Operate iPhone 3G and iPhone 3GS in a place where the temperature is between 0º and 35º C (32º to 95º F). Low- or high-temperature conditions might temporarily shorten battery life or cause the device to temporarily stop working properly.

Store iPhone 3G and iPhone 3GS in a place where the temperature is between -20º and 45º C (-4º to 113º F). Don’t leave the device in your car, because temperatures in parked cars can exceed this range.

If the interior temperature of the device exceeds normal operating temperatures, you may experience the following as it attempts to regulate its temperature:

• The device stops charging
• Display dims
• Weak cellular signal
• Temperature warning screen appears with the message "iPhone needs to cool down before you can use it" (see image at side)

• Note: When this message appears, the device may still be able to make emergency calls.

  Some conditions and activities that may activate the Temperature warning message:

• Leaving the device in a car on a hot day.
• Leaving it in direct sunlight for extended amounts of time.
• Using certain applications in hot conditions or direct sunlight for long periods of time, such as GPS tracking in a car on a sunny day or listening to music while in direct sunlight.

Safety Standards:

iPhone 3G and iPhone 3GS comply with the safety standard for Safety of Information Technology Equipment, IEC 60950-1.

This safety standard has been adopted by many countries and is referred to as the following:

• UL 60950-1 in the United States
• CSA 60950-01 in Canada
• EN60950-1 in Europe
• AS/NZS 60950:1 in Australia and New Zealand.