eSIM and Number Portability in 2026: Switch Carriers in 3 Minutes — What Operators Don't Tell You

Introduction: the last obstacle has just fallen

For twenty years, switching mobile carriers in France involved an unchanging ritual: call 3179, jot down an interminable code, sign up elsewhere, then wait three to five days for a cardboard envelope to land in the letterbox. That postal delay, purely logistical, was long the incumbents' best ally: the greater the inertia, the less likely a subscriber was to move.

In 2026, that lock has been broken. The eSIM — the chip soldered directly into the handset and provisioned remotely — is now offered by Orange, SFR, Bouygues Telecom and Free Mobile, as well as by most of their low-cost brands. Switching carriers now takes a matter of minutes: no postman, no shop, often without even getting off the sofa. On paper, it's a clear win for consumers, entirely in line with what Arcep has been pushing for years: making the market more fluid to keep competitive pressure high.

Except that this apparent simplicity conceals an administrative machinery still governed by strict legal deadlines, poorly documented edge cases and a new category of fraud: eSIM swapping. This guide walks through the entire procedure, in the order it actually unfolds.

What the eSIM changes in practice

An eSIM (embedded SIM) is not a miniaturised physical card: it is a secure component built into the phone's motherboard, capable of hosting one or several carrier "profiles" downloaded over the internet. The standard is defined by the GSMA, the organisation that brings together mobile operators worldwide.

There are three practical consequences:

• No more waiting for delivery. The profile is activated via QR code or, since recent versions of iOS and Android, by a simple direct transfer between two devices.
• Native multi-profile support. A recent smartphone commonly handles two active profiles simultaneously and around ten stored profiles. You can therefore keep your main French line and add a local line while travelling.
• The end of formats. Nano, micro, mini: the headache of choosing the right cut-out disappears. That said, if you are still juggling an old phone and a new one, a multi-format SIM card adapter remains the backup accessory that saves plenty of cold sweats.

Not all phones are equal

The eSIM has been available on iPhones since the XS, on most recent Galaxy S and Pixel models, and on a growing share of mid-range handsets. However, some entry-level models and many phones imported from outside the European Union lack it, or block provisioning. Before starting anything, check your settings for an "Add eSIM plan" entry — or dial *#06#: the presence of a 32-digit EID identifier confirms the module is indeed there.

The RIO code: still the keystone

The eSIM speeds up profile delivery, but it does not replace number portability, which remains a procedure framed by the French Postal and Electronic Communications Code and overseen by Arcep.

The RIO (Relevé d'Identité Opérateur, or carrier line identity statement) is a unique twelve-character code identifying your line. It can be obtained free of charge:

Method	Details	Timing
Call 3179	Free voice server, code read out then sent by SMS	Immediate
SMS to 3179	Send an empty message or one containing "RIO"	A few seconds
Customer account	"My line" or "Cancellation" section	Immediate

Three points advisers often forget to mention:

1. The RIO is specific to each line. On a multi-line family plan, every number has its own.
2. It has a limited validity period in practice: most carriers regenerate it after a change of account holder or contract. Request it on the very day you sign up.
3. Requesting your RIO cancels nothing. Many subscribers hesitate for fear of cutting off their line: calling 3179 is purely informational.

The legal deadline, unchanged despite the eSIM

This is the point marketing communications happily gloss over. The number is actually ported within a minimum of one business day, and no later than ten days after the request, unless the subscriber expressly asks for a postponement. The eSIM eliminates postal shipping time, not inter-carrier processing time.

In practice, the switchover very often happens the following business morning, between 8am and 1pm. Service interruption itself is measured in minutes — the time it takes for the old profile to deactivate and the new one to take over on the network.

The step-by-step procedure, without nasty surprises

1. Prepare the ground

Before clicking "subscribe", take stock of everything tied to your line:

• SMS-based two-factor authentication for your bank, your email accounts, your public services. A few hours of downtime at the wrong moment can lock you out of a critical account. Where possible, switch to an authenticator app or, better still, to a physical FIDO2 security key that makes access independent of the mobile network.
• Subscriptions billed via your carrier invoice (certain streaming or press services). They are not transferred and must be cancelled separately.
• Rolled-over data balances and one-off add-ons, lost upon cancellation.
• Any phone unlocking. Since 2020, handsets sold in France ship SIM-unlocked, but a device bought abroad or second-hand may still be locked.

2. Back up what lives on the line

Contacts, call logs and messages are not stored on the eSIM: they live in the phone and in the cloud account. Exporting your contacts to vCard format beforehand, along with a full backup, prevents a lot of regret. For those who prefer not to entrust anything to the cloud, a compact external SSD does the job very well and makes the backup repeatable every time you change device.

3. Sign up with the new carrier

When placing your order, explicitly choose the eSIM option (it is not always ticked by default) and provide:

• the number to be ported;
• the RIO code;
• the exact account holder of the line — surname, first name and, for a business, company name and SIRET number.

The leading cause of failed portability is a mismatch in the account holder's name. A line under a maiden name, a surname/first-name inversion, an account taken out by a spouse: automatic matching fails and the request is rejected. Check the exact wording on your latest invoice.