Razr Maxx HD, How to wipe data with broken screen
You can obtain the adb and fastboot utilities as part of the Android Software Development Kit (or separately from third parties, but watch out for Trojan binaries). If you install the SDK, you will need to install the Platform Tools and (if using Windows) the USB Driver for Windows.

Once you have them, from whatever source, this is what you will do:


Reboot the phone to the bootloader (fastboot):

adb reboot bootloader


adb may not work if the phone hasn't previously been placed in USB Debugging mode. In this case, boot the phone to fastboot mode by first powering it off, then powering it on by holding all three of the Power, Volume Up and Volume Down keys at the same time for two seconds, then releasing all three keys, then touching Volume Down twice, then Volume Up once.
Check to see if the phone is in fastboot mode. If it doesn't show anything, wait a few seconds and try again:

fastboot devices

Wipe the user data/cache:

fastboot -w