but when I try to turn on the phone with the other carrier (tracfone) sim card in it, it just stays on the hello moto screen, anyone know what to do from there?
if you need to unlock your phone codes is the best way. as your provider gave you the code you can follow these instructions to get your phone unlocked.
1 - Switch ON your Motorola RAZR MAXX with a NOT ACCEPTED SIM Card,
2 - Phone will display "Enter Special Code",
3 - You can now enter the Unlock Code.
you can also get futher instruction or unlock codes for any mobile at Ihav.net