The iPhone 11 has wireless charging, but this can cause heat problems. Since the principle of wireless charging is to convert electrical energy into heat energy, a certain amount of heat will be generated during the charging process. This heat is transferred through the back of the iPhone, thus creating the impression of heat.
However, this heating phenomenon is normal in the normal charging process. If you find abnormal high temperature or other problems, it is recommended to replace the charger or go to Apple after-sales repair.
When the mobile phone is charging, especially when the mobile phone power is less than 40%, the charging speed will be faster, and the heat will be relatively large. In addition, many users will not turn off the phone when charging, in this case, the heat dissipation is less than the heat production, so the back shell of the phone will heat up.