A portable communication device (100) includes at least one sensing circuit (101) and a processor (104), and operates in accordance with a corresponding method of operation. The sensing circuit detects (205) either a characteristic of an external environment containing the portable communication device (e.g., a chemical in the air or acceleration of the device) or a characteristic of the portable communication device user (e.g., heart rate or blood sugar content), and generates a signal (207) representative of a feature of the sensed characteristic. The processor receives the signal and initiates an event based at least on the feature of the sensed characteristic as represented by the signal. Events include, but are not limited to, one or more of the following: alerting the device user, transmitting a signal (e.g., an emergency call) to a remote communication device, re-sensing the characteristic or sensing another characteristic, and modifying a setting or profile of the device.