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Connectivity & techBy Clever Tourists · Published
EU visitors need nothing in Spain, and most UK visitors on O2, Smarty or iD Mobile need nothing either; Americans, Canadians, Australians and EE, Vodafone or Three customers on short trips are best served by a data eSIM, while a Spanish prepaid SIM from Movistar, Vodafone, Orange or Digi wins on a stay of three weeks or more. Spain requires every SIM, eSIM included, to be registered to a named person with a passport, and some operators' own eSIMs need a Spanish number to activate, which is why travel eSIMs are popular here. Our Spain leg ran from late June to late August 2022, about two months from Madrid across the north coast to Barcelona, Valencia and down through Andalusia to Tarifa, so long-stay maths and rural coverage both apply.
EU/EEA: you do not need anything. Roam Like at Home means your domestic allowance works here at no extra cost, subject to your operator's fair-use limit on cheap unlimited plans.
UK: post-Brexit, the four big networks no longer match. As of 2026 O2 still includes EU roaming at no daily charge (with a fair-use cap of about 25GB), while EE, Vodafone and Three charge a daily fee of roughly £2 to £2.75 (≈ $2.7–3.7) on most plans. Smarty, iD Mobile and Lebara include EU roaming. Check your own plan's roaming page before you go, because the fee depends on when you joined.
US and Canada: your home plan works, but usually through a paid daily pass. AT&T's International Day Pass is $12 a day for the first line (capped at 10 charges per bill), and Verizon's TravelPass is also $12 a day. On a two-week trip that is well over $100, which is the main reason Americans buy a travel eSIM.
Australia and New Zealand: home-carrier international day passes exist but are priced per day, so the same maths applies as for US travellers: anything over a few days is usually cheaper on a data eSIM or local SIM.
Two Spanish edge cases: Gibraltar is outside EU roaming, and phones in La Línea de la Concepción and along the Bay of Algeciras often latch onto Gibraltar masts. Andorra is also outside EU roaming. If you visit either, set your home line to a manual Spanish network or rely on the eSIM.
Spain requires every SIM to be registered to an individual. Bring your passport: most operators no longer accept foreign national ID cards from non-EU countries, and the shop scans or photographs the document.
Buy in a shop rather than online. Online orders and some operators' prepaid eSIMs (Movistar in particular) ask for a Spanish address or an SMS code to an existing Spanish number, which a tourist does not have. Airport kiosks work but city-centre shops are usually cheaper.
Movistar (Telefónica) has the broadest rural coverage. Vodafone is the other legacy network. Orange merged with MásMóvil in 2024 to form MasOrange, which also runs Yoigo. Digi, a Romanian-owned operator, has grown fast on cheap prepaid plans and is now a real fourth option. Lebara and Lowi resell larger networks.
Movistar, Vodafone and Orange sell prepaid packs valid around 28 days with generous data, which on a month-long trip beat any travel eSIM on price and give you a Spanish number.
A travel eSIM (apps such as Airalo, Yesim or Saily) avoids the registration step entirely and works the moment you land at Barajas or El Prat. On a one or two week trip the price difference is small and the time saved is a morning. See our eSIM or local SIM comparison for when each makes sense.
Realistic numbers for a phone used for maps, messaging, ticket QR codes and some photo uploads: about 0.5 to 1GB a day. Add 1 to 2GB a day if you video call home, stream music on long train rides or hotspot a laptop. A one-week trip is comfortably 5 to 10GB; two weeks, 10 to 20GB.
Unlimited plans are worth it only if you will hotspot a laptop or stream video daily. Note that many "unlimited" travel eSIMs slow you down after a daily threshold, so read the fair-use line before you pick one.
Spain-specific data uses: Renfe and Ouigo e-tickets (download on Wi-Fi), timed tickets for the Alhambra, Sagrada Família and Real Alcázar, which you may need to pull up at the gate, and Google Maps in Granada's Albaicín and Seville's Santa Cruz, where streets twist enough that you will check the map often. Our Andalusia itinerary lists the timed-entry sights.
Most travel eSIMs are data only. Spanish restaurants and hotels take bookings by WhatsApp, and Cabify and Uber work with your home number, so most short-trip visitors do not need a Spanish number.
A Spanish number helps if you are staying a month or more, renting a flat, or booking through local apps that verify by Spanish SMS. Keep your home SIM active on the physical slot for banking texts either way.
• Your phone must be carrier-unlocked and eSIM-compatible. Most iPhones since the XS and recent Pixel and Galaxy models are; check Settings before you buy.
• Install the eSIM at home on Wi-Fi, but leave it off. Many plans start their validity clock on first connection, not on purchase.
• On landing, switch mobile data to the eSIM line, turn data roaming on for that line (travel eSIMs technically roam on a local network) and keep data roaming off on your home line so it cannot run up charges.
• Keep your home SIM active for calls and SMS so banking and two-factor texts still arrive. Turn on Wi-Fi Calling on the home line to take calls over hotel Wi-Fi without roaming charges.
Madrid, Barcelona, Valencia, Seville and the coastal resorts have strong 4G and 5G. The AVE high-speed lines are mostly covered, with short drops in tunnels such as those through the Guadarrama north of Madrid.
The weak spots are rural and mountainous:
• Picos de Europa: the Cares gorge trail from Poncebos and the high valleys have long dead stretches. We spent two nights in Poncebos in July 2022 between Gijón and Santander, and it is the clearest example on our Spain route of a place to download offline maps first.
• Inland Asturias, Galicia and the Pyrenees: expect gaps between villages.
• Sierra Nevada and the Alpujarras: patchy away from the main villages.
• Interior Castilla and Extremadura: coverage on main roads, thin between towns.
Movistar generally reaches furthest in these areas. Wi-Fi is standard in hotels and common in cafés. For the full route context, see our 60-day Spain itinerary and Spain guide.
Not with an EU plan or a UK plan that includes EU roaming, such as O2, Smarty or iD Mobile. US, Canadian and Australian visitors, and EE, Vodafone or Three customers on short trips, usually save money with a data eSIM.
Yes. Spain requires every SIM, including eSIMs, to be registered to a named person, and most operators want a passport from non-EU visitors.
Movistar has the broadest rural coverage, which matters in the Picos de Europa, the Pyrenees and inland Spain. Vodafone and Orange are strong in cities, and Digi is the low-cost option.
No. Gibraltar is outside EU roaming, and phones near La Línea and the Bay of Algeciras can connect to Gibraltar masts. Set your home line to a Spanish network manually or rely on your eSIM.
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