Why does the phone irregularly heat up after the system update and changing to a new Redmi 13C 5G?

The reasons for irregular heating up after the system update are listed below:
1. MIUI is a highly customized system with a plethora of features. A new phone has undergone processes such as data recovery and system updates, resulting in some overheating. At the same time, all installed APPs will be compiled after downloading for smoother use, and cloud data will be centrally synchronized. Therefore, the power consumption in the background is high, and the temperature rise of the phone will return to normal conditions after completing all initialization configurations;
2. After just replacing the phone, please update the software version. The software on the old phone is not compatible with the current Android underlying system. Please update the software or uninstall it before reinstalling and using it.