Keep Your UK Number Living in Spain, France, Portugal & Beyond — Expat & Long-Stay Setup (2026)

Short trips and long stays use the identical two-line trick, but long stays add a couple of wrinkles: you care more about plan validity and monthly data, and you may occasionally bump into a host-country service that wants a local number. There’s also a post-Brexit twist for Europe — see below. This guide covers the long-stay specifics on top of the core setup in our UK guide to phones abroad.

The post-Brexit roaming twist (why Europe is the catch)

Before Brexit, UK SIMs roamed across the EU for free under “Roam Like At Home.” That guarantee is gone. Many UK networks — check yours, as terms differ — have reintroduced EU roaming fees or daily caps, so using your UK SIM’s data on the continent can now cost real money. That’s exactly why a Europe or country travel eSIM is worth it: flat, predictable data, while your UK number stays reachable on Wi-Fi Calling. Confirm your network’s current EU roaming terms on its official page before you fly.

The long-stay core setup (same everywhere)

• UK line: downgrade to the cheapest plan that keeps your number (see our park-your-number guide), Wi-Fi Calling on, data roaming off so post-Brexit EU charges never apply.
• Destination eSIM: choose a plan with a validity window that matches your stay — many long-stay British expats prefer a monthly-renewing plan over a 7-day tourist pack.
• Bank 2FA: codes and push approvals from Barclays, HSBC, Lloyds, NatWest, Monzo, Starling, and HMRC’s Government Gateway reach you over Wi-Fi Calling. Lean on banking-app push where possible — see the UK bank 2FA abroad guide.

Country-by-country notes

Spain (the classic British expat & snowbird base)

The biggest British expat community in Europe, from the Costa del Sol to the Canaries, plus a huge snowbird crowd wintering south. A Spain eSIM covers data across coastal towns and cities; if your villa or apartment has Wi-Fi, a modest monthly bucket is usually enough, and your UK number keeps working over that Wi-Fi for calls and codes. Spanish banks and residency (the padrón and NIE process) may eventually want a local number — that’s a separate local SIM, not a reason to drop your UK line. Grab a Spain eSIM for the data half.

France (long-stay favourite for retirees and remote workers)

From Provence to Paris, a long-running favourite for British retirees and second-home owners. A France eSIM gives you reliable data whether you’re settled in one place or touring the regions, and a regional Europe eSIM is handy if you’ll cross borders often. See France options, and remember the post-Brexit roaming charges above are the reason to run data on the eSIM rather than your UK SIM.

Portugal (the fast-growing expat & winter destination)

Increasingly popular with British expats and winter-sun seekers, from Lisbon to the Algarve. A Portugal eSIM covers city and coast; Wi-Fi is widespread in cafés and rentals, so your UK number stays reachable for banking and family. Residency portals and local banks may eventually want a local number, but that’s an add-on. See Portugal options.

Wider Europe (Italy, Greece & touring the continent)

Plenty of British long-stayers split the year across the Mediterranean. If you’ll move around, a regional Europe eSIM is the easiest fit; a country plan works if you’re settled. See Italy, Greece, and the broader Europe eSIM guide — all of which spare you the post-Brexit roaming bill.

Worldwide (USA, Thailand & beyond)

The pattern is the same outside Europe. Wintering long-haul or splitting time stateside? A USA eSIM or a Thailand eSIM gives you local data while your UK number stays alive on Wi-Fi Calling. Pick the eSIM for your country from our destinations and the rest of the setup never changes.

Long-stay-specific things to plan

Match eSIM validity to your stay

A 7-day tourist plan is the wrong shape for a 3-month winter in Spain or a year in France. Look for monthly-renewing or long-validity plans so you’re not re-buying constantly — and so the plan covers your whole season.

Estimate data by your Wi-Fi situation

If your rental has Wi-Fi, you mostly need cellular for when you’re out — maps, transport apps, messaging — and a 10–20 GB monthly bucket goes far. No home Wi-Fi? Size up to a larger monthly or unlimited-style plan.

Decide if you need a local number at all

Most long-stay British expats never do — the travel eSIM plus the UK line covers everything. Only add a local number if a specific host-country service (a Spanish or French residency app, a local bank, certain delivery platforms) demands a local mobile for its own SMS. It’s an add-on, not a replacement for your UK line.

Keep the UK line from lapsing

On a long stay, set the UK plan to auto-renew and use Wi-Fi Calling occasionally so a pay-as-you-go line doesn’t expire for inactivity — many UK PAYG SIMs disconnect after a few months of no chargeable activity, so check yours. Details in the park-your-number guide.

FAQ

Why do I need an eSIM in Europe now that I’m a UK expat?

Since Brexit, many UK networks have reintroduced EU roaming charges or daily caps — free Roam Like At Home is no longer guaranteed, so check your tariff. A Europe or country travel eSIM gives you data at a flat, predictable price, while your UK number stays alive on Wi-Fi Calling for calls, texts, and bank codes. Turn data roaming off on the UK line so it never racks up charges.

Do I need a local SIM in my host country if I have a travel eSIM?

Usually not for everyday data — a travel eSIM covers maps, transport apps, and messaging. You may want a local number only if a host-country service insists on a local mobile for its own SMS. That’s a separate add-on and doesn’t affect your UK line.

How much eSIM data does a multi-month stay in Spain or Portugal need?

It depends on whether you have home Wi-Fi where you’re staying. Many long-stay British expats rent places with Wi-Fi and use cellular data mainly when out — a monthly bucket of 10–20 GB is often plenty. If your rental has no Wi-Fi, look at a larger monthly or unlimited-style plan.

Is the setup different for Thailand or the USA versus Europe?

The phone setup is identical everywhere — Wi-Fi Calling on the UK line, travel eSIM for data. What changes is the destination eSIM you buy and local quirks like whether a local number is needed for certain services. Pick the eSIM for your specific country and the rest is the same playbook.

Bottom line

Long stays don’t change the method — only the eSIM and a few local details. Post-Brexit, the one thing to get right in Europe is keeping data off your UK SIM: park your UK number on Wi-Fi Calling, buy a destination eSIM sized to your season, and you keep your number working from a Costa del Sol terrace, a Provence farmhouse, or an Algarve flat. Start with the UK guide to phones abroad, then pick your plan by destination.