In general, it is absolutely necessary avoid too much exposure of the smartphone to the sun.
Pour chill his phone quickly, you have to place it in the shadein a cool place and him remove momentarily its shell. Don’t put it in the fridge. On the other hand, installing it near a fan might turn out to be a good idea. In carpreferably place it in the glove box rather than once morest the windshield!
Most models turn off automatically when they exceed a certain temperature.