DF Memeber "KaChow" has assembled an outstanding and in depth guide for unlocking your Bootloader on those Motorola Droid RAZR HD series devices that can be unlocked with the Dan Rosenberg Exploit! The process is pretty simple and for most people. However there are several snags you can run into that would keep you from being able to do what you need to do. The guide outlines everything that is necessary and the order in which to do what needs to be done! Hopefully if you have had any issues unlocking your bootloader on your Motorola Droid RAZR HD series phone this guide will be exactly what you needed!
This method provides a link for rooting 4.1.2 which is a requirement for unlocking your bootloader. There is no loss of data when unlocking your bootloader, but you should be aware that this will completely void your warranty. You should also be aware that this is an irreversible process considering the fact that this essentially blows a fuse in your device. The only way to relock would be to send it to Motorola and have then replace that fuse which would run you about $150. Just know that you have been warned.
KaChow's Guide here
This method provides a link for rooting 4.1.2 which is a requirement for unlocking your bootloader. There is no loss of data when unlocking your bootloader, but you should be aware that this will completely void your warranty. You should also be aware that this is an irreversible process considering the fact that this essentially blows a fuse in your device. The only way to relock would be to send it to Motorola and have then replace that fuse which would run you about $150. Just know that you have been warned.
KaChow's Guide here