In reimagining the iPhone from the ground up with new features like wireless charging, Apple will reportedly also have to rethink how the handset is built, adding a thin graphite sheet to the handset's internals to prevent overheating.
"iPhone 8" OLED concept via iMore.
This year's anticipated flagship iPhone, known colloquially as an "iPhone X" for the smartphone's 10th anniversary, is expected to switch to a glass external casing while also offering wireless charging. Wireless charging adds heat, and glass handles that heat poorer than metal.
In addition, according to analyst Ming-Chi Kuo of KGI Securities, the switch to a new film sensor for 3D Touch in the new handset is more sensitive to heat. As a result, he expects that Apple's "iPhone X" or "iPhone 8" will gain a graphite sheet to help dissipate heat.