A mobile communication apparatus capable of presenting themes, a telecommunication system comprising a such apparatus, and a corresponding method are disclosed. The apparatus comprises a processor arranged to generate an audio signal in response to a set theme. The audio signal comprises a speech signal, wherein speech of the speech signal have voice characteristics which depend on the theme. Alternatively, processor is arranged to set a theme in response to contact information stored in a contact information database of the appatatus and associated with actions performed by the apparatus.