Fastboot saying "Unsupported command" Hey guys i just rooted my Motorola Droid RAZR (HD) with kingroot and i want to install CM 12.1 nightly. Before i proceed, i need to unlock my bootloader. After sitting infront of PC for 3-5 hours now, i finally give up.

I downloaded Android SDK + fastboot. Enabled USB debugging and booted phone in fastboot mode. The problem is, when i try the oem commands, get_unlock_data for instance, it says "unsupported command". I am really sick of it, i need serious help.

Any alternatives to get unlock data or unlock bootloader would be appreciated.
The Droid Razr HD cannot be unlocked using the standard Moto unlock procedure from there website, the only known way of unlocking the bootloader after root is achieved is via Motopocalypse written by Dan Rosenberg and available from his blog site here. 

The basic jist of it is from the link above is:

Instructions

The tool may be downloaded here. It may be used as follows:


Extract the entire contents of the zip file.
If you are using Windows, ensure you have installed the latest Motorola USB drivers available for your phone.
Ensure your device has been rooted and you have a working installation ofsu.
Ensure USB Debugging mode is enabled on your device.
If you are using Windows, navigate to the extracted directory and execute run.bat. If you are using Linux or OS X, navigate to the extracted directory in a terminal and execute ./run.sh.


You may also be interested in the RazrHD Toolkit 5.0 which can automate some of the processes involved, but I generally recommend doing it manually, so if something goes wrong you can see what happens and potentially correct the issue. All in one tool kits tend to mask the processes, which if they work is fine, but if there is a failure it can be very difficult to diagnose and correct.