Portability and Switching Providers in Spain: Avoid Issues

🇪🇸 Read the original in Spanish

Changing your telephone, internet, or energy provider is one of the most common daily administrative tasks for consumers in Spain, but it is also one of the leading sources of complaints and headaches. The promise of a cheaper rate or better coverage is often overshadowed by unexpected penalties, temporary service outages, or the dreaded "double billing." Knowing your rights as a consumer and understanding the legal framework that protects you is the only way to carry out a portabilidad (number portability/switching process) with total security and without surprises in your bank account.

The Legal Framework: Which Laws Protect Consumers in Spain?

The process of portability and switching companies is not left to the free whim of the service providers. In Spain, there is a solid regulatory umbrella designed to balance the scales between large corporations and the end user.

The cornerstone of this protection is the _Real Decreto Legislativo 1/2007, de 16 de noviembre, por el que se aprueba el texto refundido de la Ley General para la Defensa de los Consumidores y Usuarios_ (General Law for the Defence of Consumers and Users, hereinafter LGDCU). This law establishes fundamental principles that companies cannot bypass under any circumstances:

• The right to pre-contractual information (Article 60 LGDCU): Before being bound by any contract, the operator must provide you with all relevant information clearly, comprehensibly, and free of charge: conditions, prices including taxes, duration of the contract, and the existence of any potential compromisos de permanencia (minimum stay commitments).
• The right to terminate the contract (Article 62 LGDCU): This article is key. It explicitly establishes that the consumer can exercise their right to terminate the contract at any time. Furthermore, it expressly prohibits companies from imposing obstacles or disproportionate penalties for terminating the service. The law determines that cancelling a service must be just as simple as signing up for it.
• The prohibition of unfair terms (Article 82 et seq. LGDCU): Contractual clauses that impose disproportionate guarantees, force the consumer to pay for services not rendered, or unilaterally limit the user's rights are considered null and void by law.

On the other hand, the _Ley 34/2002, de 11 de julio, de servicios de la sociedad de la información y de comercio electrónico_ (LSSI - Law on Information Society Services and Electronic Commerce) regulates electronic contracting (for example, when you sign up for a rate through the operator's website), guaranteeing that consent must be explicit and that the consumer must receive a written confirmation of the agreed terms within a maximum period of 24 hours.

The Portability Process Step-by-Step: A Practical Guide

To avoid being left in a "limbo" without service or receiving duplicate bills, it is essential to follow a rigorous order in your administrative steps. Follow these steps to ensure a successful switch:

Step 1: Review Your Current Contract and Minimum Stay

Before contacting the new company, locate your last bill or access the customer area of your current operator. You must check if you have an active compromiso de permanencia (minimum stay commitment) and, if so, what the penalty would be for breaking it. Remember that the penalty must be proportional to the remaining time left to fulfill the commitment; they cannot charge you the full penalty if you only have one month left on your contract.

Step 2: Request Portability from the New Company

Portability proper consists of keeping your current phone number when switching operators. It is the new company that must manage the process with your old one. By requesting portability, you are implicitly authorising the technical cancellation of the line with your original operator. Do not request the cancellation of the telephone line from your old operator yourself beforehand, or you will lose your phone number.

Step 3: The Right of Withdrawal (If You Change Your Mind)

If you sign the contract over the phone or online (outside of a physical business establishment), the law grants you the _derecho de desistimiento_ (right of withdrawal). You have a period of 14 calendar days to back out without needing to provide any justification and without any penalty.

Step 4: Installation and Physical Switch

If the contracted service includes fibre optic internet, a technician will come to your home to install the new line. In the case of mobile telephony, you will receive a new SIM card. The switch window (the moment you lose signal with the old operator and the new one is activated) usually takes place in the early hours of the morning (between 2:00 AM and 6:00 AM) to minimise the impact on the user.

Step 5: Return of Equipment and Confirmation of Additional Cancellations

Once the portability is complete, the old operator will require you to return any equipment provided under a rental or loan agreement (such as the router or TV decoder). You have a strict deadline (usually 15 to 30 days) to hand them over at an authorised shop or via the courier service they specify. Always keep the receipt of delivery. Likewise, make sure that any services not linked to the phone number (such as independent pay-TV services or cloud storage) have been effectively cancelled.

Deadlines, Amounts, and Key Figures You Must Know

In the telecommunications and utility sectors, time and numbers are essential. Here are the key figures regulated by Spanish law that you should always keep in mind:

• 1 business day: This is the maximum legal timeframe for a mobile portability to become effective from the moment the user signs the request, according to the guidelines of the Comisión Nacional de los Mercados y la Competencia (CNMC - National Markets and Competition Commission).
• 14 calendar days: The legal withdrawal period for contracts signed online or over the phone. The countdown starts from the signing of the contract or from the receipt of the equipment.
• 15 to 30 days: The average timeframe companies grant to return the router or equipment after cancellation.
• Between €80 and €150: The typical average penalty that companies attempt to charge if you do not return the router on time.
• Proportionality of the minimum stay: If you signed a minimum stay with a penalty of €120 for 12 months, and you decide to leave in month 9, the company can only charge you the proportional part of the remaining 3 months, which is €30 (one-quarter of the total), never the full €120.

Concrete Examples of Real-Life Situations

To understand how these rules and figures apply in the real world, let us analyse two very common scenarios:

Example 1: Carlos's Minimum Stay Penalty Case

Carlos has a contracted fibre and mobile package with Operator A. He signed a contract with a 12-month minimum stay associated with a discount on his rate, with a maximum penalty of €240 in case of breach.

At 8 months into the contract, Carlos decides to port his number to Operator B because they offer a better rate. Operator A demands the payment of the full €240 penalty.

• What does the law say? According to Article 74 of the LGDCU and consumer doctrine, the penalty must be strictly proportional to the number of unfulfilled days.
• The correct calculation: Carlos has fulfilled 8 out of the 12 months (66.6% of the contract). He has 4 months left to fulfill (33.3%). Therefore, the maximum penalty Operator A can legally charge him is €80 (33.3% of €240). Any charge above this amount is illegal and can be disputed.

Example 2: Sofía's Unreturned Router

Sofía carries out a portability of her home internet line. The process is completed successfully and she begins enjoying her new connection. However, due to moving house, she forgets to return the old operator's router. After 45 days, she notices a charge on her bank account of €120 under the concept "Penalty for non-return of equipment."

• What does the law say? Companies have the right to recover their equipment or to demand compensation if the user keeps it, provided this clause was clearly included in the contract.
• The solution: Sofía must locate the router, immediately go to an authorised drop-off point of her old company, hand over the device, and demand a physical receipt of delivery. With this receipt, she must open a complaint with the customer service of her old company to request the refund of the €120, as returning the equipment (even if late) extinguishes the unjust enrichment on the part of the company.

Mistakes You Must Avoid

Making a mistake during the process of switching companies can turn out to be very expensive. Avoid falling into these common traps:

• Cancelling the line yourself with the original company: If you call your current operator to cancel your phone number before the new company initiates the portability, you will lose your number forever. Let the new company manage the process.
• Believing verbal offers without physical proof: Never accept a telephone offer without demanding that they send you the conditions via email or SMS before giving your verbal consent. Words are easily forgotten; written contracts are the only proof when filing a complaint.
• Ignoring the return of rented equipment: Even if the router seems old or useless to you, legally it is the property of the company. Failing to return it usually brings automatic penalties of more than €100 that operators charge directly to your bank account.
• Not cancelling non-portable additional services: Portability only transfers telephone lines. If you had a contracted music streaming service, an antivirus licence, or device insurance with your old operator, these services may remain active and continue to be billed independently. You must explicitly request their cancellation.

Frequently Asked Questions (FAQ)

Do I have to pay anything to port my number?

No. Porting a telephone number (both landline and mobile) is a consumer right, and the switching process itself is completely free of charge. However, you must be careful with potential installation costs that the new company might pass on to you if you decide to leave shortly after, or with minimum stay penalties you might have with your current operator.

What happens if the new company charges me installation costs and then I withdraw from the contract?

If you decide to exercise your right of withdrawal within the 14 calendar days, you cannot be penalised for cancelling the contract. However, if the technician has already come to your home and carried out the physical installation of the fibre with your express consent, the company can justifiedly charge you for the cost of the installation work carried out (which usually ranges between €100 and €150), provided they informed you of this cost before contracting.

I have been charged a bill after switching companies, is this legal?

It depends on the billing period. Companies bill by calendar months or by specific billing cycles. Upon leaving, the old company has the right to charge you the proportional part of the service consumed up to the exact day the portability was completed. If they charge you for the full month after your departure, this is an illegal practice. You must claim a refund for the proportional part you did not use.

Can I port my number if I have outstanding unpaid bills?

Yes, the receiving operator cannot deny portability due to the fact that you have an outstanding debt with your old operator. However, the original company will still have the right to claim the debt from you through the appropriate legal channels and could even include your details in a fichero de solvencia patrimonial (credit register/bad debtors list) if the debt is real, overdue, and demandable.

What do I do if my old operator refuses to process the cancellation or keeps billing me?

You must file a formal written complaint with the company's customer service department, demanding a complaint reference number. If you do not receive a response within one month or if the response is unsatisfactory, you can turn to the Oficina de Atención al Usuario de Telecomunicaciones (Telecommunications User Care Office, under the Ministry of Economic Affairs and Digital Transformation) or the Oficina Municipal de Información al Consumidor (OMIC - Municipal Consumer Information Office) of your local town hall to process a consumer arbitration.

In Summary

• Portability is free, but you must watch out for active minimum stays and the return of your old operator's equipment to avoid extra charges.
• The law protects you: The General Law for the Defence of Consumers and Users (LGDCU) prohibits disproportionate penalties and grants you the right to cancel a service with the same ease with which you signed up.
• You have 14 calendar days to withdraw from any contract signed over the phone or online without any penalty.
• Proportionality is mandatory: If you break a minimum stay, the penalty charged to you must be reduced proportionally to the time you have already fulfilled under the contract.
• Always keep receipts: Save the router delivery receipt and any written communication with the companies until you are sure the process has concluded with no outstanding debts.

General legal information, not personalised legal advice. For your specific situation, ask your question for free at AbogadoAI — answers grounded in Spanish law (BOE), in English.

This is general information, not legal advice. Verify on the BOE or consult a lawyer for your specific case.