How to Find the Serial Number on an iPhone

Every iPhone has a unique serial number — a 12-character alphanumeric string that Apple uses to identify your specific device. You'll need it for warranty checks, repair requests, trade-ins, AppleCare enrollment, and sometimes to verify a used iPhone before buying. The good news: there are several ways to find it, and most take under a minute.

Why Your iPhone Serial Number Matters

The serial number isn't just an administrative detail. It's the key Apple uses to look up your device's warranty status, repair history, and manufacturing details — including which factory produced it and when. When you contact Apple Support, bring a device in for service, or check if a refurbished iPhone is legitimate, the serial number is what they reference.

It's also how you verify authenticity. Counterfeit or heavily damaged iPhones sometimes have mismatched or invalid serial numbers, which Apple's lookup tools will flag immediately.

Method 1: Find It Directly in iPhone 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 iPhones, you can tap and hold the serial number to copy it to your clipboard — useful when you need to paste it into Apple's warranty checker or a support form.

📱 This method works on every iPhone model running a current or recent version of iOS. The location has remained consistent across iOS versions.

Method 2: Check iTunes or Finder on a Mac or PC

If your iPhone screen is damaged, disabled, or won't turn on, connecting it to a computer is often the next best option.

On a Mac running macOS Catalina or later:

1. Open Finder
2. Connect your iPhone via USB
3. Select your device in the Finder sidebar
4. Your serial number appears under the device name on the General tab

On a Mac running macOS Mojave or earlier, or on Windows:

1. Open iTunes
2. Connect your iPhone via USB
3. Click the device icon near the top left
4. Your serial number appears in the Summary panel

In both cases, clicking the serial number display may cycle through other identifiers like the IMEI or UDID — keep clicking until you see the format you need.

Method 3: Check the Physical iPhone 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, along with the model number and IMEI. This is especially useful for:

• Older devices with worn or hard-to-read hardware engravings
• Devices that won't power on
• Verifying the serial number before you even set up a new phone

The box label also includes a barcode that contains the serial number, which some retailers and repair shops can scan directly.

Method 4: Read It Off the Device Hardware

On older iPhone models, Apple engraved the serial number directly onto the hardware:

For iPhone 7 and newer, Apple removed the hardware engraving. If you have a recent model without a working screen, you'll need to use the computer method or the original packaging.

Method 5: Check Apple ID or iCloud

If you've signed into iCloud on the device at any point, Apple links the serial number to your Apple ID account.

1. Go to appleid.apple.com in any browser
2. Sign in with your Apple ID
3. Scroll to the Devices section
4. Select the iPhone — the serial number is listed there

This method is particularly valuable if the device is lost, stolen, or no longer in your possession but was previously linked to your account.

Method 6: Check Your Apple Support or Purchase Records

If you registered the device with Apple or purchased it through Apple directly, the serial number may appear in:

• Your Apple Support profile under registered devices
• An email receipt from Apple if you bought online
• A carrier contract or upgrade document if the phone was sold through a carrier

The reliability of this method varies — not every purchase or registration captures the serial number in an easily retrievable format.

What the Serial Number Tells You (and What It Doesn't)

Apple's serial number format encodes information about manufacturing location, production year and week, and a unique device identifier. Older serials used a structured format where specific characters indicated the factory and production date. Apple shifted to a more randomized format in recent years, so decoding modern serial numbers character-by-character is less reliable than it once was.

What Apple's own tools will tell you when you enter a valid serial number:

• Warranty coverage status (in or out of warranty)
• AppleCare eligibility or active coverage
• Whether the device is eligible for a repair program

What you won't get from the serial number alone is detailed repair history — that requires Apple Support account access or an authorized service provider lookup.

When the Serial Number Doesn't Match

If you're checking a used iPhone and the serial number shown in Settings doesn't match what's printed on the box or the device, that's a significant red flag. It can indicate the device has been opened and components swapped — something Apple's diagnostics and some third-party tools will also detect. Mismatched serials on second-hand devices are worth investigating before completing any purchase.

The method that works best for finding your serial number depends on the state of your device, whether you have access to the original packaging, and whether the phone is linked to an active Apple ID — each situation points toward a different path.