Don’t Use Your iPhone While It’s Charging
We’ve said it before, and we’ll say it again: using your iPhone while it’s charging will most likely cause it to overheat.
Overall, it’s best to let your iPhone charge by itself. If it’s a really hot day, chances are it’s going to get warm by itself. And if you are also using it while it’s charging, it will definitely overheat. Not only that, but it might directly damage your battery.
Of course, you won’t have a problem if you need to make a quick phone call or check a notification. But if you plan on browsing social media while your iPhone is charging, it’s best to give it a rest and do something else.