Compare Mobile SIM Plans in Ireland

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51 live offers compared from 15 providers, from €5 /month. Updated daily.

What is a mobile SIM in Ireland?

A mobile SIM plan gives you calls, texts and mobile data on one of Ireland's networks, either on a rolling 30-day SIM-only deal, a prepaid top-up plan or a bill-pay contract that may include a handset. SIM-only plans have become the default for value-focused Irish consumers because they separate the cost of the phone from the cost of the service, letting you keep an existing handset and switch provider whenever a better price appears.

How the Irish market works

Ireland has three network operators that own infrastructure — Vodafone Ireland, Three Ireland and Eir — plus a wide field of virtual operators (MVNOs) that ride on those networks. An Post Mobile, Tesco Mobile, iD Mobile, Lebara, Sky Mobile and Virgin Media all resell capacity from one of the big three. Number portability is free and usually completes within one working day, and eSIM support is now widespread, so moving between providers is quick.

Benefits

No lock-in — 30-day SIM-only plans let you leave or switch whenever prices change.

EU roaming included — under Roam Like At Home your Irish allowance works across the EU at no extra cost.

Keep your number — free porting means switching provider does not mean losing your mobile number.

Unlimited data tiers — most networks now offer genuinely unlimited or very large data bundles at competitive monthly prices.

How to choose

Start with coverage: check the operator's map for your home, work and commute, as rural and mountainous areas differ sharply between Vodafone, Three and Eir. Then match a data allowance to your usage — light users manage on a few gigabytes, while streamers want unlimited. Weigh contract length against price, confirm 5G is included if your handset supports it, and check whether calls to the UK and international destinations are bundled if you need them.

Leading providers in Ireland

Vodafone Ireland and Three Ireland dominate bill-pay and offer the widest 5G reach. Eir competes on bundle pricing, often paired with home broadband. Among value operators, An Post Mobile, Tesco Mobile and iD Mobile focus on low-cost SIM-only plans, while Lebara targets international callers and Sky Mobile and Virgin Media reward existing TV and broadband customers with discounts.

What it costs

Entry SIM-only plans start around €5 per month for small prepaid bundles, with mid-range unlimited-data SIM-only deals typically €15 to €25 per month. Bill-pay plans bundled with a handset can run up to roughly €200 per month at the premium end when the phone cost is spread across the contract. Prepaid users pay only for the top-ups they choose.

Protections and regulation

The Commission for Communications Regulation (ComReg) oversees mobile services in Ireland, setting rules on switching, number portability, billing transparency and roaming. ComReg operates a formal complaints process if a provider fails to resolve an issue, and EU roaming caps limit what you pay when travelling within the EU. Contracts must clearly state price, term and any early-exit charges.

Common questions

Can I keep my number when I switch? — Yes, porting is free and normally completes within one business day once you give your new provider your porting code.

Is 5G widely available? — 5G is live across most Irish cities and towns on Vodafone, Three and Eir, with coverage still expanding in rural areas.

Does my plan work abroad? — Within the EU your allowance works under Roam Like At Home; outside the EU, roaming charges or a travel eSIM apply.

Mobile SIM Plans in Ireland — FAQ