Why Phones Heat Up During Video Calls

Some smartphone users notice their devices becoming warmer during lengthy video calls on apps such as WhatsApp, FaceTime, Messenger and Zoom. The rise in temperature generally reflects the demands of running several phone functions at once.

Unlike a voice call, a video conversation keeps the camera and screen active while the phone processes incoming and outgoing sound and images. Maintaining an internet connection adds to that workload, generating heat as the call continues.

Long calls can make the warmth more noticeable, especially when the phone is charging or sitting in a hot environment. A weak connection may also increase power use as the device works to maintain communication.

To reduce heat, users can avoid direct sunlight, lower screen brightness and stop charging the device during a call if it becomes unusually warm. Switching off the camera or taking a break can also ease the workload.

Some warmth during video calls is expected, but excessive heat should not be ignored. If the phone displays a temperature warning or becomes uncomfortable to hold, end the call and let it cool before using it again.