If you’ve ever had to contact Apple for iPhone service, or had to call your cellular carrier to make changes to your account, you’ve probably been asked to provide a cryptic number to uniquely identify your iPhone. In Apple’s case, your serial number is used to track warranty service, and with your cellular carrier, your IMEI, or International Mobile Station Equipment Identity, is a number that uniquely identifies your mobile phone number on the cellular network.
You can easily find these by going into your iPhone Settings app and choosing General, About, and then copying them to your iOS clipboard by tapping and holding on them, but this doesn’t really help if you need to access these numbers from a desktop computer, such as when you need to paste into an online form in a web browser.
The good news is that if you need to get at these numbers from your Mac or PC, there’s an easier way than emailing the number to yourself — as long as you’ve associated your iPhone to iTunes on your computer, you can find these numbers hidden away on your device’s “Summary” screen. The Serial Number is readily shown right beneath your iPhone’s phone number, but if you click on the phone number field, it will toggle between your phone number and your IMEI as well as your Mobile Equipment Identifier (MEID), and SIM card’s Integrated Circuit Card Identifier (ICCID) with each click.
Similarly, the Serial Number field can also show your Unique Device Identifier (UDID), Exclusive Chip Identification (ECID), and Product Type. You can right-click on any of these numbers to copy them to your clipboard, making it easy to grab them and paste them into any form where they may be needed, or easily read them off and recite them back to your carrier’s customer service provider without having to take your iPhone away from ear..