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Hello Everyone!

I am trying yo unlock the bootloader with no success. Basically, the following command Code:

Fastboot oem get_identifier_token

is hitting the error of:

FAILED (remote: unknown command)

Please, your help will be greately appreciated. Thanks in advance for reading my question.


Device State:


OEM unlocking: is enabled from the developers options. USB Debugging: is enabled from the developers options.

Software Status: Official
Software State: LOCKED
Software Security: S-ON

Device Information: Model Number: HTC One M9
Android Version: 5.1
HTC Sense Version: 7.0
Software Number: 2.10.401.1
Baseband Version: 01.04_U11440601_71.02.50709G_F
Build Number: 2.10.401.1 CL576582 release-keys
Kernel Version: 3.10.49-perf-g901e7f1 and@AABM #1 SMP PREEMPT

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  • oem in the command implies that that command is not a fastboot standard, but is OEM specific. are you sure that your device supports this command? Can you please link to the source of whatever guide you are following? Commented Dec 4, 2015 at 8:15
  • Thank you for your comment. I am following the official tutorial that is listed in the main website of HTC for this specific model.
    – Ken
    Commented Dec 4, 2015 at 10:31

1 Answer 1

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I found the answer to my question at last after hours of researching.

We should execute the command from the fastboot mode (FASTBOOT USB) and not from the bootloader mode (HBOOT). This is a non-default option selectable using the volume buttons in bootloader (HBOOT) mode.That's why it was not working for me.

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  • What is the difference between the two modes?
    – Firelord
    Commented Dec 4, 2015 at 12:52
  • no different between two, mode is bootloader/fastboot, command always start with the word of "fastboot"
    – user175757
    Commented Jul 11, 2016 at 2:32
  • The only command to reboot to fastboot is adb reboot bootloader so What do you mean fastboot mode (FASTBOOT USB) and What is the command used for that? Commented Jul 31, 2021 at 5:54

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