A mobile communication device, comprising: a processor; a wireless communication interface (620, 622, 624) coupled to the processor; one or more sensors comprising an accelerometer or gyroscope or both coupled to the processor and configured to measure orientation and movement of the device; a memory coupled to the processor; and an audio subsystem (644, 700) coupled to the processor, the audio subsystem comprising a first speaker for generating sound waves from analog signals that are generated by the audio subsystem from digital audio representations (682, 684), the audio subsystem further comprising: a power amplifier coupled to the first speaker, and a power supply control configured to provide voltage to the power amplifier at a first voltage level while the mobile communication device is operative in the call mode and configured to provide voltage to the power amplifier at a second voltage level that is higher than the first voltage level while the mobile communication device is operative in the multimedia mode wherein the audio subsystem further comprises a second speaker configured to be muted while the mobile communication device is operative in the call mode and coupled to the power amplifier; and wherein the memory is configured to store executable code which, when executed by the processor, is arranged to select between the call mode and the multimedia mode, the selection between the call mode and the multimedia mode being based, at least in part, on the measurements of orientation and movement of the device obtained from one or more of the one or more sensors; wherein the device operates in the multimedia mode during reproduction of sound reproduced from digital audio from a media file or from a streaming buffer or from both. a processor; a wireless communication interface (620, 622, 624) coupled to the processor; one or more sensors comprising an accelerometer or gyroscope or both coupled to the processor and configured to measure orientation and movement of the device; a memory coupled to the processor; and an audio subsystem (644, 700) coupled to the processor, the audio subsystem comprising a first speaker for generating sound waves from analog signals that are generated by the audio subsystem from digital audio representations (682, 684), the audio subsystem further comprising: a power amplifier coupled to the first speaker, and a power supply control configured to provide voltage to the power amplifier at a first voltage level while the mobile communication device is operative in the call mode and configured to provide voltage to the power amplifier at a second voltage level that is higher than the first voltage level while the mobile communication device is operative in the multimedia mode wherein the audio subsystem further comprises a second speaker configured to be muted while the mobile communication device is operative in the call mode and coupled to the power amplifier; and wherein the memory is configured to store executable code which, when executed by the processor, is arranged to select between the call mode and the multimedia mode, the selection between the call mode and the multimedia mode being based, at least in part, on the measurements of orientation and movement of the device obtained from one or more of the one or more sensors; wherein the device operates in the multimedia mode during reproduction of sound reproduced from digital audio from a media file or from a streaming buffer or from both. a power amplifier coupled to the first speaker, and a power supply control configured to provide voltage to the power amplifier at a first voltage level while the mobile communication device is operative in the call mode and configured to provide voltage to the power amplifier at a second voltage level that is higher than the first voltage level while the mobile communication device is operative in the multimedia mode wherein the audio subsystem further comprises a second speaker configured to be muted while the mobile communication device is operative in the call mode and coupled to the power amplifier; and wherein the memory is configured to store executable code which, when executed by the processor, is arranged to select between the call mode and the multimedia mode, the selection between the call mode and the multimedia mode being based, at least in part, on the measurements of orientation and movement of the device obtained from one or more of the one or more sensors; wherein the device operates in the multimedia mode during reproduction of sound reproduced from digital audio from a media file or from a streaming buffer or from both.