone and when i try to unlock by using "cmd" it is showing:
...
FAILED (remote: unknown command or device is lock)
finished. total time: 0.011s

i need help please

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