L'équipe Texto SMS Gratuit
31 August 2026 · 12 min read
Introduction: back-to-school, the moment we sign too fast
Every late August, mobile carrier stores see the same scene play out. A parent, a child starting middle school or high school, and a question asked backwards: "which plan would you recommend?" Twenty minutes later, the contract is signed, the SIM activated, and the phone switched on in the parking lot.
The problem is almost never the plan itself. Offers at €2, €5 or €10 a month are plentiful and, broadly speaking, honest in 2026. The problem lies in the three or four settings nobody opened during those twenty minutes: who is legally responsible for the line, what happens if the child dials a premium-rate number, what is actually blocked when the plan's allowance runs out, and what remains accessible on the device once parental controls have been "switched on."
This guide starts from a simple principle: you don't equip a child the way you equip yourself. The selection criteria are different, so are the financial risks, and the trade-off between freedom and supervision is a subject in its own right. Here, point by point, is what genuinely deserves your attention — and what is just commercial noise.
The legal point 90% of parents overlook
Let's start with what shapes everything else: a minor cannot take out a mobile phone contract in their own name. A subscription contract is a commitment that creates a lasting financial obligation; it falls under parental authority. In practice, your child's line is therefore your line, taken out in your name, with your bank details.
This has three concrete consequences.
You are the sole debtor. Any usage beyond the plan, any purchase approved through the carrier bill, any premium-rate number dialled from that line will be debited from your account. There is no remedy that consists of saying "it was my son who called." The contract holder pays.
You are the only legitimate point of contact. Your child will not be able to cancel, change the plan, request a porting code, or ask for a replacement SIM. That's an advantage: it prevents impulsive plan changes and chain-reaction cancellations in the schoolyard.
You have access to the itemised bill. Depending on the carrier, usage details (numbers called, timestamps, data volumes) are available in your online account. It's a valuable tool — but also an ethical question we'll come back to below.
Worth remembering: from around age 16, some carriers offer "youth" plans with a dedicated online account for the minor user. The contract remains in the parent's name; only day-to-day management is delegated.
The real financial danger: premium-rate numbers and carrier billing
Contrary to popular belief, the spending item that spirals is almost never data. A capped plan that cuts off at 20 GB really does cut off. What goes off the rails are two mechanisms most parents don't know about.
Premium-rate services (SVA)
Numbers beginning with 08, along with short four- or five-digit numbers, are billed on top of the plan, sometimes at several euros a minute or several euros per text message sent. A prize competition spotted on a video platform, a dubious "unlocking" service, a vote for a TV show: a few taps are enough to rack up tens of euros.
The good news: blocking premium-rate services is free and mandatory at every French carrier. It sits in your online account, often under a heading such as "call restrictions" or "premium-rate number blocking." On some plans, you have to call customer service to activate it. It is, without question, the very first setting to apply once the line is up and running.
Purchases charged to the carrier bill
Carrier billing lets users buy content (games, subscriptions, virtual currencies) that is then charged through the mobile operator. The mechanism is legitimate, but it completely bypasses oversight of the family bank card. Here too, it can be disabled in your online account, usually under "carrier billing" or "purchases and entertainment."
These two blocks, set up in ten minutes, eliminate the overwhelming majority of nasty surprises. Arcep, in its regular work on premium-rate services and consumer protection, points out that these restrictions must be available free of charge and without conditions.
Capped plan, prepaid or standard: the real hierarchy
Three families of offers coexist, and they are not equally suited to every age.
| Type of plan | What happens when the credit runs out | Who it's for |
|---|---|---|
| Prepaid (top-up card) | Everything stops, except emergency calls | Ages 8–11, first phone |
| Capped plan | Data cut off, calls/texts cut off depending on the offer, no out-of-plan usage | Ages 11–15, middle school |
| Standard plan | Usage continues and is billed as an extra | Ages 16 and up, with a conversation |
Prepaid has one huge educational advantage: the child watches the credit go down. It has one real drawback: topping up is time-consuming and often more expensive per gigabyte. The capped plan is the dominant compromise in 2026 — full financial protection, controlled cost, nothing to do each month.
Watch out for one nuance: "capped" doesn't mean the same thing everywhere. With some carriers, data speed is throttled rather than cut off; with others, calls to mobiles remain possible beyond the allowance. Read the standardised information sheet, the document every carrier must provide before you sign up, summarising the offer's essential terms.
How much data do you actually need?
This is where marketing does the most damage. Plans with 100, 200 or 300 GB are sold as the norm, whereas a middle-schooler's usage most often falls between 5 and 30 GB a month, once home Wi-Fi and school Wi-Fi are factored in.
Three useful benchmarks:
- Messaging and text-based social media: roughly 1 to 3 GB per month.
- Music streaming off Wi-Fi: 1 GB for around 15 to 20 hours at standard quality.
- Short vertical video: this is the item that blows everything up — 1 GB for roughly one hour in high definition.
In other words, a teenager's consumption depends almost entirely on their relationship with video. A 20 GB plan is more than enough for reasonable use; moving up to 100 GB "does no harm" but often costs €5 to €8 more per month, i.e. €60 to €96 a year for data that is never used.
A highly effective trick: rather than buying volume, shore up the home Wi-Fi. A well-placed mesh Wi-Fi extender in an upstairs bedroom saves more data than a change of plan, while improving connection quality for homework.
Parental controls: what's mandatory, what's effective
Under the French law of 2 March 2022 known as the "loi Studer," now fully in force, every connected device sold in France must offer a parental control feature installed by default, which can be activated free of charge at first setup. That's a real step forward, but it creates a false sense of security.
Three levels need to be distinguished, and they don't cover the same ground.
Level 1 — The carrier's parental controls
These act on the mobile network: filtering of website categories, sometimes time-based restrictions on data. Their weakness is structural: they don't apply when the child is on Wi-Fi. At a friend's house, in a fast-food restaurant, on the school network, the carrier filter is blind.
Level 2 — The operating system's parental controls
The tools built into Android and iOS (screen time, age restrictions, download approvals, time windows) are considerably more robust, because they apply to the device whatever the network. This is the level that matters most, and it's also the one the fewest parents actually configure beyond the first five minutes.
Level 3 — Filtering at the router
Setting up filtering on the home router protects every device in the house, including consoles and tablets. That requires a router that supports it or a Wi-Fi router with dedicated parental controls, with the advantage of no longer depending on each device's settings.
None of these three levels is sufficient on its own. Level 2 is the backbone; levels 1 and 3 are reinforcements. And none of them replaces a conversation.
The official government site jeprotegemonenfant.gouv.fr offers up-to-date setup tutorials for every system and every carrier. It's the reference resource, free and with no commercial agenda.
The phone: new, refurbished or handed down?
Kitting out a child with a €900 device is rarely a good idea: high breakage rates, risk of theft outside school, and needless social pressure. Three sensible routes.
The hand-me-down. The smartphone you're replacing. Zero cost, but check that the model still receives security updates — a phone that is no longer supported becomes a risk, not a saving.
Refurbished. The French market is mature and regulated. Check VoLTE compatibility and frequency bands, a subject we covered in detail in an earlier guide. Always budget for a reinforced protective case: in a school setting, it pays for itself at the first drop.
The simplified phone. For ages 8–11, a basic push-button phone, able to make calls and send texts with no browser or apps, remains a highly relevant option. It meets the real need — reaching the child, being reachable — without opening the door to social media three years too early. Some models add simple location tracking, with no app ecosystem attached.
In every case, a spare USB-C wall charger for the school bag avoids panicked calls at 5 p.m. because the battery is flat.
eSIM: simplify or complicate?
In 2026, eSIM is available from every national carrier and on almost all recent smartphones. For a child's line, it offers two advantages and one pitfall.
Advantage 1: the line can't be lost. No SIM tray, no micro-card mislaid in a gym bag.
Advantage 2: remote activation. If the device changes, the transfer is done from your online account, with no trip to a store.
The pitfall: on a device that accepts several profiles, a technically resourceful teenager can add a second eSIM — for example a prepaid offer from an alternative carrier or a data plan bought online — completely invisible on your bill. This workaround exists and it's trivial to pull off. On most devices, system restrictions let you prevent new cellular profiles from being added: that's a setting worth knowing about.
If the device still uses a physical SIM, keep the SIM tray tool and the original adapter in a labelled pouch at home rather than in the bag.
The real budget: what it actually costs over a year
Let's do the maths honestly, for a middle-schooler in 2026.
| Item | Annual range |
|---|---|
| 20 GB capped plan | €24 to €120 |
| Refurbished phone amortised over 3 years | €40 to €80 |
| Protection (case, tempered glass) | €15 to €35 |
| Screen replacement/repair (realistic probability) | €0 to €120 |
| Realistic total | €80 to €350 |
The gap is enormous, and it hinges almost entirely on two decisions: the level of plan chosen and the quality of the physical protection. An unnecessary 200 GB plan plus a brand-new phone with no case is the €600 first-year scenario.
The most common mistakes
- Signing a 24-month contract with a subsidised phone. You pay for the handset twice, and you can no longer switch plans as usage evolves.
- Not activating premium-rate blocking. It's the number one cause of surprise bills on a child's line.
- Confusing parental controls with permanent surveillance. Continuously tracking a 15-year-old's location raises a question of trust that goes well beyond the technical, and it often backfires on the parent.
- Forgetting the emergency number. Make sure the child knows that 112 works even with no credit, no SIM, and a locked phone.
- Never reviewing the bill. A quarterly read-through of the itemised details is enough to spot drift before it gets expensive.
Setting the ground rules: the part that isn't technical
No setting replaces an explicit agreement. Converging recommendations from public health and education bodies — notably the work of Santé publique France on screens and adolescent sleep — insist on one specific point: the night. A phone that sleeps in the bedroom is the leading cause of fragmented sleep among 11- to 17-year-olds.
The simplest solution is also the oldest: a shared charging station in the living room, and a battery-powered alarm clock in the bedroom so that "I need my phone as an alarm" stops being an argument. That single move settles what three monitoring apps cannot.
Write the rules with your child rather than for them: times, places, what happens if limits are exceeded. Negotiated rules get respected; imposed rules get circumvented — and a teenager will always learn faster than you how to get around a filter.
In summary
A child's first mobile plan comes down to five steps, in this order:
- Take out a capped plan suited to real usage, with no lock-in contract.
- Immediately activate premium-rate number blocking and disable carrier billing.
- Configure the operating system's parental controls, not just the carrier's.
- Protect the device physically and check that it still receives security updates.
- Set explicit rules around timing, especially at night.
The rest — gigabytes, 5G, bundled streaming options — is a matter of comfort. In 2026, a properly connected child costs less than €10 a month. What costs a lot is whatever you didn't sort out on day one.
