On a Sony and an iPhone, I'd like to decrease the temperature by 5 to 8 degrees Celsius when the external temperature is 33 degrees. I'm interested in what the devices can do when the temperature reaches 45 degrees. This temperature range significantly impacts the phones, affecting their optimal performance or causing considerable slowdown. The vibration you feel during calls, while a bit concerning due to its size, is acceptable, and the devices are good for activities like sailing or gaming.