Finding the iPhone serial number or IMEI number

Are you looking for your iPhone serial number or International Mobile Equipment Identity (IMEI) number?

This information can be found in the following locations:
On the iPhone packaging.
On the phone, from the Home screen open Settings > General > About.
In iTunes, hold down the Control key and select Help > About iTunes (on Windows) or iTunes > About iTunes (on the Mac). To pause the scrolling, press the Space bar.