Body presence sensor calibration

Method for the calibration of the sensor body exists includes a mobile computing device configured to calibrate the sensor body exists on the basis of the current physical configuration mode of the mobile computing device. The mobile computing device may be adjusted to a plurality of physical configuration mode based on the intended use of the mobile computing device. A mobile computing device controls the transmission power level of the associated communication circuit to the sensor body exists based on whether or not the detecting body exists closer to the mobile computing device.