FAILED (remote: unknown command) fastboot oem unlock in adb

Question

I tried everything, I have a SAMSUNG GALAXY A02s. I want to unlock the bootloader of my device.

I have enabled OEM unlocking I have enabled USB debugging ^^ ---> developer options..

I also deleted the two adb key files in C:\users\{USER}\.android

STILL I can't unlock my bootloader via fastboot...

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• I did: fastboot OEM unlock --> FAILED
• I did: fastboot oem unlock --> FAILED
• I did: fastboot flashing unlock --> FAILED
• I did: fasboot oem unlock {SERIAL NUMBER/DEVICE NAME} --> FAILED
• I did: fastboot oem unlock critical --> FAILED
• I did: fastboot oem unlock_critical --> FAILED

I also changed my drivers lots of times. So the drivers are fine.

Everytime I do fastboot oem unlock . it gives me:::::: ERROR: FAILED (remote: unknown command)

Please someone help me.

Answer 1

Yoh, in order to unlock oem, go to download mode on your samsung phone. There should be 3 option. One for installing custom room, the other for boot unlocker and the other to cancel downmode. Just try it that way.