Your iPhone's IMEI is a 15-digit code printed on the SIM tray, visible in Settings, or readable from the original box

The IMEI (International Mobile Equipment Identity) is a unique identifier for your specific iPhone. You need it when reporting a lost phone to your carrier, unlocking your device, checking warranty status, or verifying the phone isn't blacklisted before buying used. Apple doesn't make this number obvious, but it's stored in three places you can reach in under a minute.

The fastest method is to look at the SIM tray — the small metal slot on the side of your iPhone. The IMEI is printed directly on the tray itself. If you've lost the tray or can't read the print, Settings holds the same number. A third option is the original box your iPhone came in, which has the IMEI printed on the back.

Key Takeaways

  • Your iPhone's IMEI is printed on the SIM tray and also stored in Settings under General > About.
  • The IMEI is a 15-digit number unique to your device, not your SIM card or account.
  • You need your IMEI to report a lost phone to your carrier, check if a used phone is blacklisted, or unlock your device.
  • The original iPhone box prints the IMEI on the back if you need a backup source.

Finding the IMEI on the SIM tray

Remove the SIM tray from the side of your iPhone using the small ejector tool (or a straightened paperclip). On most iPhones, the tray is on the right edge. Look at the metal tray itself — the IMEI is printed in small text on the surface. It's a 15-digit number starting with a digit like 3 or 8.

This method works on all modern iPhones and requires no unlocking or navigation through menus. The downside is that the print can fade over time or become hard to read if the tray is scratched. If you can't read it clearly, move to the Settings method instead.

Checking Settings for your IMEI

Open Settings and tap General. Scroll down and tap About. On the About screen, look for the line labeled "IMEI" — it will show your 15-digit number. This method works on all iPhones running iOS 10 and newer.

Settings is the most reliable source because the number is stored digitally and won't fade or wear. You can also copy the IMEI directly from this screen by tapping and holding the number, then selecting Copy. This is useful if you need to paste it into a form or email to your carrier.

Reading the IMEI from your original box

If you still have the original box your iPhone came in, flip it over and look at the back. The IMEI is printed in a barcode section near the bottom, usually labeled clearly. This is a good backup if your SIM tray is missing or damaged and you don't have access to your phone.

The box print is permanent and won't wear away, but this method only works if you kept the packaging. Most people recycle or discard the box within weeks of purchase, so this is rarely the first option.

Why your carrier or Apple might ask for your IMEI

Your carrier uses the IMEI to identify your device on their network. If you report your iPhone lost or stolen, they can blacklist the IMEI so no one else can use it on their network — even with a different SIM card. This is why the IMEI matters more than your phone number or SIM card number.

When you buy a used iPhone, you can give the IMEI to the seller's carrier (or ask the seller to check) to confirm the phone isn't blacklisted. Apple also uses the IMEI to verify warranty coverage and to unlock your device if you forget your passcode and can prove ownership. Some carriers require the IMEI to process repairs or replacements under insurance plans.

The difference between IMEI, ICCID, and serial number

Your iPhone has three separate identifiers, and they're easy to confuse. The IMEI identifies the phone hardware itself. The ICCID (Integrated Circuit Card ID) identifies your SIM card — it changes if you swap SIM cards. The serial number is another hardware identifier Apple uses for warranty and repair tracking.

In Settings > General > About, you'll see all three listed. The IMEI is the one you need for carrier-related issues. The serial number is what you need if you're contacting Apple Support. The ICCID is rarely needed unless your carrier asks for it specifically.

What to do if you can't find your IMEI

If your iPhone is lost or stolen and you can't access Settings, call your carrier directly. They can look up your IMEI using your account information and phone number. This is actually faster than searching for the number yourself if you're trying to blacklist the device quickly.

If you're buying a used iPhone and the seller can't provide the IMEI, ask them to check Settings > General > About in front of you (via video call or in person). If they refuse or the phone won't turn on, that's a red flag — you won't be able to verify the phone's history before purchase.

Frequently Asked Questions

Can someone use my iPhone if they have the IMEI?

No. The IMEI alone doesn't let someone use your phone. They would also need your SIM card, passcode, and Face ID or Touch ID. The IMEI's main use is for carriers to blacklist stolen phones, which prevents the device from connecting to any cellular network — even with a different SIM card.

Does the IMEI change if I replace my SIM card?

No. The IMEI is tied to your iPhone hardware and never changes. Your SIM card has its own separate ID (the ICCID), which changes when you swap cards. This is why the IMEI is useful for tracking a specific device across different carriers or SIM cards.

Is the IMEI the same as my phone number?

No. Your phone number is tied to your SIM card and account, while the IMEI is tied to the physical phone. You can keep the same phone number if you switch phones, but the IMEI will be different because it's a new device.

What if the IMEI on my SIM tray doesn't match Settings?

This is extremely rare but can happen if the SIM tray was replaced. Trust the IMEI in Settings — that's the number your carrier and Apple use. If you're concerned, contact Apple Support with your serial number to confirm which IMEI is correct.

Can I look up someone else's IMEI to see if their phone is blacklisted?

No. Carriers don't provide public IMEI lookup tools. If you're buying a used phone, ask the seller for the IMEI and contact their carrier directly, or use a paid third-party service (though results vary by carrier). The most reliable way is to ask the seller to show you the phone in Settings.