For those of you traveling international with your Verizon Droid Razr Maxx HD:
The phone is GSM unlocked. I just went to Colombia last week, turned off my phone, took out my Verizon 4G SIM, popped in a local SIM (Movistar), turned phone on, changed network settings from CDMA to GSM, activated the internet plan with the Movistar sim and BOOM!! right away I had HSPA+ (equivalent to 4G) and/or 3G (in remote areas).
This phone is awesome.
When I got back in the States, I reverted the process, turn off, removed Movistar sim, put in Verizon's and changed network settings back to CDMA and everything was back to normal.
Hope it helps!