mobile

hi guys,

i tried following a the htc unlock guides. but when i boot my m9 into the bootloader (vol down + power on ) there is no option for fastboot.
when i use the command fastboot devices my device is recognized but i cant use the fastboot oem get_identifier_token command
it just gives me an error.

can someone please give me tip? am i missing something?

thanks in advance for your help