Currently Being ModeratedJun 16, 2013 9:17 AM (in response to jog50)
Check out the following article, it goes over operating temperatures and temperature management of your iPhone.
When using the device or charging the battery, it is normal for it to get warm. The exterior of the device functions as a cooling surface that transfers heat from inside the device to the cooler air outside.
If the interior temperature of the device exceeds the normal operating range, the device will protect its internal components by attempting to regulate its temperature.
Have a good one,
Currently Being ModeratedJun 17, 2013 1:59 AM (in response to Delgadoh)
Thank you David.