Dublin: excellent coverage, and one date that ruins it

Half the people reading this should buy nothing

Ireland is in the EU, so an EU or EEA SIM roams here at home rates on your home allowance. If you are flying in from Berlin, Madrid or Warsaw, close this page — you are already sorted. British visitors need to check their own operator, because post-Brexit roaming terms vary by network and some have reintroduced charges. Everyone else needs something, and Dublin is about the easiest place in Europe to need it.

Dublin does not have a coverage problem

This is the honest summary: there is nothing here to plan around. Trinity College, Temple Bar, Grafton Street, the Guinness Storehouse — all excellent. Ireland averages around 65 Mbps, Three has 94%+ 5G coverage and the fastest average speeds in the country, and Eir reaches 99% of the population with 5G. Dublin is where all of that is at its strongest.

The Grand Canal Dock area, the Silicon Docks, is a step above even that. European headquarters for Google, Meta, Airbnb and LinkedIn sit in a few square blocks, the infrastructure investment followed them, and the result is some of the densest connectivity in Europe. It is a nice fact rather than a useful one — you will not notice the difference between excellent and exceptional while checking a bus time.

Which is the point. Unlike Galway or Killarney, where the drive out of town changes the calculation entirely, a Dublin-only trip needs the smallest plan you can find and no thought about which network it uses.

The exception is St Patrick's Day

17 March brings crowds on a scale the network was not built for, and O'Connell Street and the parade route see major congestion for the day. This is a capacity problem, not a coverage one, so buying a bigger or more expensive plan does not fix it. Agree a meeting point before you go out, and screenshot your tickets.

Bloom at Phoenix Park in May or June and Electric Picnic in September are the other dates that move large numbers of people around, though neither concentrates them into a single street the way the parade does.

Apps worth having before you land

TFI Live for real-time public transport, and a Leap Card for actually paying for it. Uber, Free Now and Bolt all operate here, and Free Now is the one that reliably surfaces ordinary taxis. All of them want a live connection, which is a minor argument for a slightly larger plan than a pure maps-and-messaging estimate suggests.

What to buy

Airalo's Irish prices were read from its own site on 13 August 2026 and Nomad's from its own on 17 August 2026. The Saily row is a listing we hold rather than a checkout we watched. Airalo sells its Irish plan as Fáilte, which is a product name and not a carrier — it does not publish which Irish network the plan connects to, and neither does Saily.

For a long weekend, 1 GB to 3 GB is the realistic number, which puts the whole trip at $4.00 to $7.50. There is no reason to buy more unless you are heading west afterwards.

Buying on the ground is easy in Ireland — no ID is required, so it is genuinely an instant purchase — but a local SIM runs about $20 at the airport, against $4 for a small eSIM installed before you fly. The counter only makes sense if you want an Irish number.

Coverage detail for the rest of the country is on our Ireland hub.