We still think about this the way we did in 2005: a stolen phone means a device to replace, a financial annoyance, an insurance claim to file. That reading is now simply wrong. What leaves with the device isn't a few hundred euros' worth of hardware, it's an active SIM card, a messaging inbox that receives your banking verification codes, apps that are sometimes already signed in, and a phone number that today serves as digital ID for a good chunk of your administrative life.
To put it plainly: the thief didn't steal your phone. They stole your second authentication factor. And they often understand that better than you do.
Cybermalveillance.gouv.fr and the French Ministry of the Interior regularly point out that the critical window falls within the very first hours. Beyond that point, it's no longer a loss — it can become identity theft. Here's how to get through that window cleanly — and how to prepare, because most of what matters happens before the incident.
What your SIM card actually holds
Two things get constantly confused and need separating: the device and the line.
The device is the hardware. If it's locked with a PIN, a pattern, a fingerprint or face recognition, its contents are reasonably protected on recent models, whose storage is encrypted by default. An ordinary thief — the kind who resells on the quiet — will simply factory-reset it and put it back on the market.
The line is another matter entirely. The SIM card is protected only by the PIN code — the one plenty of people have disabled because it's "annoying at startup". If the PIN is switched off, all it takes is pulling the SIM out of the stolen phone and slipping it into any handset at all, including a ten-euro button phone, to receive every text message you get. All of them. Including those from your bank, your carrier, your online accounts, government services.
That's where the theft changes nature. An attacker receiving your texts can launch "forgotten password" procedures on your accounts and intercept the code that gets sent. Most consumer services still use SMS as a recovery method. The phone is no longer the object of the theft, it's the tool for the next one.
The top priority reflex, then, isn't to block the device. It's to suspend the line. A blocked phone with an active SIM is still a disaster; a suspended SIM in an active phone is just a piece of lost property.
The first six hours: order matters
The classic mistake is starting at the police station, spending an hour and a half there, and only then contacting your carrier. Do it the other way round.
1. Suspend the line with your carrier
This is step number one, and you can do it from any phone: a friend's, a landline, a shop's front desk. Every French carrier operates an emergency service reachable 24/7 for line suspension, plus an online account area where you can do it yourself if you can manage to log in from a computer.
Explicitly ask for the line to be suspended, not terminated. Suspension freezes calls, texts and data while keeping your number. If the device turns up, the line is reactivated within minutes. If you need to start over with a new card, your carrier will send one that keeps the same number.
2. Block the device via its IMEI
The IMEI is the unique 15-digit serial number of every phone. On request, your carrier can add that identifier to a national blacklist: the device becomes unusable on French networks, whatever SIM card is inserted.
That does mean knowing the number. You'd normally get it by dialling *#06# on the phone's keypad — which assumes you still have it in your hand. Hence the importance of noting it down in advance: it appears on the original box, on the purchase invoice, and in settings ("About this device"). Photograph it, write it on a piece of paper kept with your important documents or in a small paper address book stored at home. It's the one piece of information in the whole file that you won't be able to retrieve after the fact.
3. Lock and locate remotely
Both Android and iOS offer a remote location and locking service, accessible from a browser: "Find My" on Apple, "Find My Device" on Google. These tools let you make the device ring, show it on a map, put it into lost mode with a message on screen, and as a last resort wipe its contents remotely.
One piece of advice: don't wipe it straight away. Lost mode is enough at first and preserves the ability to locate the phone. Wiping severs the link for good. Save it for the moment you're certain you won't get the device back.
And an important warning: never go and retrieve a located phone from a stranger yourself. The gendarmerie repeats this after every news story on the subject. You pass the location on to law enforcement; you don't go there.
4. Alert your bank
Even without a banking app installed, your number is probably used to validate online payments via SMS code. Call your bank's card-blocking service, report the situation, and ask for SMS validation to be temporarily suspended or switched to another channel.
If you use contactless payment through your phone, also block the associated virtual card.
5. File a report, or declare the loss
In the event of theft, you can file a complaint at any police station or gendarmerie brigade, or submit a pre-complaint online on the Ministry of the Interior's website to save time when you get there. For a simple loss, a loss declaration is enough.
This document isn't a formality: your insurer will ask for it, and it protects you if your line is used for criminal purposes after the theft.
6. Change your critical passwords
From a computer, not from someone else's borrowed phone: your main email account first (it's the keystone, the one that lets you reset everything else), then bank accounts, then social media and government portals.
The wave of text messages that follows
There's a phenomenon few victims see coming: a few days after the theft, the fraudulent texts start pouring in.
Two explanations. The first is mundane: your number was already circulating and coincidence did the rest. The second is more targeted. Sellers of stolen devices know the victim is in a particular state of mind — waiting for news, having filed a complaint, hoping for a miracle. That's fertile ground for a message along the lines of "Your iPhone has been located, log in here to recover it".
These messages imitate Apple or Google sign-in pages with unsettling realism. The goal is to obtain your ID and password in order to disable activation lock, turning a blocked, unsellable device into one that can be resold at full price.
Absolute rule: Apple and Google will never send you a text with a link to log into your account. You check a device's location only by typing the service's address into your browser yourself. If you receive a message like that, forward it to 33700, France's national reporting service for unwanted text messages, then delete it.
The same reasoning applies to calls: an "adviser" asking for your Apple ID or a code received by text is a scammer, no exceptions.
Getting prepared: the fifteen minutes that save weeks
Everything above becomes infinitely simpler if three things have been done beforehand. They take a quarter of an hour.
Re-enable your SIM card's PIN code. This is the highest-return and most neglected step. In your phone's settings, under security or "SIM card lock", turn on the PIN request at startup and change the default code (often 0000 or 1234). The result: a SIM pulled from a stolen phone is useless without that code. You only type it in on restart, a few times a year.
Write down the IMEI and keep it outside the phone. See above. A photo of the box will do, provided it's stored somewhere other than the device in question.
Back up regularly. Photos, contacts, documents. A backup to your system's cloud is enough for most uses, but an external hard drive for backups plugged into your computer once a month remains the most robust solution, and the only one that doesn't depend on an online account you might, precisely, no longer be able to open.
A fourth point deserves a mention: reducing the likelihood of the theft in the first place. That's not paranoia, it's statistics. Snatch thefts target phones held in the hand on the street, taken out on public transport, left on a café table. A phone neck strap or a case with a lanyard genuinely makes a difference when travelling or at festivals, and a simple belt pouch keeps the phone out of your back pocket — the undisputed champion of pickpocket targets.
The particular case of older people and relatives you help out
For an elderly person, losing a phone is a double blow: the loss of contact with family, and the sudden impossibility of completing the online steps needed to fix the situation. Without their phone, they can't receive the access code for their carrier's account area, can't validate a banking operation, and sometimes can't even find their child's number.
A few simple arrangements prevent the spiral:
- Write the essential numbers (close family, doctor, bank, carrier) on a paper card kept in the wallet, independently of the phone.
- Keep a spare large-button mobile phone, not connected to anything, with a prepaid card: it allows emergency calls during the days of uncertainty.
- Note the SIM PIN and the IMEI in the same paper file as identity documents, at the person's home or at a designated relative's.
- Agree in advance on who calls whom if there's a problem. Someone disoriented who doesn't know who to turn to is exactly the profile fake telephone advisers are looking for.
On that last point, a reminder that applies to everyone: it's never up to you to call a number sent by text. You only call back numbers printed on the back of your bank card, on your carrier's invoice, or on the official website typed in by hand.
Summary: the checklist to print out
| Timing | Action | Who to contact |
|---|---|---|
| Immediately | Suspend the line | Carrier customer service, 24/7 |
| Immediately | Lock remotely (lost mode) | Apple or Google account, from a browser |
| Within the hour | IMEI blocking | Carrier (number noted in advance) |
| Within the hour | Block your payment methods | Bank's card-blocking service |
| Within 24 hours | Complaint or loss declaration | Police station, gendarmerie, online pre-complaint |
| Within 24 hours | Change your passwords | From a computer, email account first |
| Following days | Ignore and report "device located" texts | 33700 |
Keep this list somewhere other than on your phone: printed out in a drawer, or in the notebook where the IMEI and important numbers are already written down.
And in the meantime, how do you let people know?
This is the practical detail everyone discovers at the worst possible moment: your line is suspended, your new device won't arrive for several days, and nobody understands why you've stopped answering. Family worries, and tomorrow's work meeting hasn't been warned.
An online SMS-sending service used from a computer does exactly that: it lets you notify a few people in seconds, with no working mobile line, no account to create, from any browser — a family computer, a public library, an office. A short, factual message: "Phone stolen yesterday, line suspended, I'll reply by email in the meantime."
It's also, incidentally, a good way to cut the ground from under any scammer who might exploit your situation. When your family knows you no longer have a line, a message saying "it's me, I've changed number, can you lend me some money?" instantly loses all credibility.
Key takeaways
Losing a phone is no longer a problem about an object, it's a problem about identity. The order of actions follows from that: the line first, the device next, the accounts in parallel, and the complaint to secure your legal position.
And the best protection is still the one that costs nothing: an active PIN on the SIM card, an IMEI written down somewhere, an up-to-date backup. Three habits that turn a catastrophe into an inconvenience.
Useful sources and resources: Cybermalveillance.gouv.fr (quick-reference sheets on theft and identity fraud), service-public.fr (declaring a lost or stolen phone), 33700 (reporting unwanted texts and calls), the Ministry of the Interior's online pre-complaint service.
