Why is my iphone overheating when I am trying to download songs or doing whatsapp chat backup

Jason_rain wrote:

if I should worry.

According to this article: If your iPhone or iPad gets too hot or too cold - Apple Support

You might notice that your device feels warmer when you:

• Set up your device the first time
• Restore from a backup
• Wirelessly charge your device
• Use graphics-intensive or processor-intensive apps, games, or features, including camera apps
• Stream high-quality video

These conditions are normal, and your device will return to a regular temperature when the process is complete or when you finish your activity. If your device doesn't display a temperature warning, you can keep using your device.

Note: The phone monitors its own temperature, and if the temperature goes above the operating limit for the phone, it will shut down and display a message say it has to cool off. If this doesn’t happen it has not overheated.

Jason_rain wrote:

I can feel back of my phone slight overheat these day while doing some basic tasks, I am not sure what is happening and if I should worry.

All of the power that goes into charging your iPhone eventually comes out as heat. Heat from using the backlight. Heat from using main memory. Heat from storage. Heat from accessing cellular and Wi-Fi and GPS networks. Heat from charging the battery. Heat from drawing power from the battery. Heat from all of the processing. Heat from the graphics. Yes, getting warm is entirely normal.

The phone is not overheating unless an "Overheating" message appears on the screen.