you can have direct sunlight heating up the phone on a day that AC is not needed

this issue needs to be handled by the device and not with external resources

Buy a white phone and don't put a case on it.

Or buy a white case. That’s what I did and it seemed to work, as a Sat Nav device at least. Not sure about recording video which will produce more heat.

ha! not in Australia you cant.

That sun is murder on hot phones.

Assuming it’s not a snowy winter day in Michigan… ;)