The fastest way: Settings on your iPhone
Open Settings on your iPhone, then tap General. Scroll down and tap About. Your serial number appears on the screen labeled Serial Number — it's a 12-character code of letters and numbers. You can tap it to copy it to your clipboard, then paste it anywhere you need it.
This method works on every iPhone model and iOS version. The serial number stays the same throughout your phone's life, so you'll see the identical code every time you check. If you're in a hurry or need to share it with Apple support or a repair shop, this is the clearest and fastest way to get it.
The Settings method also works even if your iPhone's physical back is damaged or the printed text has worn away. As long as your phone turns on and you can reach the Settings app, you have access to your serial number.
Key Takeaways
- Your iPhone's serial number is in Settings > General > About, labeled as "Serial Number" — a 12-character code you can copy directly to your clipboard.
- The physical serial number is printed on the back of your iPhone below the camera, though it may be hard to read on newer models with matte finishes.
- You can also find your serial number on the original box your iPhone came in, printed on a label on the back.
- Apple support and repair shops use your serial number to check warranty status, service history, and whether your phone is stolen or blacklisted.
- Your serial number is not a security code — sharing it does not put your device or data at risk.
Finding the serial number printed on your iPhone
Look at the back of your iPhone near the bottom, below the camera module. The serial number is printed there in small text. On newer iPhones with matte finishes, the text can be difficult to read because it blends into the surface. Tilt your phone under a light and look at an angle to make the text stand out.
The printed serial number matches exactly what appears in Settings. If you're having trouble reading it, the Settings method is more reliable — you'll get a clear, copyable version without squinting. The printed version is useful mainly as a backup if your phone won't turn on or if you need a physical record.
On some older iPhone models, the serial number was printed on the SIM tray instead of the back. If you have an iPhone 6s or earlier and can't find it on the back, eject the SIM tray using a SIM ejector tool and look there.
Checking the original box
If you still have the box your iPhone came in, the serial number is printed on a white label on the back. This label also shows your IMEI number (a different 15-digit code used by carriers) and other device information. The serial number on the box matches the one in Settings and on the device itself.
If you've lost the box, don't worry — the Settings method is the standard way to find it, and it's what Apple support will ask you to use anyway. Keep the box in a safe place if you have it, since it's useful for warranty claims and resale verification.
Why you might need your serial number
Apple support asks for your serial number when you contact them about repairs, warranty coverage, or technical issues. It's how they pull up your device history and see what work has been done. Repair shops also use it to verify that your phone isn't stolen or blacklisted on carrier networks.
If you're selling your iPhone, the buyer may ask for the serial number to verify the phone's history and make sure it hasn't been reported lost or stolen. You can share it safely — the serial number alone doesn't unlock anything or give access to your data. Some buyers use it to check the phone's remaining warranty period before purchase.
If you're registering your iPhone for AppleCare coverage or filing an insurance claim, you'll need the serial number on hand. Having it copied to your notes or saved in an email makes the process faster.
What to do if Settings won't open
If your iPhone won't turn on or Settings is crashing, the printed serial number on the back of the device is your only option. Take a photo of it under good lighting so you have a clear copy to reference. If the back is too worn or damaged to read, check your original box or any paperwork that came with the phone.
If you're working with Apple support and can't access Settings, tell them that upfront. They can often look up your account using your phone number or email address instead, though having the serial number speeds things up. If your phone is completely unresponsive, Apple support may be able to retrieve the serial number from their records if you purchased it directly from them or through your carrier.
Frequently Asked Questions
Is the serial number the same as the IMEI?
No. Your serial number is a 12-character code that identifies your specific iPhone device. Your IMEI is a separate 15-digit number that carriers use to track your phone on their network. Both appear in Settings > General > About, and both are printed on your original box.
Can someone use my serial number to unlock my phone?
No. Your serial number is not a security credential — it's just an identifier. Someone with your serial number cannot unlock your phone, access your data, or make changes to your account. Your passcode and Apple ID password are what protect your device.
What if the serial number in Settings doesn't match the one on the back?
This is very rare and usually means the back of the phone has been replaced. Contact Apple support with both numbers — they can investigate whether the phone has been serviced or repaired, and whether the parts are genuine.
Do I need my serial number to set up a new iPhone?
No. You set up a new iPhone using your Apple ID and password. Your serial number is only needed if you're contacting support, registering for warranty coverage, or working with a repair shop.
Where do I find the serial number if I bought my iPhone secondhand?
Use Settings > General > About — that's the most reliable source. If the phone won't turn on, look on the back below the camera. The seller may also have the original box or receipt, which will have the serial number printed on it.