Buying Guides

A used iPhone can look perfect, power on fine, and still be a $600 paperweight. The difference between a bargain and a brick is a 15-digit number printed in the phone's settings — and a two-minute check most buyers skip.

That number is the IMEI. Before you hand over money for any used iPhone, an IMEI check tells you whether the phone is stolen, locked to a carrier, still tied to someone else's Apple ID, or not the model the seller claims. Here is exactly what an IMEI check reveals, what it cannot tell you, and the six checks to run before you pay.

Last updated: October 16, 2026. Free-check details (CTIA Stolen Phone Checker limits, Apple's coverage tool) and paid-report prices verified against provider pages in October 2026 — confirm live prices before you buy, as services change.

What is an IMEI?

IMEI stands for International Mobile Equipment Identity. It is a unique 15-digit number assigned to every cellular phone — a fingerprint that no two phones share. Carriers, Apple, and global blocklists all key their records to it, which is why one number can answer so many questions about a device.

Two related numbers are worth knowing. The serial number is Apple's own identifier (10–12 characters) — it is what Apple's coverage tool asks for, not the IMEI. And dual-SIM iPhones have two IMEIs (IMEI and IMEI2), one per SIM slot. When you check a dual-SIM phone, check both.

How to find an iPhone's IMEI

Ask the seller to show you one of these in person or on a live video call — a screenshot of an IMEI is easy to fake.

• Dial *#06# in the Phone app. The IMEI appears instantly, even with no SIM and no signal.
• Settings → General → About. Scroll to IMEI (and IMEI2 on dual-SIM models). Long-press to copy it.
• The original box. The IMEI is printed on the barcode label. It must match the one in Settings — a mismatch is a major red flag.
• The SIM tray. On models with a physical tray, the IMEI is engraved on it (iPhone 6s through 13; newer US models are eSIM-only and have no tray).
• Apple ID account. If you already own the phone, it is listed under your devices at your Apple Account page.

One safety rule: never post your own IMEI publicly — on a forum, a listing photo, or social media. A stranger with your IMEI can file a false stolen report or clone it onto another device, and untangling that is your problem, not theirs. Share it only with a buyer you are dealing with directly, or with a check service you trust.

What an IMEI check reveals

A full IMEI report pulls together records from Apple, carriers, and blocklists. Here is what each field means — and why it matters before you buy.

What an IMEI check does NOT reveal

An IMEI check is powerful, but it is not a full inspection. It cannot tell you:

• Battery health. Check it on the device: Settings → Battery → Battery Health. Below 80% means a battery replacement is due — factor that into the price. Our trade-in vs sell guide shows how battery condition moves resale value.
• Physical condition or repair history. A clean IMEI says nothing about a replaced screen, a bent frame, or water damage. Inspect the phone in person, or ask for dated photos of every edge.
• Whether it was financed. An unpaid phone bill can land a phone on the blacklist, but financing alone does not show up as a field. A phone being paid off in installments can be blacklisted later if the seller stops paying — one more reason to buy from someone accountable.
• Proof of ownership. A clean IMEI is not proof the seller owns the phone. Ask for the original receipt or order confirmation.
• The future. A check is a snapshot. A seller can report the phone stolen after the sale and get it blacklisted. Buy in person, get a receipt with the IMEI written on it, and pay in a way that leaves a trail.

The 6 checks to run before you pay

Do these in order. Any failure is a reason to walk away — there are plenty of clean iPhones for sale.

1. Match the IMEI in three places. Settings → General → About, the box label, and the SIM tray (if it has one) must all show the same number. A mismatch means a swapped box, a swapped tray, or a counterfeit — all three mean no deal.
2. Run the free stolen-phone check. Enter the IMEI at the CTIA's Stolen Phone Checker (stolenphonechecker.org). It is free, backed by the GSMA's global blocklist, and limited to five queries per day for US consumers. A flagged result ends the deal immediately.
3. Confirm the carrier lock. On the phone: Settings → General → About → Carrier Lock. "No SIM restrictions" means unlocked. Cross-check it against the IMEI report — if the two disagree, trust neither and dig deeper. Our factory unlocked vs carrier locked explainer covers what each status means for resale value.
4. Confirm Activation Lock is OFF. Ask the seller to erase the phone in front of you (Settings → General → Transfer or Reset iPhone → Erase All Content and Settings) and take you to the Hello setup screen. If it asks for the previous owner's Apple ID at setup, the phone is still locked to them. A paid IMEI report also shows FMI on/off if you cannot be there in person.
5. Check warranty with the serial number. Take the serial from Settings → General → About and enter it at checkcoverage.apple.com. Apple's free tool confirms the exact model, the estimated purchase date, and whether the Limited Warranty or AppleCare is still active.
6. Run one full paid report. Free checks cover blacklist and warranty. For the complete picture — carrier, FMI, purchase country, refurbished/replaced flags — a paid report costs about $1–$5 and takes minutes. On a $400+ purchase, it is the cheapest insurance you will ever buy. Our imei.ae lookup runs exactly this check.

Free vs paid IMEI checks: what each costs

You do not need to pay for the basics, but the free tools each cover only one slice. Here is the honest breakdown.

Wholesale check credits trade for as little as $0.09–$0.35 per lookup, which is why traders check every phone they buy — at those prices there is no excuse not to. Retail buyers should budget $1–$5 for the one full report that matters: the one on the phone you are about to pay for.

6 red flags that mean walk away

1. The seller won't share the IMEI. The single biggest red flag in used-phone buying. A legitimate seller has nothing to lose by letting you check. "I don't want to share it for privacy" is not a real reason — the IMEI identifies the phone, not the owner.
2. The price is far below market. A "new" iPhone 17 Pro at half the going rate is either stolen, locked, or fake. Check current market pricing in our trade-in vs sell guide before you believe a miracle deal.
3. IMEI mismatch between box, tray, and Settings. See check #1 above. Any mismatch, any excuse, no deal.
4. "Clean IMEI" but Find My is still ON. A clean blacklist result does not mean the phone is usable. If the seller cannot or will not sign out of their Apple ID and erase the phone in front of you, it is still their phone.
5. No box, no receipt, no history. One missing item is normal. All three missing, plus a too-good price, is a pattern.
6. Pressure to pay fast, in cash, somewhere odd. "Someone else is coming at 6" is a sales tactic. A clean phone will still be clean tomorrow — and if it is not, you just dodged a problem.

What to do if you already bought a blacklisted iPhone

First, stop and don't panic — and don't try to "fix" it with a shady unlock service. Your options depend on how you bought it:

• Bought from a store or marketplace with buyer protection: file a claim immediately with the IMEI, your receipt, and the blacklist result. eBay, Swappa, and Back Market all cover "not as described" and blacklisted devices.
• Bought privately: contact the seller in writing and ask for a refund. If they refuse, your receipt with the IMEI on it is your evidence for a police report and any small-claims filing.
• Already reported it yourself: if you reported your own phone lost or stolen and later found it, call your carrier — they can usually clear the block, but only the carrier or account holder who reported it can lift it.
• Activation Lock, not blacklist: only the previous owner can remove it (Apple ID sign-out or a removal request at iCloud.com/find). Apple will not remove it for you without proof of purchase showing you as the buyer.

A blacklisted iPhone is not completely useless — it can still work on Wi-Fi as a media device — but it will never reliably work as a phone again on carrier networks. That is why the check comes before the payment, not after.

FAQ

Is an IMEI check free?

The essential checks are free: the CTIA Stolen Phone Checker for blacklist status, Apple's coverage tool for warranty, and the on-device Settings checks for carrier lock and battery health. A full paid report with carrier, FMI, and purchase-country data costs about $1–$5 per device.

Can an IMEI check tell me if an iPhone is unlocked?

Yes — a carrier/SIM-lock IMEI report shows whether the phone is locked and which carrier it is tied to. You can also check on the phone itself: Settings → General → About → Carrier Lock. "No SIM restrictions" means unlocked.

What does a clean IMEI mean?

Clean means no carrier has reported the phone lost, stolen, or tied to unpaid bills in the databases checked. It does not guarantee the phone is unlocked, that Activation Lock is off, or that the battery is healthy — those need their own checks.

Can a clean IMEI turn bad after I buy the phone?

Yes. If the seller reports the phone stolen after the sale — or stops paying the installments on it — the carrier can blacklist it later. That is why you buy in person, get a receipt with the IMEI written on it, and pay in a way that leaves a trail.

Is it safe to give someone my IMEI?

Sharing it with a serious buyer or a reputable check service is normal and necessary. Posting it publicly is not — scammers can use a posted IMEI to file false reports or clone it. Share it privately, only when there is a real deal on the table.

Bottom line: the IMEI check takes two minutes and costs nothing for the basics. Run it before every used-iPhone purchase — then check the battery, the lock, and the seller with the same care. Buying used is smart. Buying blind is not.