1 IF AT ALL POSSIBLE, AVOID DIRECT SUNLIGHT ON YOUR PHONE.
The easiest way to minimize overheating is to keep your phone out of the sun. Your phone collects and retains light and heat from the sun, increasing hotter as it is exposed to it for extended periods of time.
2. DISABLE UNUSED APPS ON YOUR PHONE.
Open, unused programs that run in the background make your phone work harder, causing it to heat up. To remove programs from an iPhone, just press and hold the home button twice before swiping them away. Plus, your phone's battery life will be extended.
3. DO NOT IMPROVE YOUR SCREEN'S BRIGHTNESS.
Increasing the brightness of your screen, as well as running background apps, might cause your battery to work harder and create more heat. Instead, choose a device with an anti-glare cover. This inexpensive solution can help you see your screen in direct sunlight.
4. ON YOUR PHONE, SELECT AIRPLANE MODE..
Airplane mode allows you to perform basic tasks on your phone while turning off non-essential features that might drain your battery.
5. REMOVE YOUR CASE.
Your case isn't helpful if your phone is overheating. Taking off the case allows the phone's heat vents to function properly without being obstructed, helping it to cool down faster.