Abstract: Systems and methods are presented to allow coordination between media end devices such that a user interface on a first end device may be used to manage audio calls, media playback, navigation prompts, or the like, on a second end device. The first end device establishes a first communications channel to a source device and a second communications channel to a second end device. The second end device may also have a communications channel to the source device. The first end device communicates with the second end device on the second communications channel to exchange command-and-control information to influence operation between the second end device and the source device. The source device, however, may be unaware of the second communications channel between the first and second end devices.