A method comprising steps performed by a mobile computing device of: determining a physical configuration mode of the mobile computing device from first sensor data received from a first sensor; and determining whether the present physical configuration mode of the mobile computing device is a tent mode or a tablet mode; characterised by: calibrating, when the present physical configuration mode is determined to be the tent mode or the tablet mode, a second sensor of the mobile computing device based on the present physical configuration mode; determining a body presence of the user based on second sensor data from the calibrated second sensor, wherein the body presence indicates a distance of the user from the second sensor; varying a minimum distance threshold value and a maximum distance threshold value based on the present physical configuration mode, wherein the minimum distance threshold and maximum distance threshold define a proximity threshold of the mobile computing device; determining that the body presence of the user is within the proximity threshold when the body presence is greater than the minimum distance threshold from the second sensor and less than the maximum distance threshold from the second sensor; and reducing a transmit power level of a wireless communication circuit to a lower transmit power level, in response to determining that the body presence of the user is within the proximity threshold of the mobile computing device. determining a physical configuration mode of the mobile computing device from first sensor data received from a first sensor; and determining whether the present physical configuration mode of the mobile computing device is a tent mode or a tablet mode; characterised by: calibrating, when the present physical configuration mode is determined to be the tent mode or the tablet mode, a second sensor of the mobile computing device based on the present physical configuration mode; determining a body presence of the user based on second sensor data from the calibrated second sensor, wherein the body presence indicates a distance of the user from the second sensor; varying a minimum distance threshold value and a maximum distance threshold value based on the present physical configuration mode, wherein the minimum distance threshold and maximum distance threshold define a proximity threshold of the mobile computing device; determining that the body presence of the user is within the proximity threshold when the body presence is greater than the minimum distance threshold from the second sensor and less than the maximum distance threshold from the second sensor; and reducing a transmit power level of a wireless communication circuit to a lower transmit power level, in response to determining that the body presence of the user is within the proximity threshold of the mobile computing device. calibrating, when the present physical configuration mode is determined to be the tent mode or the tablet mode, a second sensor of the mobile computing device based on the present physical configuration mode; determining a body presence of the user based on second sensor data from the calibrated second sensor, wherein the body presence indicates a distance of the user from the second sensor; varying a minimum distance threshold value and a maximum distance threshold value based on the present physical configuration mode, wherein the minimum distance threshold and maximum distance threshold define a proximity threshold of the mobile computing device; determining that the body presence of the user is within the proximity threshold when the body presence is greater than the minimum distance threshold from the second sensor and less than the maximum distance threshold from the second sensor; and reducing a transmit power level of a wireless communication circuit to a lower transmit power level, in response to determining that the body presence of the user is within the proximity threshold of the mobile computing device.