Verizon will give you the unlock code free if the phone has been activated for a while. Call the global department and ask for the SIM unlock code for your device. You will need the MEID number of your phone, so call from a seperate device.
I recently got my Verizon droid 3 activated on net10 with data and everything works with no simcard....they said these CDMA phones r compatible and don't need a sim...