A mobile device stores a first command set for voicemail functions of a first voicemail system and a second command set for voicemail functions of a second voicemail system. The mobile device receives a voicemail notification message associated with a voicemail message received at one of the first or the second voicemail systems. The mobile device detects an end-user selection of a visual object which is visually indicative of a voicemail function. In response to the end-user selection, the mobile device selects, from one of the first and the second command sets corresponding to the first or the second voicemail system at which the voicemail message was received, a command code corresponding to the voicemail function. The mobile device sends the selected command code to the first or the second voicemail system for invoking the voicemail function at the first or the second voicemail system.