Most trips to Ireland start in Dublin and head west: Galway and Connemara, the Cliffs of Moher, the Ring of Kerry and the long coastal route known as the Wild Atlantic Way. Many visitors also cross to Belfast and the Causeway Coast. With an EU SIM, the Republic of Ireland is covered by Roam Like at Home. Visitors with an American, Canadian or Asian SIM usually pay roaming by the day.
The border with Northern Ireland is the part to plan for: there are no checkpoints, but it is where EU roaming ends.
Key facts for Ireland
- EU roaming: covered by Roam Like at Home
- Local networks: eir, Three, Vodafone (depending on the plan)
- Emergency numbers: 112 or 999
- Embassies: in Dublin
The border with Northern Ireland
Northern Ireland is part of the United Kingdom, which is outside EU roaming since Brexit. The border has no checks, and phones can switch to a UK network without warning, sometimes even on the Irish side in Donegal, Monaghan or Louth. EU plans may charge for UK roaming, and a travel plan for Ireland alone does not cover Belfast; for a trip to both, a regional Europe plan covers the two.
Dublin
A Leap Card pays for Dublin's buses, the Luas tram and DART trains at lower fares than cash, and you can top it up from your phone. Coverage is strong across the city, and express buses link the airport with the centre.
The Wild Atlantic Way
Along the west coast, coverage is good in towns and patchy on remote peninsulas, mountain passes and islands such as the Aran Islands or Achill. Boat trips to Skellig Michael and the islands depend on the weather. Download maps before driving, tell someone your route in the mountains of Kerry or Connemara, and for emergencies in the hills or at sea call 112 or 999 and ask for mountain rescue or the coast guard.
Driving: the M50 toll
The M50 motorway around Dublin has a toll with no barriers or booths, and it must be paid by 8 pm on the following day: online, by phone or at a Payzone shop. Some rental companies include it in your bill, others leave it to you, so check your agreement.
Paying
Cards and phone payments are accepted almost everywhere, including in pubs and most taxis. Dublin's buses do not take bank cards yet, so get a Leap Card.
Getting connected
EU SIM: the Republic counts as home for roaming; Northern Ireland does not. A travel eSIM helps if your tariff includes little data abroad.
SIM from outside the EU: set up a travel eSIM before you fly; it activates with its first connection in Ireland, while your usual number stays reachable for texts and bank codes.
Irish prepaid SIMs are sold in phone shops and convenience stores.
Consular protection: who to call in Ireland
- 112 and 999 both reach the Gardaí (police), an ambulance, the fire service, mountain rescue and the coast guard.
- Embassies are in Dublin. The Telcomia app shows yours, with address and phone.
Questions travellers ask about Ireland
Does my EU plan work in Northern Ireland?
Not under EU rules: Northern Ireland is in the UK, and your operator may charge roaming there.
Is the emergency number 999 or 112?
Both work, from any phone.
Which networks does a Telcomia eSIM use in Ireland?
eir on most plans, and Three or Vodafone on some, with 4G and 5G where available.
How do I pay the M50 toll?
By 8 pm on the day after you pass, online, by phone or at a Payzone shop, unless your rental company handles it.
The short version
From the EU, your plan covers the Republic but not Northern Ireland; from outside the EU, install a travel eSIM before you fly. Pay the M50 toll by 8 pm the next day, download maps for the west coast, and save 112.
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