Here are few of the ways to recognize the IMEI number of the Apple iPhone.

This article shows you several different ways you can locate it. (1) In iTunes 7.3 or later (2) On the back of your iPhone (3) In the iPhone About screen (4) On your iPhone packaging (serial number only).

Let us find out the way to find out the IMEI number from the iTunes 7.3. First, connect the iPhone to the computer. Second, when the iPhone appears in iTunes 7.3 or later, select it. Third, click the Summary tab, and the iPhone's serial number will display on screen.

Note: If you click the words "Serial Number" in this tab iTunes will also display the IMEI of your iPhone.

The second way to find the IMEI number is by : iPhone's serial number and IMEI are engraved on the back metal case.

Moreover, there is another method to find the iPhone serial number and IMEI in the About screen on your iPhone. From the Home screen, tap Settings > General > About.

From the Phone packaging is another method: If you still have the original packaging that your iPhone came in, you can find your iPhone serial number printed on the barcode label that's affixed to the packaging.

For Mac users it is little bit different : Connect iPhone Bluetooth Headset to your Mac via the iPhone Bluetooth Travel Cable or iPhone Dual Dock (disconnect iPhone if it is connected to the cable or dock). In Finder, choose, Apple > About this Mac. Click More Info and then click the reveal arrow next to Hardware. Then click USB. Under USB Device Tree, there will be an entry for iPhone Bluetooth Headset.