Can a free IMEI check tell me if a phone is stolen?

Usually not. Most free checks only read the model from the first eight digits. Lost and stolen reports sit in separate databases that cost money to search, so a site that shows them for free is either limited in some way or will ask you to pay at the end.

Can I check Activation Lock with an IMEI?

Not through Apple, which stopped offering a public checker in 2017. Some paid services can read Activation Lock from the records they have access to. If you have the iPhone in your hands, the setup test in our guide to checking a used iPhone is more reliable.

Why does my IMEI check say “invalid”?

The most common reason is a typing mistake, such as a 6 read as an 8. The last digit is a check digit, so one wrong number makes the whole thing fail. Check it again from Settings or by typing the keypad code. If it still fails, the number may have been copied from the wrong place, for example a serial number.

My phone has two IMEI numbers. Which one do I use?

Either works for most checks, but use the first one, often labelled IMEI 1. Phones that take two SIM cards have one number for each.

Can someone unlock or clone my phone with just the IMEI?

Knowing the number on its own doesn’t let anyone into your phone, your accounts or your money. It’s an identity number for the hardware. Still, keep it off public posts alongside your name, the same as you would with a serial number.

Does an IMEI check show who owns the phone?

No. The records we and others check don’t name the owner. They show the model, whether a lock is on, and whether the phone has been reported, but not whose it is.

Guide

What an IMEI check can and can’t tell you

What the 15 digits identify, what a free check really shows, and which records need a paid lookup.

6 minute read Facts checked 11 October 2026

Search for an IMEI check and you’ll find dozens of sites offering one for free. Some of them are useful. Many tell you far less than they seem to, and the part you actually wanted ends with a price at the bottom.

This guide explains what the number is, what any check can honestly tell you from it, and which answers have to come from paid records. That way you can judge any result you’re given, including ours.

What the 15 digits are

IMEI stands for International Mobile Equipment Identity. Every phone that connects to a mobile network has one, and it’s different for every handset. Networks use it to recognise the phone, separately from the SIM card inside it.

The number isn’t random. It has three parts:

The first eight digits are the Type Allocation Code, or TAC. It identifies the maker and the model, so every phone of the same model and version shares it.
The next six digits are the handset’s own serial, which makes your phone different from every other one of that model.
The last digit is a check digit, worked out from the other fourteen. If one digit is typed wrongly, the sum no longer adds up, which is how a website can tell straight away that a number is mistyped.

If you haven’t found your IMEI yet, our step-by-step guide to finding it covers working phones, locked phones and phones that won’t turn on.

Numbers that look similar

Phones show several identity numbers, and it’s easy to copy the wrong one.

IMEI 1 and IMEI 2. Phones that take two SIM cards, including many with an eSIM, have one IMEI for each. Use the first.
IMEISV. This is 16 digits long and adds a software version to the end. It isn’t the number a check needs.
MEID. A 14-character number used by some older networks in the US. On many phones it’s simply the IMEI without its last digit.
Serial number. A mix of letters and numbers set by the manufacturer. Useful for warranty, but it isn’t an IMEI.

What a free check can tell you

From the number alone, with no paid records, a check can do two things well.

Confirm the number is real

The check digit catches typing mistakes. If the number passes, it was at least copied correctly and is shaped like a genuine IMEI.
Tell you the model

The TAC in the first eight digits can be matched to a make and model. If the seller says it’s one phone and the check says another, that’s worth asking about.

That’s useful, and it’s free for a reason: the list of TACs is widely available. It doesn’t tell you anything about the history of this particular phone.

This is where many “free IMEI check” sites lead you on. They show the model for free, then ask you to pay to see whether the phone is locked or reported. There’s nothing wrong with charging for those records, but it helps to know which part is which before you start.

What needs a paid lookup

Anything about the phone’s history lives in records held by networks, phone makers and industry bodies. Services that search them pay for each search, so these answers rarely come free.

What you want to know	Free check	Paid check
Is the number typed correctly?	Yes	Yes
Make and model	Yes	Yes
Reported lost or stolen	Rarely	Yes
Locked to one network, and which	No	Usually
Activation Lock (iPhone)	No	Usually
Payment-plan or company locks	No	Sometimes
Warranty and purchase date	No	Sometimes

Lost and stolen reports are the ones most people care about. When a phone is reported, its network can add the IMEI to a shared list so other networks block it too. Our guide on buying a phone that turns out to be blacklisted explains what that means for you.

Network locks matter if a phone says “SIM not supported” with your card in it. Our guide to telling whether a phone is unlocked covers that in more detail.

Why a clean result isn’t a promise

Every paid check reads records that someone else keeps, and those records have gaps.

A report can be added after you check. A phone that’s clean today could be reported tomorrow if it was taken from someone who hasn’t noticed yet.
Not every network, or every country, shares its reports on the same lists, so a phone blocked in one place may look clean elsewhere.
Some records are updated in batches, so a change can take time to show up.

Read every result as “on the day we checked”

A good check tells you what the records said at that moment, and says so. Be wary of anyone who calls a result guaranteed, or promises a phone will never be blocked.

When a check is worth doing

You don’t need to check a phone you bought new from a shop and have used ever since. A check earns its keep in a few situations:

You’re about to buy a second-hand phone, especially from someone you don’t know. Check before you hand over any money, not after.
A phone shows “SIM not supported”, “No service” or “Invalid SIM” and you want to know whether it’s locked to a network or blocked.
A phone you’ve reset is asking for someone else’s account and you want to know exactly which lock it is.

If you’re buying an iPhone, an IMEI check is one part of it. Our guide to checking a used iPhone before you buy shows the free checks to do with the phone in your hand.

Is it safe to share your IMEI?

Giving your IMEI to a seller, a network or a checking service is generally low-risk. On its own it doesn’t give anyone access to your phone, your accounts or your money.

It’s still sensible to keep it off public posts and listings alongside your name. Share it with the person or service that needs it, and no further.

What our check covers

To be clear about our own service: we don’t offer a free full check. Typing an IMEI into our box tells you straight away whether the number is valid, and that part is free. The full diagnosis is a paid check.

For $9.99, it looks at which lock is on the phone, whether it’s been reported lost or stolen, which network it’s tied to and exactly which model it is. You get the results straight away, on screen and by email, written in plain English. If we find a lock we can help with, we tell you what the fix costs, and you decide whether to go ahead.

You can start a check here, or find your IMEI first if you need to.