1. Too much open software, too many background tasks, and too much heat caused by a program occupying hardware resources. For example, navigation, video recording, etc. Turn off the app or restart it.
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2, the use of beta version of the system, due to the imperfect system, resulting in high power consumption of the mobile phone, large heat. Restore the system to the latest official version.
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3, hardware damage, due to liquid intake, external force and other human factors caused by NTC thermistor damage or chip damage short-circuit caused by temperature detection system damage. Example Damage to the NTC thermistor and power management chip will cause the iPhone to enter the overheated protection state. At this time, the user needs to do is to shut down the device and send the device to Apple after sale
First of all, you can put the phone in a ventilated place to cool down, or use a hair dryer to blow the back cover of the phone, and then try to restart the phone after the heat is cooled to room temperature.
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2, if you can not start normally, you can try to hold down the Home button and the power button at the same time, hold for more than 10 seconds to force power on, until you see an Apple logo on the screen of the phone, indicating that the restart is successful, you can use normally.