Match Three's visitor bundles to the trip
At the time of checking, Three listed Visit Ireland 5GB at €15 for seven days, with 50 minutes for calls in the Republic of Ireland. Its Visit Ireland 25GB cost €25 for 28 days and included 250 minutes or texts plus 50 international minutes. Three advertises immediate eSIM access, and says a compatible phone can activate online without visiting a shop. A new Irish number comes with the eSIM, which can sit alongside a home line on many dual-SIM phones.
Three says one top-up of at least the bundle price starts its benefit period. Repeating a full-price top-up during that period starts a new period and unused allowances are not carried over. The page labels the data allowances as Ireland and EU data, but its terms also state that all allowances are for use only in the Republic of Ireland. Those statements need clarification from Three before relying on this visitor bundle abroad. Its site names a WHSmith shop in Dublin Airport Terminal 1 and SIM vending machines in Terminals 1 and 2 for physical cards.
Order Vodafone eSIM or buy on arrival
Vodafone says visitors can order a pay-as-you-go eSIM before travelling, set it up, and top up when they arrive. Its Data Unlimited 5G offer showed €20 every four weeks at the time of checking, with unlimited data and a published allowance of 100 any-network minutes, texts and international minutes. Vodafone says the full plan amount must be added in one transaction to start 28-day benefits. A full-price top-up during that cycle resets allowances, so a smaller increment may suit someone merely adding credit.
Vodafone lists a WHSmith shop in Dublin Airport Terminal 1, machines in both terminals and shops around Ireland for physical SIMs; it warns that airport plan prices can vary. Its eSIM instructions require a compatible device and a Wi-Fi connection for installation using account details or a QR code. Dublin Airport publishes a free Wi-Fi network named Dublin Airport Wi-Fi that needs no registration. Connect and complete installation before leaving the terminal if the mobile profile has not activated.
Use ComReg's map and check the handset
ComReg's outdoor mobile coverage guidance directs readers to its predicted network map, which distinguishes providers and 2G, 3G, 4G and 5G service. Search the accommodation's Eircode and stops outside Dublin before choosing an operator. An outdoor prediction does not establish indoor reception or guarantee service on a narrow road through a valley. Compare the relevant map layer for the exact provider; a large national footprint says little about the cottage, trailhead or ferry port on the itinerary.
ComReg reported in August 2026 that Eir planned a phased 3G shutdown beginning in October 2026; it said GoMo and Lyca Mobile users on Eir's network would also be affected. The regulator expected 4G- or 5G-capable devices generally to avoid an issue, while older 3G-only devices may need replacement or changed settings. This matters for a spare handset brought to Ireland for navigation. Check that a phone is unlocked, supports the chosen network's modern service and can install eSIM before ordering an electronic profile.
Separate EU roaming from the Northern Ireland border
The European Commission includes Ireland in the EU roam-like-at-home area, so an eligible EU or EEA home plan generally uses domestic charging when visiting Ireland, subject to the plan's fair-use terms. Check the home operator's data allowance before buying a second line. A local Irish visitor pack has its own terms: do not assume it gives identical EU roaming solely because an operator headline mentions EU data. If the trip includes several EU countries, confirm the actual published allowance and eligibility with the Irish operator.
Northern Ireland is in the United Kingdom, outside the EU roaming entitlement. ComReg warns that a phone near the border can attach to a network in another country without the traveller deliberately crossing, creating an unexpected roaming charge depending on the home provider. Its advice is to check the provider's UK policy and consider manual network selection in border areas. ComReg also notes that satellite networks on aircraft and some ferries fall outside ordinary EU terrestrial roaming rules; check the connection before using mobile data at sea.
Plan DART, InterCity and live departures
Transport for Ireland's TFI Live app provides door-to-door journeys and live departures for Dublin Bus, Bus Éireann, Luas and Irish Rail, along with maps and timetables. It is particularly useful when arriving in Dublin without knowing whether the next connection is a bus, tram or train. Irish Rail identifies the coastal DART route through Dublin from Howth and Malahide towards Greystones, while its InterCity network links the larger towns and cities. Save a route before entering an area with uncertain reception.
Irish Rail advertises free Wi-Fi on its trains and gives Irish Rail - WiFi as the InterCity network name; its Enterprise service towards Belfast uses NI Railways WIFI. Those facilities can help check a connection after boarding, but the operator's Wi-Fi announcement does not establish continuous internet along every rail section. Download the ticket and any transfer instructions in advance. The Belfast service also moves into UK territory, so the mobile line's roaming status can change even while the train's Wi-Fi remains visible.
Set data and calling lines deliberately
Three explicitly says its visitor eSIM brings a new Irish number and can be used alongside an existing number on many dual-SIM phones. If the home number receives bank or travel alerts, leave it available for those messages while assigning mobile data to the intended Irish or travel line. Vodafone's installation instructions also make clear that an eSIM is a profile on a compatible device, so check the exact handset rather than assuming every model variant supports it. Test a webpage, a message and any needed ordinary call after activation.
When topping up, distinguish a tariff renewal from extra credit. Three's full-amount top-up starts a new period, and Vodafone similarly says its full-plan top-up can reset allowances before the previous period ends. Record the activation date and use the operator account to check remaining allowances before a long drive or rail journey. If you only need mobile data, our Ireland plan page provides another set of choices to review before departure; a data-only product does not provide an Irish calling number.
Save Ireland's emergency numbers
Ireland's Health Service Executive says to call 112 or 999 for a serious emergency, and that both numbers are free from any phone. Give the call taker the location and, if known, the Eircode so the service can find the right address. The numbers are voice-call routes. A cited source does not establish that a data-only eSIM can itself place such a call, so keep a working voice-capable line or another phone available rather than relying only on internet access.
For the first day, save the airport-to-accommodation address before the flight and note the operator's setup instructions. Dublin Airport's Wi-Fi offers a place to install an eSIM, but confirm mobile data before leaving for the onward journey. If travelling towards the Northern Ireland border, check both the home and Irish line's UK roaming rules while still connected. This avoids having to resolve a top-up, coverage issue or network switch when the phone is already showing an unfamiliar carrier.
Networks our Ireland plans use
These are the operators named on our plans for Ireland, taken from the plan data, so the list follows the catalogue.
- 35G
- Eir5G
- Eircom Limited5G
- Meteor5G
- METEOR5G
- Meteor Mobile Telecommunications Ltd.5G
- Three Ireland5G
- voda IE5G
- Vodafone5G