A portable communication device, for implementation with a host vehicle of transportation having an on-board diagnostics port and a limited-access head-unit display. The device includes an on-board diagnostics connector sized and shaped to connect to the on-board diagnostics port of the host vehicle, a hardware-based processing unit in communication with the on-board diagnostics; and a non-transitory storage device in communication with the processing unit, the storage device. The storage includes a media-options presentation module that, when executed by the processing unit: sends, by way of the on-board diagnostics connector and port, media-options data to the host vehicle for presenting user media options by way of the limited-access head-unit display; and receives user-selection data responding to the user media options. The storage also includes a media streaming module that, when executed obtains streaming media based on the user-selection data, and sends the streaming media to the host vehicle for presentation.