There is only one that I know of, and in almost every instance the phone doesn't operate as smoothly as normal and there can be software crashes. Cricket comes to mind. Try
[Tutorial] Full Flash Verizon Motorola RAZR to Cricket Wireless (talk, text, MMS, and Internet). This is an entire thread devoted to a known working version of the OS for the Droid RAZR/MAXX flashed to Cricket.
I can not attest to whether this will work on your phone or not. You will need to do the proper research and reading of the instructions through at least once, completely BEFORE you even begin thinking about taking on such a task. I can also not attest to whether you can ever reflash the phone back to Verizon.
In other words, proceed at your own risk. However, GOOD LUCK! :biggrin: