Switching telecom providers in Spain has become a mass-market ritual: according to regulator CNMC, 491,629 mobile numbers were ported in July 2026 alone, up 1.4% year on year, alongside 89,367 fixed lines. The rules governing that churn sit in the 2022 General Telecommunications Law (Ley 11/2022), consumer protection legislation and the 2009 Charter of Users’ Rights, which remains in force. Here is how the process works, and where the traps are.
- You keep the number: portability is a right, and it is requested from the new operator, never the old one.
- One business day: the line must go live within a single working day of the agreed date, and downtime cannot exceed it.
- Early exit is proportional: a lock-in clause does not vanish, but any penalty must be scaled to the days remaining.
- Contracts cap at 24 months: beyond that, automatic renewals can be cancelled at any time with a month’s notice at most.
Step one: audit your lock-in clause
Portability is a right; a permanencia is a commitment signed in exchange for something — usually a discount or a handset paid in instalments. Changing operator does not erase it, but the law caps what a provider can charge.
Under article 62.5 of the consumer statute, in force since 1 January 2022, a penalty for breaking a lock-in period must be proportional to the days left on the clock. Two months short of a twelve-month term cannot be priced as if a full year remained. Article 67 of the telecoms law also bars consumer contracts longer than 24 months; after that they roll over automatically, but you can walk away at any point with no more than one month’s notice and no cost.
If the provider alters the terms, it must give at least a month’s warning, and you then have a month to cancel free of charge — unless the change is purely administrative, entirely in your favour, or imposed by regulation. A subsidised handset is settled separately: you only compensate for the device you keep, capped at either its prorated value or the remaining instalments, whichever is lower. Adding services or a new device from the same operator does not extend the original term unless you expressly accept it on signing (article 71).
The practical move: ask your current operator in writing for the end date of your lock-in and the exact penalty payable today, then weigh that figure against the savings on offer elsewhere.
Step two: the new provider does the legwork
The receiving operator — not the one you are leaving — runs the process, under article 70. Both sides must cooperate in good faith, and nobody can transfer your line without explicit consent. Once the switch completes, your old contract is terminated automatically, so there is no need to call ahead to cancel.
Even if you do cancel first, protection does not evaporate: the law preserves your right to take the number with you for at least one month after terminating, unless you waive it. For fixed lines, the geographic number is retained as long as you stay at the same address. Prepaid users can reclaim any outstanding balance on request; a fee is only permissible if it was written into the contract and is proportional to its real cost.
Timing, fibre and escalation
One working day is the ceiling. The number must be activated within a business day of the agreed date, and service loss during the migration cannot exceed it. If the process fails, the incumbent must restore the line and keep serving you on identical terms until the transfer goes through. Fibre follows a parallel logic: the incoming operator activates internet on the agreed date and slot, the outgoing one maintains service until then, and the cut lasts no longer than a business day.
That is tighter than the 2009 Charter, which allowed two business days while aiming for 24 hours. Delays, abuses during a switch and missed installation appointments are also set to trigger compensation, with the detail left to a forthcoming royal decree.
When something goes wrong, complain first to the operator by phone, web, post or in store — it must log a telephone complaint and issue a reference number. Absent a reply within one month, or if the answer disappoints, you have three months to escalate to the OAUT, the telecoms user office attached to the Ministry for Digital Transformation and the Public Function, which has six months to rule; refusal or delay in portability is explicitly among the cases it handles. Cancelling without porting is simpler still: the operator must process it within two days, through the same channel used to sign up, and cannot refuse even where a debt is outstanding.
On paper, Spain’s framework is unusually protective: a single business day, the incoming operator carrying the administrative burden, and penalties tied to the calendar rather than the contract’s headline figure. The friction has migrated elsewhere — into lock-in clauses and, above all, into handsets financed inside the monthly tariff, which turn a change of provider into an outstanding balance. Anyone signing a new deal should separate the price of the device from the price of the line, and ask what leaving in month four would cost. The answer is the clearest measure of how much freedom the contract actually buys.