Keep the device away from sources of heat and fire, such as a heater, microwave oven, stove, water heater, radiator, or candle. Stop using your device or applications for a while if the device is overheated. If skin is exposed to an overheated device for an extended period, low temperature burn symptoms, such as red spots and darker pigmentation, may occur. Do not touch the device's antenna. Otherwise, communication quality may be reduced.