My iPhone has never flashed this message. I have never seen an iPhone or heard of an iPhone flashing this message. It exists in case an iPhone gets over heate

My iPhone has never flashed this message. I have never seen an iPhone or heard of an iPhone flashing this message. It exists in case an iPhone gets over heated, say if you were wandering around in the Mojave. The existence of the message is far preferable to the possibility of a melted iPad/iPhone if you took a field trip to a foundry.