I have a very similar but not identical question.
I live in Ireland now, but I still have my droid 4 from Verizon with me sitting around collecting dust. The phone currently has ICS and is rooted. Is there a way I get this phone to work in Ireland (no 4G countrywide that I know of), or am I stuck?
I'm currently on the 3 network with a crappy samsung galaxy mini however it's not a contract so I can switch if I ever figure out how to get my droid 4 to work on any other network.