Avoid Demanding Tasks on Your iPhone
If the day is too hot for you to handle, chances are your iPhone feels the same way. And if you want to make sure that it doesn’t overheat, you should avoid demanding tasks.
Anything from browsing social media while watching a video to playing intense and demanding games will cause your iPhone to get warm. Additionally, if the temperature in the environment is too high, your iPhone will most definitely get really hot.
Try to do simple tasks with your iPhone until you’re in a cooler place or the temperature drops.