It is not possible to measure temperature using Remote Photoplethysmography (rPPG) technology and a mobile phone at this current time. rPPG technology can only measure vital signs such as heart rate, respiratory rate, and blood oxygen saturation by analyzing changes in blood flow in the skin captured by the camera on a mobile phone or other device. Temperature measurement requires a different type of sensor, such as a thermistor or infrared sensor, which can detect and measure changes in temperature directly. While some mobile phones do have infrared sensors for measuring temperature, these sensors are not precise or accurate enough for medical use. Therefore, traditional methods of measuring temperature, such as using a thermometer, remain the most accurate and reliable for measuring body temperature.