My iPhone 12 mini is getting hot when I charge it. What can I do about this?

Greetings, Phone-Overheating. 

It’s not uncommon for your iPhone to heat up during certain uses. The chances are more likely when using an app that consumes more power. Determine if your iPhone temperature is normal by reviewing the following resource: If your iPhone, iPad, or iPod touch gets too hot or too cold 

If you do not feel that your iPhone temperature is normal, Contact Apple Support for more discussion. 

We hope this helps to further isolate and resolve the issue with the temperature. 

Best wishes. 

Nothing. It is entirely normal for an iPhone to become hot when it (fast) charges