A computerized method is implemented by a communication device for evaluating levels of importance of missed incoming calls. One or more reference parameters in relation to incoming calls received by the communication device are defined, a function for evaluating levels of importance of the missed incoming calls is formed using the one or more reference parameters. When an incoming call is received by the communication device, whether the received incoming call is missed is determined If the received incoming call is missed, the one or more reference parameters in relation to the received incoming call are obtained. A level of importance of the missed incoming call is evaluated by applying the obtained one or more reference parameters to the function.