Effective use of an iphone in hot countries
Does Apple know that it is impossible to make full, continuous use of an iphone in consistently hot countries?
iPhone 13 mini, 16
Use iOS and iPadOS devices where the ambient temperature is between 0º and 35º C (32º to 95º F). Low- or high-temperature conditions might cause your device to change its behavior to regulate its temperature. Using an iOS or iPadOS device in very hot conditions can permanently shorten battery life.
If your iPhone or iPad gets too hot or too cold - Apple Support