Abstract: The invention relates to a mobile communication device including a music player and a method of its operation. In order to improve the usability and to speed the controlling of the implemented music player, a advantageous keyboard layout including a multiple switch is provided. The multiple switch is dedicated to control device applications as well as the music player. Therefore, a mode selector is additionally included to switch the into different input mode allowing to input commands by the multiple switch dedicated to the device applications or the music player, respectively, corresponding to the selected input mode. Additionally, the coloring of the symbol printing on the multiple switch and the mode selector is adapted to the key assignments corresponding to the different input mode to height the visible differentiation from the balance of the keyboard and to lead a user operating the multiple switch.