Press MENU > Scroll to Settings > Press E > Scroll to Upgrade > Press E > Scroll to DMR/MotoTRBO > Press E > You will get a message that it has already been activated or to enter the key > Press MENU to go back a step > Scroll to NXDN > Press E > You will get a message that it has already been activated or to enter the key > Press SCAN twice to exit the menus.