A determination unit determines the type of a command received via a communication interface. A request for registration is sent from a user equipment to the serving controller where after it is determined in a second controller that the user equipment supports another security mechanism than the first security mechanism. Additionally, a second privilege protection having at least two sub-privilege levels is further enforced for at least one privilege level of the first privilege protection to further differentiate the privileges otherwise afforded. The limited number of buttons required for the various features of these systems and methods provide vehicle operators, such as automobile drivers, with a safe mechanism and procedure for retrieving and playing customized play lists and particular songs while driving.