A mobile communications device includes a display, one or more sources comprising at least one microphone and at least one camera, a wireless communications module, a main processor, and a secured processor inaccessible by the main processor. A housing supports components of the device and is configured for hand-held manipulation. A shutter is supported by the housing, and comprises a lens shutter situated within the housing and configured to obscure a lens of the at least one camera when activated. A user actuatable switch is coupled to at least the one or more sources, the main processor, the secured processor, and the shutter. The switch is configured to selectively activate and deactivate the lens shutter. The switch is also configured to divert signals produced by the sources away from the main processor when activated, and couple signals produced by the sources to the main processor when deactivated.