reference :
http://vulnfactory.org/blog/2013/04/08/motorola-bootloader-unlocking/
instructions
the tool may be downloaded here. It may be used as follows:
1. Extract the entire contents of the zip file.
2. If you are using windows, ensure you have installed the latest motorola usb drivers available for your phone.
3. Ensure your device has been rooted and you have a working installation of “su”.
4. Ensure usb debugging mode is enabled on your device.
5. 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”.
Download >>
http://vulnfactory.org/public/motopocalypse.zip
@djrbliss wins the bounty of $835
donate to dan [link] to say thanks
details on how djrbliss did this :
http://blog.azimuthsecurity.com/2013/04/unlocking-motorola-bootloader.html