Q: My iPhone 5S overheats with regular use (calls/texting).

Hi Luca,

Welcome to the Apple Support Communities! I'm a bit unclear on what you mean specifically when you say that your iPhone is "overheating" (just warm to the touch, or actually giving you a temperature warning screen), but if you have concerns regarding the temperature of your phone during usage, you may find the information and steps outlined in the following article helpful:

Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures - Apple Support

Regards