Staying Connected Between the UK and Spain

More than 280,000 British nationals live in Spain, and millions more visit family, second homes and holiday rentals every year. Since Brexit changed how UK mobile plans treat European roaming, keeping a working phone on both sides of the journey has quietly become one of the most common recurring travel costs. The good news is that in 2026 there are better ways to handle it than paying daily roaming fees or queueing for a Spanish SIM card at the airport.

The post-Brexit roaming reality

Before 2021, UK phone contracts included EU roaming by law, so a trip to Malaga cost nothing extra. That guarantee disappeared with Brexit, and most major UK networks have since reintroduced roaming charges for Spain and the rest of the EU. Depending on the provider, travellers now pay roughly 2 to 7 pounds per day simply to use their existing allowance abroad. For a two week holiday that can add up to 100 pounds before a single extra gigabyte is bought, and for people who split their time between the UK and the Costa del Sol or the Costa Blanca, daily fees quickly become unworkable.

Some networks still advertise inclusive EU roaming, but the details matter. Fair use caps often limit how much data can be used abroad, and several providers apply a maximum number of roaming days per year. Anyone spending more than a couple of months in Spain can find their plan throttled or suspended under rules buried in the small print.

The old answer: a second SIM card

For years, the standard advice for frequent visitors was to buy a Spanish prepaid SIM on arrival. It works, but it comes with familiar frustrations. You need to find a shop, show your passport for registration, and physically swap the card in your phone. Your UK number is unreachable while the Spanish SIM is in the slot, which is a real problem now that banks, delivery services and booking platforms all send verification codes by text message. And the little plastic card has a habit of getting lost in a wallet somewhere between Alicante and Gatwick.

What an eSIM changes

An eSIM is a digital SIM profile that is downloaded straight to the phone, usually by scanning a QR code. Almost every phone released since 2019 supports the technology, including iPhones from the XS onwards and most Samsung and Google models. Instead of swapping cards, you install a data plan in a few minutes over WiFi, before you even leave home.

The practical difference is bigger than it sounds. The physical UK SIM stays in the phone, so calls and text messages to the UK number still arrive, which keeps banking apps and two factor verification working. The eSIM handles mobile data on the Spanish side. There is nothing to collect, nothing to register in a shop and nothing to lose.

Pricing is the other change. Because providers of a travel eSIM do not run their own masts and instead buy capacity on local networks, data packages tend to cost a fraction of UK roaming rates. Travellers choose a package by destination and data volume, pay once, and avoid the daily fee model entirely. For a typical holiday, 10 to 20 gigabytes covers maps, messaging, video calls and the occasional film, and costs less than most networks charge for four or five roaming days.

For longer stays in Spain

Expats and second home owners have slightly different needs. A country specific plan, such as an eSIM for Spain, connects to Spanish network infrastructure directly rather than through roaming agreements, which generally means better speeds and more generous data allowances for the price. Longer validity periods suit people who fly out every few weeks, since the same profile can be topped up rather than replaced.

It is worth being honest about what an eSIM does not replace. Anyone living in Spain permanently and wanting a Spanish phone number for local calls will still eventually want a Spanish contract. But for the large group of people who live between the two countries, an eSIM for data plus the original UK SIM for calls and verification codes has become the standard setup, and it avoids signing up for a contract in a country where you only spend part of the year.

Practical tips before you fly

A few things are worth checking before relying on an eSIM for a trip. First, confirm the phone is eSIM compatible and not locked to a UK network; phones bought on contract before 2022 are sometimes still locked, and the network can unlock them for free on request. Second, install the eSIM over WiFi at home rather than at the airport, since the initial download needs a connection. Third, make sure data roaming is switched on for the eSIM line and off for the UK line, otherwise the phone may quietly route data through the expensive option.

Finally, keep an eye on usage the same way you would at home. Video streaming in high definition is the main thing that eats a data allowance, and most phones can show per line usage in settings, so it takes seconds to check how much of the package is left.

The bottom line

Brexit took away free roaming, but technology has largely filled the gap. For short visits, a travel data package avoids daily charges. For the UK and Spain regulars, a dedicated Spanish data plan plus the original UK SIM keeps everything working on both sides of the journey for a predictable, one off price. Either way, the days of hunting for a SIM card shop on the first morning of a holiday are over.