Getting connected is one of the first jobs after you land — and one of the few that quietly blocks everything else. Spanish banks, town halls, insurers and delivery drivers all want a Spanish mobile number, and most want to send an SMS code to prove it. This guide covers what you need to buy a SIM, the practical gap between prepaid and a monthly contract, how eSIMs solve the arrival problem, porting a number, what to check before signing for home fibre, and your rights if it goes wrong.
Most people expect the phone to be a small errand somewhere below finding a flat and above buying a kettle. In practice it sits near the top, because so much Spanish administration assumes you already have a local number. Appointment systems text a confirmation code, banks send a one-time password to authorise a transfer, and your town hall, gestor, landlord and the courier delivering your residency card all expect a number beginning +34.
Foreign numbers work for calls but fall over in exactly the places you need them most: plenty of Spanish systems either reject a non-Spanish number in the phone field entirely, or accept it and then fail to deliver the verification SMS. The practical consequence is a mild ordering problem that catches out almost every new arrival:
The way through it is less dramatic than it sounds: start with something that needs no paperwork. A prepaid SIM, or an eSIM bought before you fly, gives you a working Spanish or roaming number within minutes, which unblocks the bank, which unblocks the direct debit, which unblocks the monthly contract and the home fibre. You are not choosing your permanent setup on day one — you are buying yourself the ability to do the rest of the admin.
The companion guides on NIE vs TIE, empadronamiento and the padrón and opening a Spanish bank account cover the other corners of the same puzzle.
If you have bought a prepaid SIM elsewhere in Europe you may be surprised to be asked for identification for what feels like a twenty-euro purchase. This is not the shop being difficult. Spanish law requires mobile operators selling prepaid services to keep a register recording who bought the card.
The relevant provision is the single additional provision of Ley 25/2007, which states that operators marketing services activated by prepaid card “deberán llevar un libro-registro en el que conste la identidad de los clientes” — they must keep a register recording the identity of the customers who buy one. The register records the buyer's name, surname, nationality and the type and number of the identity document shown, and the operator has to tell the buyer that the register exists.
Source: BOE — Ley 25/2007, de 18 de octubre, disposición adicional única.
In practice, expect to show a passport (or an EU national identity card) whenever you buy and activate a Spanish SIM, including a cheap prepaid one from a supermarket. Bring the physical document, not a photo. Registration happens at the counter, or during activation if you buy online.
What the law does not say is that you need an NIE for a prepaid card. The requirement is identification, and a passport is an identity document. That distinction is the most useful thing to understand before you go shopping, and it is why prepaid works on day one when a contract does not.
Spanish mobile service comes in two broad shapes, and the difference that matters to a newcomer is not price or data allowance. It is what paperwork each one demands.
A prepaid SIM is bought outright and topped up as you go, with no ongoing billing relationship. Because there is nothing to bill, the operator generally does not need a Spanish bank account or a residency document — only the identification the register requires. That makes prepaid the standard answer for people who have just arrived or whose NIE appointment is still weeks away.
The trade-off is convenience rather than cost: you have to remember to top up, bundles are often less generous than contract equivalents, and some operators expire unused credit or deactivate dormant numbers. If you plan to keep the number long term, read the inactivity terms before relying on it for bank verification codes.
A monthly contract bills you in arrears by direct debit, which is why it asks for more: an NIE, a Spanish bank account and often proof of address, sometimes with a basic credit check. That is commercial caution rather than an immigration rule — the operator is extending credit and wants to know where to collect.
Contracts are where the convenience lives: bundled mobile-plus-fibre packages, family lines, handset financing and better data allowances. For most people the sensible pattern is to start prepaid and move to a contract once the NIE and bank account exist, keeping the same number by porting it.
These four options are not really competitors — most expats use at least two, often in sequence. The table is deliberately qualitative: what each route typically asks of you and who it suits, not what it costs, because tariffs and promotions change constantly and vary by operator.
| Option | What you typically need to provide | Who it tends to suit |
|---|---|---|
| Prepaid SIM (prepago) | Passport or EU ID for the operator's register; no bank account or NIE in most cases; pay up front and top up | New arrivals |
| Monthly contract (contrato) | NIE, Spanish bank account for the direct debit, usually proof of address; possible credit check | Settled residents |
| eSIM (digital SIM) | A compatible unlocked phone and an app or QR code; ID rules still apply for a Spanish number | Before you fly |
| Home fibre (fibra / FTTH) | Installation address, ID, a Spanish IBAN for the direct debit, plus an installation appointment | Anyone staying |
Two things are worth spelling out. An eSIM is a format, not a separate kind of contract — a Spanish eSIM carries the same identification requirements as a plastic one. And home fibre is the only row involving a technician and a calendar, which is why it is worth starting earlier than feels necessary.
An eSIM is downloaded rather than posted — the profile installs onto a chip already inside the phone, usually by scanning a QR code. Most reasonably recent unlocked smartphones support at least one eSIM alongside a physical SIM, which is what makes them so useful during a move.
The most common regret among new arrivals is cancelling the home number too early. It is very likely still attached to your previous bank, your tax authority's login, your former employer's two-factor authentication and a decade of forgotten accounts — and losing access while you are simultaneously opening accounts in a new country is genuinely miserable.
The clean solution is to run two numbers for a while: keep the home number alive on one SIM slot, often on the cheapest pay-as-you-go tariff your old provider offers, while a Spanish number sits in the other doing the day-to-day work. Once you have moved your important logins across, you can let the old one go on your own timetable.
One distinction trips people up. A data-only travel eSIM bought before you fly gives you working internet the moment you land — excellent for maps, translation and calling a taxi — but it usually does not give you a Spanish number capable of receiving Spanish SMS verification codes. So the pragmatic sequence is: travel eSIM or roaming for the first few days, a Spanish prepaid SIM or eSIM within the first week, then a decision about a contract once the NIE and bank account exist. Remote workers should read the guide to the best Spanish cities for digital nomads alongside this one, since connectivity varies far more between neighbourhoods than between cities.
There is no single correct route, but this order removes the most friction for the greatest number of people. Treat it as a default rather than a rule.
Once you have a Spanish number you are not stuck with the operator who sold it to you. Portabilidad is a right, not a favour, and it applies when moving between Spanish operators, including from prepaid to contract.
The mechanics are simple: you do not contact your current operator. Sign up with the new one, ask them to port the number, and they handle the request. Cancelling with your existing operator first is the classic mistake, because a cancelled number cannot be ported.
The Oficina de Atención al Usuario de Telecomunicaciones — the Spanish government's telecoms user office — lists the right to change operator while keeping your number from the national numbering plan within a maximum of one working day. The EU sets the same expectation across member states: you can change telecoms provider without changing your phone number “within one working day”.
Sources: Oficina de Atención al Usuario de Telecomunicaciones — Derechos del usuario and Your Europe — Telecommunication services.
Requests do get rejected, but the reasons are usually mundane and fixable: mismatched details, a portability request already in progress, a SIM reported lost or stolen, or the number not belonging to the operator you named.
Spain's fixed broadband market is unusually fibre-heavy. Rather than upgrading copper incrementally, Spanish operators built fibre to the home at scale, and the regulator's figures show how far that has gone. The CNMC reported fibre to the home reaching 17.5 million lines in August 2025, out of 19.3 million total fixed broadband lines. In its March 2024 report the regulator put it plainly: “87% of broadband lines in Spain are already fibre optic lines to the home (FTTH)”.
Sources: CNMC — telecoms data, August 2025 and CNMC — telecoms data, March 2024.
If you are arriving from a country where fibre is still the exception, that is a pleasant shock: in most Spanish towns the question is not whether fibre reaches your street but which operators have equipment in your building. Check coverage against the Ministry for Digital Transformation's published broadband coverage maps and annual reports, which break availability down to municipality level.
Source: Ministerio para la Transformación Digital — broadband coverage information.
The same CNMC reporting identifies Movistar, Orange and Grupo MASMOVIL as holding the largest shares of fixed broadband lines, alongside a long tail of smaller and regional providers. That is purely market context: this guide does not rank operators or recommend one over another. Compare current offers at your own address rather than relying on general reputation.
Ordering fibre in Spain usually means an appointment with a technician rather than a router in the post, especially if the property has never had a fibre connection before. The visit typically involves running fibre from the building's entry point to your flat, fitting a small optical terminal, and connecting the router.
Someone over eighteen must be at the property for the appointment window, usually a morning or afternoon slot rather than a precise time. Test the connection while the technician is still there and note the router's admin details. If installation cannot be completed — a locked riser, missing permission, no free port — ask in writing what is blocking it and what happens next.
Spanish telecoms contracts frequently include a permanencia clause: a minimum commitment period given in exchange for something of value at the start, such as discounted installation, a subsidised handset or a promotional rate. Leave early and you typically owe a penalty.
Permanencia is neither sinister nor universal — it is simply how the operator recovers an up-front cost. What matters is knowing whether your contract has one, how long it runs and what leaving early would cost, before you sign rather than when you try to move house.
One right is worth committing to memory: if the operator unilaterally modifies your contract conditions for valid reasons, you have the right to terminate. The telecoms user office lists “el derecho a resolver el contrato en cualquier momento” along with the right to end it without penalty where the operator has imposed a unilateral modification. In practice this means a mid-contract price rise is often your opportunity to leave cleanly — but act promptly and in writing when you are notified.
Source: Oficina de Atención al Usuario de Telecomunicaciones — Derechos del usuario.
The national fibre picture is strong, but averages are cold comfort when your finca sits two kilometres past where the fibre stops. Rural Spain, mountain villages and scattered campo housing are where the honest answer is that you must check the specific address rather than the region.
Before committing to a rural property, check for yourself rather than trusting the listing: stand in the house and test mobile signal on more than one network, ask the neighbours what they use and whether it survives bad weather, and check the address against the Ministry's coverage maps. If you will work remotely, treat this as a viewing criterion on a par with the roof.
Spain rewards planning ahead here, because two things collide when you move: your permanencia clause and the coverage at your new address.
Most operators transfer a home connection to a new address as a change of installation rather than a new contract, keeping your commitment running and usually avoiding a penalty. It depends on whether they can serve the new address, so check coverage there first. If they cannot, ask what happens to any remaining commitment; policies differ.
Cancel in writing, or through a channel that gives you a reference number, and keep the record. Ask for confirmation of the final billing date and whether equipment must be returned — unreturned routers are a common source of surprise final charges. If you are switching rather than simply stopping, let the new provider handle it so the number moves with you.
Do not just stop paying and hope the direct debit fails. An unpaid Spanish telecoms account can follow you into debt registers and complicate future contracts and credit. Close accounts formally, get written confirmation, and leave a buffer before cancelling the bank account the direct debits come from — covered in the bank account guide.
Once you hold a Spanish number, travel within the EU is straightforward. Under the EU's roam-like-at-home rules you do not pay additional charges to use your mobile in another EU country — calls, texts and data come out of your domestic allowance rather than being billed separately.
Two caveats. Operators may apply fair use policies capping roaming data on very cheap or unlimited plans, and they monitor usage: if you spend more time abroad than at home and your roaming exceeds domestic use, surcharges are permitted within regulated caps. Roaming outside the EU and EEA is not price-capped and can be expensive. Calling another EU country from Spain is separately capped at €0.19 per minute and €0.06 per text, including VAT.
Sources: Your Europe — Mobile roaming costs and Your Europe — Telecommunication services.
One practical note: roaming rules are designed for travel, not for permanently living in one country on another country's SIM — another reason to move to a Spanish number rather than roaming indefinitely on your old one. If you are still shuttling between countries during the 90-day Schengen window, roaming is perfectly sensible in the meantime.
Telecoms is one of the most complained-about sectors in Europe, and Spain has a formal, free route for resolving disputes that far too few expats know exists.
Every complaint starts with the operator. Use a channel that generates a reference number (número de reclamación) and write it down. Keep copies of contracts, bills and any promises made on the phone.
If the response is unsatisfactory, or you receive no reply within one month, take the complaint to the Oficina de Atención al Usuario de Telecomunicaciones (OAUT), the user office of the Ministry for Digital Transformation. It handles complaints from individuals, the self-employed and microenterprises about telephone and internet services; the process is free and can be done online.
Source: Oficina de Atención al Usuario de Telecomunicaciones — Reclamaciones.
Alongside the OAUT you have the general consumer channels: municipal consumer offices (OMIC), regional consumer authorities and the consumer arbitration system, plus independent consumer organisations such as the OCU. For a straightforward billing or service dispute the OAUT is usually the most direct route, because it is the body specifically competent for telecoms. Complaints worth escalating rather than tolerating include billing for services never contracted, charges continuing after a cancellation you can evidence, failed portability, and price rises applied without proper notice.
There is a small but real overlap between getting connected and getting healthcare working. Spanish healthcare admin runs heavily on SMS and apps: appointment bookings send confirmation texts, insurer apps and patient portals verify you with a code sent to a registered number, and video consultations need a stable connection.
In practice a Spanish mobile number and a reliable connection make healthcare admin considerably smoother, while a foreign number can quietly create friction — a booking you cannot confirm, an app you cannot register on. It is not a barrier to getting cover, and no insurer requires you to be connected before you can be insured. It simply makes day-to-day life easier, so update your number with your insurer and health centre as soon as you have a Spanish one.
Our guide to comprehensive health insurance in Spain explains what a private plan typically includes, and seeing a doctor in Spain covers how appointments work once you are here. An English-speaking Sanitas adviser can talk through the options.
While you sort your SIM, your number and your home internet, let an English-speaking Sanitas adviser handle your health insurance. Tell us your age, region and what you need — we'll match you to a plan and set your contact details up properly from day one.
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