The \"Please wait for the iPhone to cool down before using\" situation on the iPhone may be caused by overheating of the phone. When the iPhone device is running at high load for a long time or the ambient temperature is too high, the system may issue such a prompt. At this point, you need to let the equipment cool for a period of time, and then you can continue to use it after the temperature drops.
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In addition, if the hardware is damaged, such as NTC thermistor damage or chip damage short-circuit caused by the temperature detection system damage, it may also lead to overheating of the device, and then such a warning appears. At this time, it is necessary to shut down the equipment and send it to a professional maintenance organization for repair.
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In short, after such a prompt, measures should be taken as soon as possible to cool the equipment and check whether it needs to be repaired.