5G Ireland eSIM | Vodafone, Three & Eir Coverage
Roami
Roami is a global eSIM carrier focused on travel connectivity. This guide is compiled from network data, official carrier and manufacturer documentation, and traveler inquiries.
📑 Table of Contents
Picking an Ireland eSIM comes down to the roads you will actually drive — this guide maps which of the three networks wins where. Ireland’s three networks trade wins by metric and by county. On Ookla’s 2H 2025 Ireland report, Three was the Best Mobile Network with a Speedtest Connectivity Score of 74.84, Vodafone posted the highest Consistency Score at 83.5, and Eir led 5G Availability at 82.6 percent. Choose for the roads you will actually drive, not for the headline award.
Quick answer: Most travellers in Ireland will be happiest with Three; Vodafone makes sense for tighter budgets and city-only trips. Start with the eSIM compatibility quiz: the one step Ireland travellers skip and pay for later.
Handset support and install mechanics come first — the comparisons can wait until those are clear. The device compatibility list answers the first, and eSIM activation explained answers the second — everything below stays on the carriers themselves.
The 30-second version: Staying in Dublin, Cork or Galway? Three is the fastest network in the country, with a median download of 82.44 Mbps and a median 5G download of 139.87 Mbps. Streaming a lot of video or gaming? Three wins on gaming score at 89.04 and video at 83.7. Driving the Wild Atlantic Way, Connemara or Donegal? Vodafone and Eir reach furthest on the rural low bands, and Eir leads 5G Availability at 82.6 percent. Want to buy straight from an Irish carrier as a visitor? All three sell a tourist eSIM online with no shop visit and, unlike most countries, no identity document at all. Or skip the paperwork: free multi-network trial eSIM tests the networks at no cost, and code WEB20 knocks 20% off Ireland prepaid eSIM plans.
Which carriers can your Ireland eSIM use?
Three vs Vodafone: which is better in Ireland?
| Three | Vodafone | Eir | |
|---|---|---|---|
| Prepaid tourist eSIM for visitors | Yes — Visit Ireland, instant eSIM, but Republic of Ireland only | Yes — Data Unlimited 5G, instant eSIM | Yes — tourist eSIM, activated online via IMEI |
| Best measured strength on Ookla H2 2025 | Best overall connectivity at 74.84; fastest Speed Score at 60.22 | Highest Consistency at 83.5; strongest video at 83.47 | Highest 5G Availability at 82.6; best gaming at 86.33 |
| Cheapest prepaid tourist entry | Visit Ireland: 5GB for 7 days at 15 euro | Data Unlimited 5G: 20 euro every 28 days | Tourist eSIM: unlimited for 20 euro every 28 days |
| Getting it as a visitor | ★★★ — buy online, no shop, no identity document | ★★★ — buy online, no shop, no identity document | ★★★ — buy online via IMEI, no shop, no identity document |
Read that table carefully, because it contains the single most useful fact on this page: all three national carriers now sell a prepaid tourist eSIM that a visitor can buy online before flying, with no store visit and no passport. That is unusual. In many countries a tourist is pushed toward a physical SIM or a travel eSIM, but in Ireland the three networks compete directly for walk-up visitors through app-based eSIMs.
Which budget brands sell eSIMs for visitors?
Ireland’s cheaper brands are where the eSIM picture gets interesting, because not all of them issue a digital SIM at all.
| Brand | Parent network | eSIM for visitors | Who it suits | Price |
|---|---|---|---|---|
| 48 | Three | No — ships a plastic SIM on its standard plans | Longer stays wanting cheap Three unlimited data | From 10.99 euro per month |
| GoMo | Eir | Yes — app only, rolling monthly | Stays over a month wanting cheap Eir unlimited | 12.99 euro per month |
| Tesco Mobile | Three | No — plastic SIM only | Shoppers who want a Three-line SIM from Tesco | 15 euro, 12-month term |
| Lycamobile | Eir | Yes — 28-day prepay, eSIM issued at checkout | Callers wanting cheap Eir minutes and texts | 12.99 euro per 28 days |
Two cautions. First, 48 and Tesco Mobile are the odd ones out: both ride the Three network but send a physical card, so a phone without a SIM tray, such as a US iPhone 14 or newer, cannot use them. Second, GoMo and Lycamobile are monthly or 28-day products rather than seven-day tourist passes, so they suit a longer stay more than a long weekend. Where the carrier wins is longevity and a real Irish number; where the budget brand wins is price on the same masts.
Can you buy an Ireland eSIM from Three?
| Direct from an Irish carrier | Travel eSIM on an Irish network | |
|---|---|---|
| What you need | A compatible unlocked phone; a card or email for online checkout | A compatible unlocked phone |
| How the profile arrives | eSIM download or QR after you top up | QR code or app install immediately after checkout |
| Typical cost | 15 to 25 euro for a prepaid tourist plan | A single upfront price, no SIM fee |
| Network access | One carrier, Three, Vodafone or Eir | Automatic switching between Three, Vodafone and Eir |
| Identity rule | No law requires documents; vending machines and shops sell with none | No document at all |
| Best for | Stays over a month, or anyone who needs a local number | Trips of days to weeks, and anyone who wants to be online on landing |
For an ordinary holiday the sums point one way. A local prepaid plan charges in euro per top-up and ties you to one network; a travel eSIM buys data at wholesale and lets the device move between networks. Where the carrier wins is a real Irish number and unlimited domestic calling, which only matters once you live in or settle in Ireland.
💡 A multi-network eSIM profile is the practical middle path: Roami’s Ireland eSIM keeps the convenience of instant delivery, switches automatically between Three, Vodafone and Eir, and still lands you on Three in Dublin and Vodafone in Connemara without buying twice.
Will my phone work with an Irish eSIM?
Three things decide whether your phone works on an Irish carrier: its bands, its lock status, and a short list of device-specific quirks. All three are covered below.
Is your phone eSIM-capable for Ireland?
Irish carriers build their 4G on specific bands and their 5G on a narrow slice. The rural backbone is Band 20 at 800 MHz, with newer low-band help from Band 28 at 700 MHz for 5G. Vodafone and Eir hold the heaviest Band 20 investment along secondary and regional roads, which is exactly why they reach the western coast better than raw speed numbers suggest. Cities and larger towns add Band 3 at 1800 MHz and Band 1 at 2100 MHz for capacity, and 5G sits almost entirely on n78 at 3500 MHz, a band whose signal rarely travels more than two or three kilometres from a mast.
| Band | Frequency | What it does for your trip |
|---|---|---|
| Band 20 (LTE) | 800 MHz | The rural backbone; carries signal around coastal headlands and through western valleys |
| Band 28 (5G) | 700 MHz | Newer low-band 5G that reaches further than n78 in the countryside |
| Band 3 (LTE) | 1800 MHz | City and town capacity |
| Band 1 (LTE) | 2100 MHz | Capacity in suburban corridors |
| Band 7 (LTE) | 2600 MHz | Extra city capacity |
| n78 (5G) | 3500 MHz | Fast 5G in cities only; signal rarely reaches 3 km from a mast |
Nobody has to study band charts for a trip to Ireland. The safe route is matching your exact model number, not the shop label, against eSIM device checker. The behind-the-scenes version of that handshake lives in what happens during eSIM activation, if you want it before you buy.
Does your handset do eSIM in Ireland?
A locked phone is the most common reason an Ireland eSIM install simply fails. Ireland has no national lock rule of the kind Canada or Japan enforces, so the lock status depends entirely on whichever operator originally sold the handset.
Path: Settings -> General -> About -> Carrier Lock on iPhone. “No SIM restrictions” on screen means nothing stands in your way. “SIM locked” on the screen blocks every third-party profile until it is lifted.
Fix it: only the original seller can lift the lock, so start there rather than with a local shop. Handsets out of contract are typically released within a day and without a fee. Only then try installing your eSIM.
If you bought a used phone, or a phone from a US or European carrier, assume it may be locked and check before you fly.
IMEI and EID: what Ireland asks for
| Device | Symptom | What to do |
|---|---|---|
| Mainland-China iPhone models | No “Add eSIM” option at all, the hardware is disabled in that market | Not fixable; use a physical SIM or another device |
| Carrier-purchased Samsung | eSIM greyed out in settings | Ask the carrier to unlock it first, then reboot |
| International handset without Band 20 | Fast in towns, LTE drops in the rural west | Expected behaviour; lean on Vodafone or Eir, or use a multi-network eSIM |
| Phone that only used Vodafone 3G | Loses service, because Vodafone switched 3G off between 2023 and 2024 | Use a 4G or 5G device |
| Dual-SIM users | eSIM installed but no data | Set the eSIM as the line used for mobile data |
From here on, the variables come from your device rather than from Three or Eir. Run the handset compatibility checker on your exact handset before you commit to anything.
How to buy a tourist eSIM from Three, Vodafone or Eir
Four routes exist, and they differ more in paperwork than in price: Three’s visitor eSIM, Vodafone’s and Eir’s tourist plans, and the budget brands that ride their networks. Each route, step by step:
Where Ireland eSIMs are sold
Three is the network you want for speed, and it sells a visitor product built for exactly this. Its “Visit Ireland” eSIM comes in two flavours: 5GB over 7 days for 15 euro, or 25GB over 28 days for 25 euro. Both activate instantly online with no physical SIM and no store visit.
Three Visit Ireland, step by step:
- Open the Three Ireland tourist page and choose a Visit Ireland eSIM plan.
- Pay by card or PayPal; there is no credit check and no Irish address.
- On compatible devices the eSIM activates automatically during setup, with no QR code needed. If your device does not support automatic activation, Three emails a QR code to scan.
- Top up to activate the allowance; the plan runs from that moment.
One catch that trips people up: the Visit Ireland allowance is for use only in the Republic of Ireland, per Three’s own terms. If your trip crosses into Northern Ireland, this plan will not cover you there. For ordinary Republic-only travel it is excellent; for an all-island trip, read the Northern Ireland section below.
Local SIM vs travel eSIM: Ireland edition
Vodafone was the first Irish operator to support eSIM, and its tourist path is clean. The “Data Unlimited 5G” prepay plan gives unlimited 5G data plus 100 any-network minutes and texts for a 20 euro top-up every 28 days, activated online using eSIM before or after you arrive.
Vodafone tourist eSIM, step by step:
- Order the Pay as you Go tourist eSIM on the Vodafone Ireland site.
- Set up the eSIM; compatible phones activate automatically, others get a QR code.
- Top up 20 euro to activate the plan when you land.
- New My Vodafone accounts also get 10 euro in free credit after registration.
Vodafone posted the highest Consistency Score in Ookla’s H2 2025 data at 83.5, so it is a steady choice, but note it had the lowest 5G Availability at 58.7 percent, meaning you spend more time on 4G than on Vodafone 5G.
Ireland eSIM data plans and rates
Eir owns its own network and markets itself on 5G coverage, and it sells a straightforward tourist eSIM with unlimited 5G data and unlimited calls and texts for 20 euro per 28 days, activated online using your phone’s IMEI before you land.
Eir tourist eSIM, step by step:
- Choose the Eir tourist eSIM on the Eir site or in the app.
- Enter your IMEI; the profile is prepared before travel.
- Install the eSIM on Wi-Fi at home, then it connects on arrival.
- No store visit, no identity document, no contract.
Eir leads Ookla’s H2 2025 5G Availability at 82.6 percent, the highest of the three, which is why it is a strong rural and small-town pick even though its Speed Score of 53.36 trails Three.
Three eSIM plans for visitors
- IMEI — dial
*#06# - EID — also from the
*#06#screen; this is the eSIM’s own identifier - A card that works in Ireland — online checkouts take international cards and PayPal
- An email address — the eSIM QR or activation link arrives there
- Wi-Fi — install the profile before you fly, not at the airport
- No passport required — unlike most countries, Irish prepaid eSIMs need no identity document to buy
Plans and current tiers live on our Ireland eSIM page. Set the profile up before departure; it should wake the moment you land.
How do your eSIM speeds and coverage compare across carriers?
What follows depends on two things: measured network performance where you will be, and the kind of trip you have planned. Measurements below cover the first; the trip-type and provincial tables cover the second.
Three vs Vodafone: which Ireland carrier is faster?
All figures below come from Ookla’s Speedtest Connectivity Report for Ireland, collection period July to December 2025, using the carrier-level data supplied for this guide. The full report is the Ireland Speedtest Connectivity Report H2 2025.
| Metric | Three | Vodafone | Eir |
|---|---|---|---|
| Speedtest Connectivity Score (Best Mobile Network) | 74.84 | 69.26 | 71.27 |
| Speed Score (Fastest Mobile Network) | 60.22 | 49.15 | 53.36 |
| Consistency Score | 82.8 | 83.5 | 82.2 |
| 5G Availability | 74.7% | 58.7% | 82.6% |
| Video Streaming Score | 83.7 | 83.47 | 83.31 |
| Game Score (Best Mobile Gaming) | 89.04 | 87.3 | 86.33 |
| 5 Star Rating (Top Rated) | 3.04 | 2.76 | 2.62 |
Where the report also publishes median speeds, the picture is consistent with the table above. Three recorded a median download of 82.44 Mbps across all technologies and a median 5G download of 139.87 Mbps, with 10.15 Mbps upload and 38 ms latency on all technologies. Eir’s median download across all technologies was 52.85 Mbps. Vodafone’s median 5G download was 81.5 Mbps. Each figure comes from that single Ookla report.
Two things worth noticing: Vodafone leads on Consistency yet trails badly on 5G Availability, so you get a steady 4G experience but less time on 5G, and Eir’s win is 5G reach, which matters precisely in the towns and smaller settlements where you least expect a 5G icon.
The right Ireland eSIM for each trip
| Your plans | Go-to carrier | What makes it the pick | Watch out for |
|---|---|---|---|
| City break — Dublin, Cork, Galway | Three | Fastest median download at 82.44 Mbps and best Speed Score | Dublin city centre congests at peak times |
| Rural west — Connemara, Donegal, Kerry | Vodafone or Eir | Best reach on the Band 20 low band; Eir leads 5G Availability | Genuine gaps remain off the main roads |
| Video, streaming, gaming | Three | Best gaming score at 89.04 and video at 83.7 | Upload is not the fastest of the three |
| Business travel and calls | Any carrier direct | A real Irish number and unlimited calls | Travel eSIMs are data-only, no local number |
| All-island — Dublin plus Belfast | A UK and Ireland travel eSIM | One plan covers both jurisdictions | A single Republic plan stops at the border |
| Budget longer stay | GoMo on Eir or 48 on Three | Cheap unlimited, but 48 ships a plastic SIM | 48 has no eSIM on standard plans |
Three vs Vodafone: coverage compared
Ireland’s coverage follows population: dense in the cities and along the main roads, thinning fast along the remote Atlantic edge. The Wild Atlantic Way, a 2500 kilometre coastal route from Donegal to Cork, is the clearest example, because it strings together well-covered towns and some of the most signal-hostile terrain in Western Europe.
| Area | Coverage reality | Best carrier | Watch out |
|---|---|---|---|
| Dublin and the east | Dense 5G; the M50 and DART line are covered | Any, Three fastest | Congestion in the city centre at peak |
| Cork and the south coast | Good in cities; coastal back roads are hit and miss | Vodafone | West Cork peninsulas thin out |
| Galway and Connemara | Main N59 roads covered; bog roads patchy | Three or Vodafone | Connemara interior has real gaps |
| Wild Atlantic Way, Donegal to Cork | Towns good; remote coastal and mountain roads thin or absent | Three or Vodafone | Download offline maps for the whole route |
| Aran Islands | Reasonable 4G, Three strongest of the three | Three | Ferry crossings between islands lose signal |
| Kerry peninsulas — Dingle, Iveragh, Beara | Main roads fine; passes like the Conor Pass degrade signal | Vodafone | Mountain passes drop to nothing |
The remote stretches are the point of the route, so plan for them. A profile on Vodafone or Three covers the towns and the busier sections; comprehensive offline maps carry you through the bog roads, the headlands and the ferry gaps where no network fully reaches.
What changes when you cross into Northern Ireland
Northern Ireland is part of the United Kingdom, so it uses UK networks, EE, Vodafone UK, O2 and Three UK, not Irish ones. Since Brexit, the EU “Roam Like at Home” rule no longer covers Northern Ireland, and that creates the single most common coverage confusion visitors face on the island.
| Your plan | Works in Northern Ireland | What to know |
|---|---|---|
| Three Visit Ireland tourist eSIM | No — Republic of Ireland only | Three’s own terms limit the allowance to the Republic |
| Three Ireland pay as you go | Partly — about 0.14 cents per MB unless you buy a daily roam pass | Border masts often hand you to an UK network |
| Vodafone Ireland pay as you go | Usually yes — home data allowance applies in the UK | Confirm on your specific plan |
| Eir prepay | Yes — Roam Like Home in the UK, then about 1.99 euro per 100MB per day after the allowance | Check before relying on it |
| A UK and Ireland travel eSIM | Yes — one plan covers both sides of the border | Cleanest choice for an all-island trip |
Most Irish operators voluntarily keep Republic-to-Northern-Ireland roaming free on their main plans, but a prepaid tourist plan like Three’s Visit Ireland is explicitly Republic-only, and Three pay-as-you-go charges per megabyte in the UK without a roam pass. The clean answer for a Dublin-plus-Belfast trip is a regional plan that treats both jurisdictions as one, so your phone never notices the open border. One local quirk worth knowing: calls from the Republic to Northern Irish landlines can be dialled with the 048 prefix to be charged at domestic rates.
Planning a route that leaves Ireland? Start with eSIM for the United Kingdom, or compare a Europe eSIM if your trip crosses several countries.
This only works cleanly when network selection stays on automatic. A profile that can move between Three, Vodafone and Eir covers the provincial and border gaps that any single-carrier plan cannot.
How do I set up the APN for an Irish eSIM?
APN values rarely need attention, and precisely because of that they get overlooked when data stops working. Below are the settings for each Irish network, for whenever manual entry is unavoidable, plus the precise menu routes.
APN values for Three, Vodafone and Eir eSIMs
You will only need these if you bought a SIM or eSIM directly from an Irish carrier. On a travel eSIM the APN is preloaded, so resist the urge to edit it.
| Carrier | APN | Username | Password |
|---|---|---|---|
| Three Ireland | internet |
blank | blank |
| Vodafone Ireland | internet |
blank | blank |
| Eir | data.myeirmobile.ie |
blank | blank |
Leave username and password empty. Eir’s value is taken from Eir’s own support pages; Three and Vodafone use the standard Irish default that their profiles normally load automatically. If a carrier requires a different value, the activation instructions that came with your profile will state it.
APN settings for Ireland carriers
- An older handset that doesn’t pick up carrier settings on its own
- A profile installed via manual activation code rather than a QR scan
- A carrier-issued prepaid eSIM where automatic configuration did not run
- Almost never on a travel eSIM, which is the point of a managed profile
Manual APN: when Ireland needs it
- iPhone: Settings → Cellular, select the eSIM line → Cellular Data Network → type in the APN
- Android: Settings → Connections → Mobile Networks → Access Point Names → add a new APN
After saving, restart the phone. If nothing loads, first make sure the eSIM is the chosen data line rather than your usual SIM.
How to activate an Irish eSIM and fix problems
One pass through this section takes you from a clean install to a working connection, and covers the failure patterns an Irish network can actually produce, in the order you will hit them.
Problem handsets for Ireland eSIMs
| # | Check | What “good” looks like |
|---|---|---|
| 1 | Phone is not carrier-locked | About screen lists Carrier Lock: “No SIM restrictions” |
| 2 | Phone supports eSIM | *#06# shows an EID, or the compatibility page confirms your model |
| 3 | QR code and activation code saved | Screenshot stored on the phone and in cloud storage |
| 4 | Profile installed before departure | Install on Wi-Fi at home; the profile connects when you land |
| 5 | Data line and roaming set | eSIM selected for mobile data, data roaming on |
Do step 4 at home. Dublin Airport and the arrivals halls have congested Wi-Fi exactly when you need it most, and a profile you install on the ground competes with everyone else’s.
The Ireland eSIM install process
Every tap of the install, from Add eSIM to enabling roaming, is shown in the activation how-to guide. What differs by carrier:
- Three: the Visit Ireland eSIM activates automatically on compatible devices, or by emailed QR code on others; top up to start the allowance
- Vodafone: the tourist eSIM is issued after checkout and activates on install; a 20 euro top-up starts the plan
- Eir: the tourist eSIM is prepared from your IMEI and activates on arrival
- Budget brands: GoMo and Lycamobile issue an eSIM in their app or by email; 48 and Tesco Mobile send a physical SIM instead
- Travel eSIMs: install by QR code, and the same profile roams onto whichever of Three, Vodafone or Eir is strongest
Four fixes when your Ireland eSIM fails
General activation errors, a profile that will not download, a scan that fails, an eSIM that installs but never registers, are covered in our eSIM activation error guide. Ireland has its own set of four patterns, listed below.
A. The eSIM will not install
- Open About settings and confirm Carrier Lock displays “No SIM restrictions”
- Guard the QR code from scratches and re-scans, since most expire after a single use
- One call to the operator can confirm whether the profile is waiting in a pending state
B. Installed, but no signal bars
- Re-check the lock status
- Settings → Cellular → Network Selection → select Three, Vodafone or Eir manually instead of automatic
- Reset network settings and start the phone again
C. Signal bars, but no internet
- Compare each field with the table above before saving
- Double-check that the eSIM, not your everyday SIM, holds the data-line role
- Check you have not exhausted your allowance; some unlimited plans throttle after a fair-use cap
D. You crossed into Northern Ireland and lost service
- If you are on a Republic-only tourist plan such as Three Visit Ireland, this is expected; open a UK-and-Ireland plan or a local UK eSIM
- If you are on Vodafone or Eir pay as you go, confirm roaming is enabled and the plan includes UK use
- On a travel eSIM, confirm the plan region covers the UK, not just the Republic
- As a last resort, remove the profile and reinstall from a fresh QR code
What to gather before you contact support in Ireland
| The basics | Where to find it |
|---|---|
| Order or account number | Confirmation email |
| Phone model and OS version | Settings → About |
| EID | *#06# |
| Screenshot of the error | Take it before the screen changes |
| Current APN settings | Settings → Cellular Data Network |
| Data roaming status | Settings → Cellular → your eSIM line |
| Steps already tried | Keep a short list |
The Ireland eSIM questions travellers ask most
Can visitors buy a prepaid eSIM from Three Ireland?
Yes, and it is the simplest of the three. Three’s Visit Ireland eSIM gives 5GB over 7 days for 15 euro or 25GB over 28 days for 25 euro, activates instantly online with no physical SIM, no store visit and no identity document. The one limit is that the allowance is for the Republic of Ireland only, so it will not cover Northern Ireland.
Does Vodafone Ireland sell a tourist eSIM?
Yes. Vodafone’s Data Unlimited 5G prepay plan gives unlimited 5G data plus 100 any-network minutes and texts for a 20 euro top-up every 28 days, and it activates as an eSIM online before or after you arrive. Vodafone was the first Irish operator to support eSIM, and it posted the highest Consistency Score in Ookla’s H2 2025 data, so it is a steady choice where raw 5G speed matters less than a reliable connection.
Is Eir a good eSIM choice for a short visit?
For a short visit Eir is a strong pick if your route leaves the cities. It led Ookla’s H2 2025 5G Availability at 82.6 percent, the highest of the three, and its tourist eSIM gives unlimited 5G data and unlimited calls and texts for 20 euro per 28 days, activated online from your IMEI. Its Speed Score of 53.36 trails Three, so central Dublin will feel faster on Three, but small towns and the west favour Eir’s reach.
Which budget brand has the best eSIM for travellers?
Among the cheap brands, GoMo and Lycamobile both issue eSIMs, while 48 and Tesco Mobile ship a plastic SIM only. GoMo is Eir’s app-only brand at 12.99 euro per month for unlimited data, best for a stay over a month; Lycamobile is Eir-based at 12.99 euro per 28 days and suits callers wanting cheap minutes. If your phone has no SIM tray, avoid 48 and Tesco Mobile and use GoMo, Lycamobile or a travel eSIM instead.
Will a photocopy of my passport work in Ireland?
No. Ireland has no mandatory SIM registration, unlike Germany, Japan or many other countries, so you can buy a prepaid SIM or eSIM from a vending machine, a supermarket or an app with no identity document at all. Some network stores may ask for photo ID as a shop policy for an in-store activation, and online checkouts want a card and an email, but the law does not require it. Travel blogs that say every provider demands a passport are describing other countries, not Ireland.
Will my Ireland eSIM work in Northern Ireland?
It depends on the plan. Northern Ireland uses UK networks, and since Brexit the EU roaming rule does not cover it. Three’s Visit Ireland tourist eSIM is explicitly Republic-only, so it stops at the border; Vodafone and Eir pay-as-you-go plans usually include UK use but check the terms; and a UK-and-Ireland travel eSIM covers both sides under one plan. For a Dublin-plus-Belfast trip, a regional plan is the clean choice.
Ireland: the carrier lineup
Vodafone and Three reach furthest along the western seaboard, because both invest heavily in the Band 20 low band that carries signal around coastal headlands and through valleys. Eir is strong in Kerry and West Cork on its legacy backhaul. No network fully covers the remote stretches, so pair a Vodafone or Three eSIM with offline maps rather than trusting live signal on the bog roads and mountain passes.
Which network is best in Ireland?
The Aran Islands have reasonable 4G, with Three the strongest of the three, but the ferry crossings between them and the mainland lose signal, and the smaller islands thin out away from the villages. Connemara’s problem is its blanket bog and granite: masts sit far apart along the N59, so the moment you turn onto a single-track coastal loop the signal fades or vanishes. Download offline maps before you go, because navigation in those gaps depends on them.
How do I check my phone supports an Ireland eSIM?
Check both lock status and eSIM support in one pass with the eSIM compatibility page, which covers EID support and the Band 20 question for rural reach. If you want the install theory first, read how an eSIM profile installs. Most iPhone XS and newer, Pixel 3 and newer, and Galaxy S20 and newer handsets qualify.
What if my Ireland eSIM will not connect?
Work the Ireland-specific patterns above in order, lock status, network selection, APN and data line, then the Northern Ireland check, and if it still fails the wider error catalogue in activation error troubleshooting guide covers the rest. Support replies faster when the EID, order number and an error screenshot are already attached.
Which Ireland carrier should you pick: Three vs Vodafone?
Yes. A quality travel eSIM on Irish networks connects to whichever of Three, Vodafone or Eir is strongest at your location and moves between them as you travel, which is exactly what you want on the Wild Atlantic Way where no single carrier covers every stretch. Direct carrier eSIMs stay on one network for their whole life.
What is an eSIM and how does it behave inside your handset?
Under the hood, an eSIM is a chip fixed inside your handset that can hold several carrier profiles in place of one plastic card. In practice the network ships a profile, the handset stores it on the internal chip, and the line works like any other. For the full chain, SM-DP+ servers included and the reason the QR code dies after one scan, see eSIM activation mechanics.
More questions? View the full FAQ →
Documentation we used for the Ireland eSIM comparison
- Ookla Speedtest Connectivity Report — Ireland, July to December 2025 — the per-carrier report backs every carrier-level figure here: Three’s 74.84 connectivity score and 60.22 speed score, Vodafone’s 83.5 consistency, Eir’s 82.6 5G availability, and the median download speeds of 82.44 Mbps for Three and 52.85 Mbps for Eir.
- Ookla Speedtest Global Index — the Ireland entry carries the national median mobile download and world ranking, refreshed monthly.
- Commission for Communications Regulation (ComReg) — the official telecoms regulator publishes the spectrum allocations and coverage maps referenced for the Irish band plan and the rural low-band explanation.
- Cable.co.uk worldwide data pricing — the full country table carries Ireland’s per-gigabyte price, about 1.50 US dollars, ranking it among the cheaper markets in Europe.
- Three Ireland, Vodafone Ireland and Eir — Three’s eSIM page, Vodafone’s tourist eSIM page and Eir’s support pages are the references for plan prices, delivery methods and the identity-free purchase rule quoted above.
Third-party measurements only. Expect variation by phone model, by the band in use, and by how busy the local site is.
Get your Ireland eSIM ready before you fly
Set the profile up before you leave and it wakes on landing, moving between Three, Vodafone and Eir wherever your route goes. New customers can claim a free Ireland trial first, or get 20% off Ireland eSIM plans with code WEB20.
Introductory offer for new customers
A closing note from Roami: travellers who test coverage first rarely regret it. Go claim a test eSIM — it mirrors the local setup on Three — and code WEB20 takes 20% off a paid Roami plan whenever you are ready.
