IMEI Check: What Each Result Actually Means

An IMEI check does not return one answer. It returns three, and they have nothing to do with each other: carrier lock, blacklist status and Activation Lock. Most people read the first red flag they see, assume the phone is dead, and either walk away from a good deal or pay someone to fix the wrong problem.

Here is what each result actually means, in the order you should care about them.

How to check an IMEI

Dial *#06# on the phone. Fifteen digits come up — that is the IMEI, the device's serial number on any mobile network in the world. You will also find it in Settings, on the SIM tray of most iPhones, and on the box.

Copy those digits and run them. Our free IMEI check returns all three statuses separately, which is the whole point: you need to know which of the three you are dealing with before you spend a dollar.

The three results, and what to do with each

Carrier locked: the common one, and the one worth paying for

This is what most US phones are. AT&T, T-Mobile, Verizon, Cricket, Straight Talk and the rest subsidise the handset and keep it on their network for a set period. The phone is perfectly healthy — it is just tied to one company.

You can tell immediately: full signal on the original SIM, and a "SIM not supported" or "enter unlock code" message the moment you swap in another one.

A carrier unlock done by IMEI is written into the manufacturer database, not the handset. Nothing gets opened, nothing gets installed, and an iOS update does not undo it. What does vary is the carrier and model combination — each one has its own turnaround and its own success rate, which is why our unlock page lists them one by one instead of promising "any phone, any carrier".

Before you pay anyone: if the phone is yours, paid off, and past its contract term, your carrier has to unlock it free when you ask. Always start there. Paying only makes sense once they have told you no.

Blacklisted: the reason matters more than the status

A blacklisted IMEI is on a shared registry between carriers. The phone gets no signal at all, on any SIM. There is no code to enter — the network simply refuses it.

An IMEI lands there for two reasons that people constantly treat as one:

• Unpaid balance. Instalments left on the device, or a contract closed early. Nobody reported anything — there is money owed. The owner is still the owner.
• Reported lost or stolen. Someone told the carrier the phone was gone and the carrier blocked it on their say-so.

The first has a path, and it is a legitimate one: plenty of people finish paying and want to use the phone they own. The second does not. We do not unlock reported devices, full stop. That is not a pricing question or a technical one. That phone most likely belongs to someone else, and the report exists precisely so that taking it gets you nothing.

If a site offers to "clean" a reported IMEI, what they are selling is either a block that comes straight back or nothing at all. And if you bought the phone in good faith, your move is a refund from whoever sold it to you — not paying to paper over the record.

Activation Lock is not a blacklist

This is the expensive mistake, and it happens on used purchases. The phone powers on, looks immaculate, and the setup screen asks for the previous owner's Apple ID. That is Activation Lock, and it is tied to an Apple account, not to a carrier or a registry.

Without that password the device is a paperweight. No unlocking service resolves it, and anyone who says otherwise is lying to you. This one reason alone is why you run an IMEI check before you hand over cash for a used iPhone, not after.

What an IMEI check will not tell you

• Whether the screen or battery are original. That needs the phone in hand.
• Whether it has water damage. Same — the registry does not know.
• Who owns it right now. No public database exposes that, and any site claiming to look up an owner by IMEI is collecting your data, not giving you theirs.

Things that never work

• Free code generators. Unlock codes are issued against one specific IMEI. There is no public algorithm, and the sites claiming one make their money from the ads you watch while you wait.
• Unlock apps. No app installed on the phone can change a record living on a carrier's server.
• Changing the IMEI. It is a crime in the US and across Latin America, and it makes the device useless for anything legitimate afterwards.
• SIM interposer chips. They hold until the next update, and then you are back where you started with an opened phone.

The short version

Signal on one SIM but not another means carrier locked — fixable, permanent, worth paying for. No signal on any SIM means blacklisted, and the only question that matters is whether it got there through debt or through a report. A password prompt at setup means Activation Lock, and the IMEI has nothing to do with it. Run the IMEI check first, then decide. Three very different problems, three very different bills — and one of them we do not bill for, because we do not do it.

Frequently asked questions