Where to find your iPhone serial number

Your iPhone's serial number appears in three places: on the physical device itself, in the Settings app, and in your Apple account. The easiest route depends on whether your phone is powered on and whether you can see the back of the device.

If your iPhone is on and unlocked, open Settings, tap General, then tap About. Scroll down until you see "Serial Number" — it's a 12-character code of letters and numbers. This method works even if you've forgotten your passcode, as long as you can reach the lock screen and ask Siri to open Settings.

If your phone is off or you prefer a physical check, look at the back of your iPhone near the bottom. The serial number is printed there in small text, along with regulatory information. You may need good lighting or a magnifying glass to read it clearly. On older iPhone models, the serial number also appears on the SIM tray — eject it with a SIM ejector tool or a straightened paperclip to see it.

Key Takeaways

  • Your serial number appears in Settings under General > About, where you can copy it directly to avoid transcription errors.
  • The serial number is printed on the back of your iPhone in small text, making it visible without powering on the device.
  • If you've set up an Apple ID on the phone, your serial number is also stored in your Apple account under device information.
  • A serial number is a 12-character code of letters and numbers unique to your specific iPhone, different from your IMEI or phone number.

Checking your Apple account for the serial number

If you own the iPhone but don't have it with you, you can find the serial number through your Apple account online. Go to appleid.apple.com and sign in with your Apple ID and password. Click "Devices" in the left sidebar to see all phones, tablets, and computers linked to your account.

Find your iPhone in the list and click it. The serial number appears under "Device Information" — you can copy it from there. This method also works if someone else set up the phone on your behalf, as long as it's registered to your Apple ID.

Why you need your serial number

Apple uses your serial number to verify ownership when you contact support, trade in your phone, or file a warranty claim. If your iPhone is lost or stolen, providing the serial number to your carrier and to Apple helps them lock the device remotely so it cannot be reactivated by someone else.

Repair shops and carriers also request the serial number to look up your phone's history, check whether it's under warranty, and confirm it hasn't been reported as stolen. Some insurance companies ask for it when you file a claim. Keeping a record of your serial number in a safe place — separate from the phone itself — means you can provide it even if the device is unavailable.

Serial number versus IMEI and other identifiers

Your iPhone has several different identification numbers, and it's straightforward to confuse them. The serial number is the 12-character code unique to your specific device. The IMEI (International Mobile Equipment Identity) is a 15-digit number that identifies your phone on cellular networks — you can find it in Settings under General > About, or by dialing *#06# on the phone's keypad.

Your phone number is assigned by your carrier and can change if you switch carriers or plans. Your Apple ID is your account with Apple, not tied to any single device. When Apple support asks for your serial number, they mean the 12-character code, not your IMEI or phone number. If you're unsure which number they want, ask them to clarify — providing the wrong one wastes time.

What to do if you can't read the printed serial number

If the text on the back of your iPhone is worn, faded, or damaged, the Settings method is your best option. Open Settings > General > About and look for "Serial Number" in the list. You can tap and hold the serial number to copy it, which is more reliable than writing it down by hand.

If your phone won't power on and you can't read the back, check your original purchase receipt or the box your iPhone came in — Apple prints the serial number on both. If you bought the phone from a carrier like Verizon or AT&T, they have a record of the serial number in your account. Contact them with your phone number or account details and they can provide it.

Keeping your serial number safe

Write down or photograph your serial number and store it somewhere you can find it later — a notes app, a document on your computer, or a physical notebook. Keep this record separate from your phone so you have it if the device is lost, stolen, or damaged.

If you sell or give away your iPhone, erase it completely using Settings > General > Transfer or Reset > Erase All Content and Settings. This removes your data and your Apple ID from the device. The new owner will need to set it up with their own account, but the serial number remains the same — it's tied to the hardware, not to any user.

Frequently Asked Questions

Can someone use my serial number to unlock my iPhone?

No. Your serial number alone cannot unlock your phone or access your data. Someone would need your passcode, Face ID, or your Apple ID password. The serial number is useful for proving ownership to Apple or your carrier, but it's not a security credential.

Is the serial number the same as the model number?

No. Your model number (like A2846) tells you which iPhone version you have — iPhone 15, iPhone 14 Pro, and so on. Your serial number is unique to your specific device. Both appear in Settings under General > About, but they serve different purposes.

What if my serial number has been scratched off?

You can still retrieve it from Settings > General > About, or from your Apple account online. If you need to prove ownership and the physical serial number is unreadable, Apple support can verify your identity through your purchase receipt, Apple ID, or carrier account instead.

Do I need my serial number to update my iPhone?

No. You only need your Apple ID and password to update your iPhone. The serial number is not required for software updates, backups, or restores. You'll need it if you contact Apple support about a hardware issue or warranty claim.