Phones & data
eSIM vs roaming for Irish travellers
Your Irish plan already works across the EU, mostly. Here's where the small print bites, when an eSIM earns its keep, and when it's money you didn't need to spend.
Your phone pinging a “Welcome to Spain” text as the plane taxis in at Tenerife South is one of the small joys of being an EU citizen. For most Irish travellers, in most of Europe, your plan simply works, and a travel eSIM would be money you didn’t need to spend.
But Roam Like at Home has small print, and the edges of the map are where the bills live. A stingy prepay fair-use cap, a week in Zurich, a Moroccan mast picked up from a beach near Tarifa or a cruise ship’s satellite network can all produce a phone bill you’ll remember longer than the holiday.
Here’s how roaming works for Irish customers at the time of writing (November 2026), what an eSIM actually is, and a plain decision table so you can work out which you need in about a minute.
How Roam Like at Home works
Since 15/06/2017, EU rules have meant that when you travel in the EU and EEA, your Irish plan’s calls, texts and data work as they do at home, with no daily fee. In 2022 the rules were extended until 30/06/2032, so this isn’t going anywhere soon.
The zone is the 27 EU countries plus Iceland, Norway and Liechtenstein. That includes the bits people forget are EU: the Canaries, the Balearics, Madeira and the Azores. As far as your phone is concerned, a week in Tenerife is a week in Tallaght.
One catch: it’s for travel, not relocation. If, over four months, you spend more time and use more data abroad than at home, your network can warn you and then add surcharges. Wintering in Valencia? Get a local SIM.
Fair-use limits: the bit that catches people
Calls and texts are rarely an issue. Data is where fair use kicks in, and the bigger or cheaper your allowance, the more likely it is to bite.
For bill-pay and SIM-only plans with large or unlimited data, EU rules set a floor. Your EU allowance must be at least twice your monthly price (excluding VAT) divided by a regulated wholesale rate, which is €1.10 per GB in 2026 and falls to €1 in 2027. On a €30-a-month plan, that works out at roughly 44GB. On a €15 plan, nearer 22GB.
Prepay is stricter. Networks are allowed to base your cap on the credit on your account when you start roaming, which can leave you with far less than the “unlimited” on the tin.
Go over, and your network must warn you before charging a surcharge capped at that wholesale rate plus VAT: roughly €1.35 per GB at the time of writing. Annoying, not ruinous. Your exact allowance is on your network’s roaming page or app.
The UK after Brexit
The UK left the EU roaming zone with Brexit, so EU law no longer protects you there. At the time of writing, the main Irish networks include the UK and Northern Ireland in your plan anyway, by choice rather than obligation.
Good news for a weekend in Edinburgh, but it’s a commercial decision that could change, and budget brands may treat the UK differently. Check before you go.
Where roaming gets expensive
Outside the EU and UK, Irish networks charge either a daily roaming pass or pay-as-you-go rates, and both add up quickly over a fortnight. The usual suspects for Irish travellers:
- Switzerland. Bang in the middle of Europe, but outside the EU and EEA. Some plans include it; many don’t.
- Turkey. Antalya, Dalaman and Bodrum are hugely popular with Irish holidaymakers, and all are non-EU roaming.
- The USA and Canada. A daily pass can make sense for a long weekend in New York. For two weeks in Florida, it rarely does.
- Morocco, Egypt and Tunisia. Marrakech, Hurghada and Sharm el-Sheikh are all outside the zone.
- The Middle East. Dubai, Abu Dhabi, Doha and Jordan, including stopovers.
- The non-EU Balkans. Montenegro, Albania, and Bosnia and Herzegovina. Driving to Dubrovnik from Split, the old coast road crosses a short stretch of Bosnian territory at Neum; the Pelješac Bridge now lets you skip it.
- Ships and planes. At sea, your phone can connect to a ship’s satellite network, which isn’t covered by Roam Like at Home even in EU waters. In-flight mobile networks are the same. Use airplane mode and Wi-Fi.
Watch the border bleed
Your phone grabs the strongest signal, not the cheapest. On the coast around Tarifa it can latch onto a Moroccan network; on Kos, Rhodes or Samos, a Turkish one. Near a non-EU border, set network selection to manual and pick a local EU network.
What an eSIM actually is
An eSIM is a SIM chip built into your phone. Instead of swapping bits of plastic, you download a plan by scanning a QR code. Phones that support eSIM can run two lines at once, so your Irish SIM stays exactly where it is.
Travel eSIMs are usually data-only plans for one country or a region, with a set amount of data and a set number of days. You buy before you go, install at home and switch on when you land.
Will your phone support it?
Most phones from the last six or seven years do, including:
- iPhone XS, XR and later, including the second-generation SE onwards
- Google Pixel 3 and later
- Samsung Galaxy S20 and later, the Z Flip and Z Fold ranges, and some recent A-series models
The phone also has to be unlocked. If you bought it through a network, check: on iPhone, go to Settings > General > About and look for Carrier Lock, which should say “No SIM restrictions”. On Android, the simplest test is to ask your network. Get it unlocked before the trip, not from a hotel lobby.
About Vibqo, our sister company
Full disclosure: Vibqo is our sister company. It’s run by Pefwil, the same Dublin team behind Wizuv, and it sells data-only travel eSIMs for single countries and regions. Validity starts when the eSIM first connects abroad rather than when you buy it, and hotspotting is allowed on every plan. We benefit when you buy one, so weigh that (our affiliate disclosure has the detail), and if the table below says you don’t need one, believe it.
Setting up an eSIM before you go
- Buy for the trip you’re actually taking. Match the country or region, the number of days and a realistic amount of data (rough maths below).
- Install at home, on Wi-Fi. On iPhone it’s Settings > Mobile Service (Mobile Data on older versions) > Add eSIM. On Android, look under Settings > Network & internet > SIMs, or Connections > SIM manager on Samsung. Scan the QR code and label the line “Travel”.
- Leave it off until you land. Then switch your data line to the travel eSIM and turn data roaming on for the eSIM, since travel eSIMs technically roam on local networks.
- Don’t delete it mid-trip. Many eSIM QR codes only work once.
Dual SIM: Irish number for calls, eSIM for data
This is the setup we’d recommend to anyone travelling outside the EU:
- Irish line: on for calls and texts, data roaming off. Bank verification codes and delivery texts still arrive. Receiving texts abroad is free on most Irish plans; incoming calls outside the EU usually aren’t, so let them go to voicemail.
- Travel eSIM: your data line, for maps, banking apps and everything else.
- WhatsApp and iMessage keep working on your Irish number, because they’re tied to your account, not to the SIM carrying the data.
- On iPhone, turn off Allow Mobile Data Switching, so your phone doesn’t quietly fall back to Irish data when the eSIM signal dips.
Hotspotting
Need to get a laptop or the kids’ tablets online? Under Roam Like at Home, tethering usually counts towards your fair-use cap like any other data, so check your plan’s terms. Some travel eSIMs block hotspotting entirely, so check before you buy.
Rough data maths: maps and messaging barely register. An hour-long video call can use around 1GB, and streaming in HD can use up to around 3GB an hour. A remote-working week with daily calls can easily get through 15 to 20GB.
Who needs what
| Your trip | What we’d do |
|---|---|
| Weekend in Lisbon or Barcelona on bill pay | Just roam. Check your fair-use number once. |
| A week in the Canaries on prepay or a cheap SIM-only plan | Check your EU allowance. If it’s small and you’ll stream or tether, add a Europe eSIM. |
| City break in London or Edinburgh | Roam. Irish networks include the UK at the time of writing; double-check budget brands. |
| Working remotely in the EU for a fortnight | A data-heavy eSIM, or confirm your cap covers tethering. |
| Switzerland, Turkey, the USA, Morocco, Egypt or the Middle East | Travel eSIM for data, Irish SIM for calls and texts. |
| Croatia plus Montenegro or Albania | A regional eSIM that covers both, or your network’s daily pass for the non-EU days. |
| A cruise | Airplane mode at sea, ship Wi-Fi on board, an eSIM for non-EU ports. |
| Locked or older phone | Your network’s roaming pass, or a local physical SIM. |
| More than four months abroad | A local SIM on a local plan. |
If you’ve landed on one of the eSIM rows, sort it a few days before you fly, so you’re not installing it on airport Wi-Fi with a queue behind you.
Before you fly: a five-minute phone check
- Look up your EU fair-use allowance in your network’s app.
- Check the UK and any non-EU countries on your route, including stopovers and ferry crossings.
- Download offline maps for your destination.
- Switch your banking app to in-app approvals if it offers them, so a dead SIM doesn’t lock you out.
- Note your network’s lost or stolen number somewhere that isn’t your phone.
- Check your travel insurance covers phones and gadgets, and what the excess is.
Plugs, power banks and the rest of the kit are in our travel essentials, and our guide to EHIC and travel insurance covers what your policy should include.
Chasing winter sun? The Canaries and Madeira are inside the EU zone; Egypt, Morocco and Turkey are not.
Quick answers
Do I need an eSIM for Spain or Portugal?
Usually not. Spain, Portugal and the Canaries are covered by EU Roam Like at Home, so your Irish calls, texts and data work as they do at home, subject to a fair-use data cap. An eSIM only makes sense if your cap is small (common on prepay) or you plan to stream, tether a laptop or work remotely.
Is the UK still covered by roaming for Irish phone customers?
Not by EU law since Brexit. At the time of writing (November 2026), the main Irish networks include the UK and Northern Ireland in your plan by choice, so most people pay nothing extra. That could change and budget brands can differ, so check your network's roaming page before you go.
Will I still get bank texts if I use a travel eSIM?
Yes, as long as you keep your Irish SIM switched on alongside the eSIM. Set the eSIM as your data line and leave your Irish line on for calls and texts, with data roaming turned off. Receiving texts abroad is free on most Irish plans, but check your network's rates for countries outside the EU.
How do I know if my phone supports eSIM?
Dial *#06#. If an EID number appears, your phone has eSIM hardware. It also needs to be unlocked: on an iPhone, Settings > General > About > Carrier Lock should say No SIM restrictions. On Android, ask your network if you're unsure.
What happens if I go over my EU fair-use limit?
Your network has to warn you first, and then it can add a surcharge per GB. In 2026 that surcharge is capped at €1.10 per GB plus VAT, so going over in the EU is irritating rather than ruinous. Outside the EU, data prices aren't capped in the same way.
Written by
Wizuv Editorial
Travel desk, Dublin
We're a small team of Dublin-based travellers who fly out of DUB, ORK and SNN far too often. We test the routes, the bags and the eSIMs ourselves, and we'll always tell you when you don't need to buy something.
