How to Find the Serial Number for Your iPhone

Every iPhone has a unique serial number — a string of letters and numbers Apple uses to identify your specific device. You might need it to check warranty status, arrange a repair, verify authenticity when buying second-hand, or contact Apple Support. The good news: there are several ways to find it, and at least one method will work regardless of your situation.

What Is an iPhone Serial Number?

An iPhone serial number is typically 12 characters long, combining letters and numbers. It encodes information about where and when your device was manufactured, along with a unique identifier for that individual unit. It's different from your IMEI (used by carriers to identify your device on a network) and your UDID (used mainly by developers), though all three serve as device identifiers in different contexts.

Apple uses the serial number to look up your device's warranty coverage, confirm eligibility for service, and verify whether a device has been reported lost or stolen.

Method 1: Find It in Your iPhone's Settings

This is the fastest method if your iPhone is powered on and accessible.

1. Open the Settings app
2. Tap General
3. Tap About
4. Scroll down to Serial Number

On most iOS versions, you can tap and hold the serial number to copy it directly to your clipboard — useful when filling out support forms or warranty checks.

Method 2: Check the Original Packaging 📦

If you still have the box your iPhone came in, the serial number is printed on a label on the side or back of the box, usually alongside the barcode and model number. This is particularly useful if:

• Your iPhone screen is cracked or unresponsive
• The device won't power on
• You're buying or selling a used iPhone and want to verify the device matches the box

Method 3: Use iTunes or Finder on a Computer

If your iPhone won't turn on or you can't navigate Settings, connecting it to a computer is a reliable fallback.

On macOS Catalina (10.15) or later:

1. Connect your iPhone via USB
2. Open Finder
3. Select your iPhone from the sidebar
4. Click on the device name or model to cycle through displayed information — the serial number appears alongside other details

On Windows or older macOS:

1. Connect your iPhone and open iTunes
2. Click the device icon near the top left
3. On the Summary tab, click the text showing your iPhone model to reveal the serial number

Method 4: Check Apple ID / iCloud

If you've previously signed in with your Apple ID, Apple stores device information in your account.

1. Go to appleid.apple.com on any browser
2. Sign in and scroll to the Devices section
3. Select your iPhone from the list
4. The serial number and other details will be displayed

This works even if you no longer have physical access to the device — useful for insurance claims or if a phone has been lost or stolen.

Method 5: Read It Directly from the Device (Older Models)

On iPhone models before the iPhone 11, Apple printed the serial number directly on the physical hardware:

From iPhone 11 onward, Apple removed engraved text from the back panel, so physical inspection is no longer a reliable method for newer devices.

What If the Serial Number Doesn't Show Correctly?

Occasionally, Settings may display "Unknown" for the serial number. This can happen after:

• A software restore that didn't complete correctly
• Third-party screen or component repairs that affected device recognition
• Hardware damage to the logic board

In these cases, connecting to a computer via iTunes or Finder sometimes retrieves the number correctly. If not, Apple's in-store diagnostics tools can often pull it directly from the device hardware.

Verifying a Serial Number on Apple's Website 🔍

Once you have the serial number, you can enter it at checkcoverage.apple.com to see:

• Whether the device is still under Apple's limited warranty
• Whether AppleCare+ coverage is active
• The estimated expiry of any active coverage

This check is especially valuable when purchasing a used iPhone — it confirms the device is legitimate and gives you a clear picture of remaining coverage.

The Detail That Changes Everything

Finding the serial number is straightforward in most scenarios, but which method actually works for you depends on factors specific to your situation: whether your screen is functional, whether you have the original box, which iOS version is installed, and whether you've linked the device to an Apple ID. Someone troubleshooting a cracked-screen iPhone has a completely different path than someone verifying a second-hand purchase sight unseen. The right starting point depends entirely on what you're working with.