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 as a string of numbers and letters — it looks something like "F2NNLW31Q05M". You can tap and hold the serial number to copy it to your clipboard if you need to paste it elsewhere.

This method works on all iPhone models running iOS 10 and later. The serial number stays the same throughout your phone's life and never changes, even after software updates or factory resets.

Key Takeaways

  • Your iPhone's serial number is in Settings > General > About, where you can copy it 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 metal backs.
  • Your serial number is different from your IMEI number — the IMEI is also in Settings > General > About, listed separately.
  • You need the serial number to contact Apple Support, check warranty status, or report a lost or stolen phone to your carrier.
  • If you have already sold or lost your iPhone, you can find the serial number in your Apple ID account under Devices.

Finding the serial number printed on the back of your iPhone

The serial number is engraved on the back of your iPhone, usually below the camera lens. On older iPhone models with glass backs, it is easier to read. On newer models with aluminum or stainless steel backs, the text is smaller and may require good lighting or a magnifying glass to read clearly.

The printed serial number matches exactly what appears in Settings. If you are having trouble reading the engraved number, the Settings method is faster and more reliable. You do not need to physically locate the printed number unless you are verifying that the phone in your hands matches your records.

The difference between serial number and IMEI

Your iPhone has two separate identification numbers. The serial number identifies your specific device. The IMEI (International Mobile Equipment Identity) identifies your phone on cellular networks. Both appear in Settings > General > About, listed as separate items.

Apple Support usually asks for the serial number. Your carrier (Verizon, AT&T, T-Mobile, etc.) may ask for the IMEI when you report a lost phone or switch carriers. If you are not sure which one you need, check the support page or call the organization asking for it — they will tell you which number to provide.

Finding your serial number if you no longer have the phone

If you sold, traded in, or lost your iPhone, you can still find the serial number through your Apple ID. Sign in to appleid.apple.com on any web browser, then click Devices in the left menu. Your current and past iPhones appear in a list with their serial numbers next to them.

This works only if the phone was registered to your Apple ID while you owned it. If you bought a used iPhone or inherited one, the serial number will not appear in your account — you would need to check the device itself or contact the previous owner.

When you need your iPhone's serial number

Apple Support asks for your serial number when you contact them about repairs, warranty coverage, or technical issues. The serial number helps them pull up your device history and confirm what model you own. You also need it to check your warranty status on Apple's website or to register your device for support.

If your iPhone is lost or stolen, provide the serial number to your carrier so they can blacklist the device on their network. Law enforcement may also ask for it when filing a report. Some insurance companies require the serial number to process a claim for a damaged or missing phone.

Troubleshooting if the serial number looks wrong

If the serial number in Settings does not match the one printed on the back of your phone, the phone may have been repaired or refurbished. Apple replaces the back casing during some repairs, which means the printed number may not match the device's actual serial number stored in the system. The number in Settings is always the correct one — that is what Apple's records use.

If you suspect the phone is counterfeit or stolen, contact Apple Support with the serial number and they can tell you the phone's history, original purchase date, and whether it was reported as lost or stolen. Do not assume the phone is fake just because the numbers do not match — mismatched numbers usually mean a legitimate repair.

Frequently Asked Questions

Can someone use my serial number to unlock my iPhone?

No. The serial number alone cannot unlock your phone or access your data. Someone would need your passcode or Face ID to unlock it. The serial number is useful for support and warranty purposes, but it is not a security credential. You can share it with Apple Support or your carrier without worry.

Is the serial number the same as the model number?

No. The model number (like "A2342") tells you which iPhone generation you own. The serial number is unique to your individual device. Both appear in Settings > General > About, but they are different. The model number is the same for all iPhone 15 Pro Max phones, while your serial number is unique to yours.

What if I cannot see the serial number in Settings?

Make sure you are in Settings > General > About. If the screen is blank or the serial number field is missing, restart your iPhone and try again. If it still does not appear, your phone may have a software problem — contact Apple Support and provide any other information you can (like the model number or IMEI).

Do I need the serial number to sell my iPhone?

You do not need it to sell the phone, but the buyer may ask for it to verify the device is not stolen or blacklisted. Providing the serial number to a buyer is safe — it does not give them access to your data or accounts. Make sure you erase the phone and sign out of your Apple ID before handing it over.