this video includes whole process for unlocking your htc boot loader ..
PLEASE LIKE AND SUBSCRIBE !!!!
download htc syn for www.htc.com
download the zip filehttp://www.mediafire.com/download.php
and unzip it in c drive..
the first step is run
fastboot oem get_identifier_token(if you get bootloader error here see the end of the description)
then paste the unlock_code.bin you recieved in your mailbox in c:\android
now type fastboot flash unlocktoken Unlock_code.bin
it is case sensitive..
Write your comments if i helped you or no.. :)
Boot loader error: if you get the error on fastboot oem get_identifier_token
download the latest hboot boot as i have not shown it how to install (cuz i cant re install it on my device but i have shown you how to download it.. when done downloading just open that exe file when your mobile is connected to your pc in htc sync mode it will update it in a min)
then just check if you have the latest htc sync version installed on your pc
still you have the prob then mail me i will help you in person