There may be bugs in the system, so it is recommended to try to upgrade to the latest iOS system.
The battery performance of this mobile phone is getting worse, so it is recommended to replace the battery.
Because the ambient temperature is too low, if it is used normally in a place with normal indoor temperature, it is only necessary to maintain a suitable temperature when using it.
There is something wrong with the mobile phone power management module. It is suggested to replace the tailboard.
Apple's mobile phone always shuts down automatically: 1, system firmware compatibility problem.
Apple's ios system is closed, and some people like to break the restrictions of the ios system and escape from prison. Because some functions of ios system firmware have been rewritten, the compatibility between the original system firmware and the mobile phone hardware has been affected, and it is possible that the system firmware after jailbreak may cause the Apple mobile phone to automatically shut down.
The solution to this situation is either to re-brush the machine to escape from prison or to brush Apple's official system firmware.
2. Compatibility of application software plug-ins.
Apple's IOS system is closed. All APP applications running on the IOS system must pass the official certification test of Apple. Only the tested app can be downloaded, installed and used by other users in Apple's APPstore. Some APP applications that affect the security of Apple systems or users are banned from going online by Apple. Because these plug-ins have not been strictly tested by a third party, it may lead to compatibility problems in the system, which may lead to the automatic shutdown of Apple's mobile phone.
The solution to this situation is to uninstall the recently installed APP application plug-in.
3, hardware problems, battery leakage
The charger of iphone is 5V and the charging current is 1A, while the charger of ipad is 5V and the charging current is 2A. Long-term use of ipad charger to charge iphone will damage the battery of iphone. If you use a non-original charger, the charging voltage and current are not strictly controlled, which will also damage the battery of the iphone, so that the battery life of the iphone will be poor and the power consumption will be fast. When there was electricity, it was consumed in a short time.
In this case, of course, you can't start the phone in DFU mode, you can only replace the battery of Apple's mobile phone.
4, hardware problems motherboard power IC
Power IC is a logic control unit on the motherboard, which is used for power supply and power consumption of Apple mobile phone. If there is a calculation error in the logic control unit, it is clear that the mobile phone battery is charged, and it is considered that the mobile phone battery is dead on the ic layer of the motherboard power supply, and the mobile phone is automatically turned off. In this case, you can use DFU hard boot mode to restart the phone. After using the mobile phone for a period of time, if there is a calculation error, the motherboard power IC will automatically turn off again.
In a similar situation, find an official after-sales replacement machine for free during the warranty period. If the warranty period expires, you can only find a maintenance station for maintenance.
If you encounter similar problems, you can diagnose the reason why your mobile phone Apple always shuts down automatically through the exclusion method according to the above four situations.