Hello, Often on hot days, and every day for the past week or so, my iphone has constantly freezes and requires hard resets. When it is working it is almost unbearably slow and unresponsive. In the past year, the performance eroded to this level on particularly hot days. But recently it has been like this for the past week, and today, it was completely useless until nightfall. i am not storing it in a hot car, it is in my pocket and on my desk. still it freezes.... .... what should i do? how should i present this to the applestore? thanks, r.