How to Report a Stolen Phone in the UK

Who blocks the IMEI in the United Kingdom, what the police step is for, how long it takes, and how to reverse it if the phone comes back.

The UK has the tidiest process of the big markets: one call to your network blocks the handset across all of them, and one call to the police produces the crime reference number that insurers, employers and banks will ask for. Doing both within the first hour is the whole job.

The distinction that decides everything here is the one between the SIM and the handset. Barring the SIM protects your number and your bill; blocking the IMEI is what makes the physical phone refuse to work at all. A thief drops in a new card within the hour, so the second request is the one that actually costs them something — and it is the one operators most often skip unless you name it.

The five steps, in order

1. Secure the accounts first
   Before anything else, sign out of your accounts remotely, freeze any banking or wallet app tied to the number, and change the passwords for anything that sends verification codes to the stolen phone. The handset is replaceable; an account with codes arriving on it is the expensive part.
2. Find the IMEI
   The block request needs the 15-digit IMEI, and you cannot dial *#06# on a phone you no longer have. It is printed on the original box barcode, shown in your account page with the operator that sold the device, and stored in your Google or Apple account under the device list. Find it before you call.
3. Report it to your network operator, with the police in parallel
   In the United Kingdom the block is placed by your network operator, with the police in parallel, which registers the handset in the national blocking database UK networks share, so a block placed by one operator propagates to the others. Ask explicitly for the device to be blocked, not only the SIM barred — they are separate actions and the second one alone leaves the phone perfectly usable with a new card.
4. File the police report
   Then file a report to the police on 101 or through the force's online form, which produces the crime reference number you will be asked for repeatedly. Keep the reference somewhere that is not on the stolen phone: insurers, banks and employers will all ask for it, and so will the operator if you later need to prove the report was yours.
5. Confirm, and keep the paperwork
   Blocking takes effect typically within 24 to 48 hours across all UK networks once the operator has logged the IMEI. Re-check the IMEI yourself a day or two later to confirm the flag has landed rather than trusting the promise, and keep every reference number: if the phone is recovered, the network that blocked it can lift the block if the handset is recovered and you ask them to.

What is specific to the UK

Register the IMEI on the national property register before anything happens, not after. UK police routinely check recovered property against it, and a phone listed there stands a genuinely better chance of finding its way home than one that only exists on a crime report. Second-hand buyers in the UK also have access to paid provenance checks that read the same data, which is why a blocked handset is very hard to sell on here.

What a block does, and what it does not do

A blocked IMEI is refused registration on the networks that honour the national blocking database UK networks share, so a block placed by one operator propagates to the others. The handset still powers on, still works on Wi-Fi and still holds whatever was on it — which is why remote wiping is a separate action you should take through your device account, not something the block does for you.

It also does not recover the phone. What a block does is destroy the resale value, which is the motive behind most phone theft in the first place — and it makes the handset traceable when someone eventually tries to check it before buying. Reporting is therefore worth doing even when you have written the phone off.