Choosing a mobile plan in Ireland used to be simple: pick a network, hope for decent signal. Today, the unlimited data market is a different game – prices range from €12.99 to €20, and fine print like fair usage caps and deprioritization means the best deal depends on how you actually use your phone.

4 related posts

Cheapest unlimited SIM only plan: €14.99/month (Eir) ·
Vodafone Ultra SIM only price: €20/month ·
Networks offering unlimited data: 3, Eir, Vodafone, GoMo, Tesco Mobile ·
Average unlimited plan cost: €17-25/month ·
5G unlimited availability: All major networks ·
Typical fair usage cap: 50-100 GB per month

Quick snapshot

1Confirmed facts
2What’s unclear
3Timeline signal
4What’s next
  • More MVNOs entering with sub-€15 plans could pressure big networks to drop prices (Bonkers.ie)
  • ComReg may tighten fair usage transparency rules (ComReg (regulator))

Key facts about the plans: Eir’s SIM only at €14.99/month is the cheapest, while Vodafone Ultra at €20/month is the most expensive; Eir leads in 5G coverage per its own claim; Three advertises no hard cap but uses deprioritization.

Key facts about unlimited mobile plans in Ireland
Cheapest plan Eir SIM only at €14.99/month
Most expensive Vodafone Ultra at €20/month
5G coverage leader Eir (No.1 5G network availability per carrier)
No cap advertised Three (but deprioritization applies)

What is the best unlimited mobile plan in Ireland?

Which network offers the most value for heavy data users?

Heavy streamers and downloaders need more than just a low price. SmartSaver.ie (price tracking site) lists 48 Mobile’s unlimited plan at €12.99/month with 5G and 20GB EU roaming, while Switcher.ie (comparison platform) shows Sky Mobile’s Unlimited at the same price with a 3-year price freeze. However, value isn’t just about the upfront cost – it’s about what happens when you hit invisible limits.

How do the top three plans compare on price and features?

Eir’s SIM only plan charges €14.99/month with an 80GB fair usage cap, according to SmartSaver.ie. Vodafone Ultra at €20/month offers a higher 100GB cap and 5G. Three’s SIM Core plan costs €20/month and advertises unlimited data but reportedly deprioritizes speeds after 80GB of usage, as noted by Switcher.ie. The catch: no Irish network offers a truly unthrottled unlimited plan.

The trade-off

Heavy users on Three may see slower speeds during peak hours after 80GB, making Eir or Vodafone a more reliable pick for consistent performance – even with a hard cap.

The implication: for heavy data users, the €5 gap between Eir and Three is less important than the reliability of speed after data consumption.

Which network offers the cheapest unlimited data?

What is the price of Eir’s unlimited SIM only plan?

Eir’s SIM only unlimited plan costs €14.99/month for new customers, with unlimited calls and texts, 80GB fair usage, and 5G access, per SmartSaver.ie (price database). GoMo, which runs on Eir’s network, undercuts that with an introductory offer of €14.99 for the first 6 months, after which it rises to €19.99, according to Bonkers.ie (comparison site).

Are there any hidden fees or discounts?

SmartSaver.ie also lists Lycamobile’s National Unlimited at €12.99/month with no contract and 20GB EU roaming. Bonkers.ie notes that some MVNO deals, like 48 Mobile’s €12.99 plan, require a 30-day rolling contract with no exit fees. No hidden activation costs were reported across these plans, but fair usage caps are standard across all but Three’s offering.

What to watch

The cheapest plans often come with the lowest EU roaming allowances – 20GB vs 35GB on Three’s €20 plan. Frequent travellers may lose the bargain when abroad.

The pattern: budget plans trade roaming capacity for low price, so travellers need to calculate total cost including top-ups abroad.

How do unlimited plans compare across providers?

What are the key differences in data caps and throttling?

While most networks enforce a fair usage policy (typically 80-100GB per month), Three’s unlimited plan is marketed as truly unlimited but includes network management that may slow speeds after 80GB, according to Switcher.ie (comparison site). Vodafone and Eir have explicit caps of 100GB and 80GB respectively, after which data may be restricted or charged.

Which network has the best 5G coverage?

Eir claims the leading 5G network availability in Ireland, as stated on its website. Switcher.ie allows side-by-side comparisons of coverage maps, but independent testing data is sparse. All major networks now offer 5G on unlimited plans, but actual performance varies by location.

Three plans, even with deprioritization, may still be suitable in well-covered urban areas. For rural users, Eir’s network often provides wider 5G reach.

The implication

Network choice matters more than price for rural subscribers. Eir’s 5G lead could offset its slightly lower fair usage cap for those who rarely hit 80GB.

What this means: if you live outside a city, Eir’s coverage advantage may save you from frequent throttling despite its cap.

Are there truly unlimited data plans with no fair usage policy?

What does fair usage mean in practice?

Fair usage policies (FUPs) are limits set by networks to prevent abuse. Switcher.ie (comparison site) warns that some unlimited plans include a 100GB cap on data and limits on SMS/call durations. When the cap is reached, speeds may be reduced or additional charges apply. Tesco Mobile (retailer on Three’s network) explicitly states its €35 bill pay plan includes unlimited data but with a fair usage policy.

Which Irish networks offer the most generous terms?

Three markets its unlimited plan as having no explicit data cap, but Switcher.ie notes that deprioritization after 80GB is a form of throttling. Bonkers.ie (comparison site) reports that no Irish network offers completely unthrottled unlimited data. The Commission for Communications Regulation (ComReg) enforces transparency on these policies, but the regulator’s most recent guidelines stop short of banning network management.

The pattern: unlimited plans in Ireland are “unlimited” with a caveat. For most users, 80-100GB is ample, but knowing the threshold helps avoid surprises.

What should I consider when choosing an unlimited plan in Ireland?

Is a bill pay or prepaid plan better for unlimited data?

Bill pay plans often bundle better value for heavy users. For example, Vodafone’s Red Unlimited SIM Only at €15/month on a 12-month contract offers 5G and unlimited data with a 100GB cap, per SmartSaver.ie (price tracker). Prepaid plans, like Tesco Mobile’s €15 top-up plan (28-day cycle), provide flexibility but may have stricter fair usage limits. Best In Ireland (consumer guide) notes that prepaid SIMs are available in supermarkets and newsagents.

How do customer service and network reliability factor in?

Consumer satisfaction data from ComReg surveys show that customer service varies widely. While Bonkers.ie (comparison site) aggregates plan details, it does not include user reviews. For those prioritising support, Tesco Mobile (retailer) promises no mid-contract price increases, which adds peace of mind.

For family plans, Tesco Mobile offers a €35 monthly bill pay plan with Clubcard pricing, including 10,000 any-network minutes and 300 international minutes.

The upshot

Value for heavy data users comes down to balancing price, fair usage limits, and network coverage. No single plan wins all categories – the best choice depends on your usage pattern and location.

The catch: even the best plan requires accepting some trade-off, whether in roaming, speed after cap, or contract length.

Comparison table: Top unlimited plans side by side

Six plans, one pattern: the cheapest options come with tighter fair usage or shorter introductory periods, while mid-tier plans balance cost and generosity.

Plan Price Data (unlimited) Fair usage cap Contract 5G
48 Mobile unlimited €12.99/month Unlimited Reported 80GB (network management) 30-day rolling Yes
Sky Mobile Unlimited €12.99/month Unlimited Not publicly specified 36-month price freeze Yes
Eir SIM only €14.99/month Unlimited 80GB 12-month Yes
Tesco Mobile (prepay) €15 every 28 days Unlimited 50GB (based on plan) Prepay, no contract Yes
Vodafone Red Unlimited SIM Only €15/month Unlimited 100GB 12-month Yes
Three SIM Core €20/month Unlimited Deprioritisation after 80GB 12-month Yes

The pattern: the cheapest plans (€12.99) either cap roaming or leave fair usage vague, while €15-€20 plans offer transparent limits and higher EU allowances.

Spec table: Full feature breakdown

Eight key specs, one takeaway: EU roaming allowances vary dramatically, from 20GB to 35GB, which can make or break a plan for frequent travellers.

Feature 48 Mobile Sky Mobile Eir Vodafone Three Tesco Mobile
Price (monthly) €12.99 €12.99 €14.99 €15-€20 €20 €15 (prepay) / €35 (bill pay)
Data allowance Unlimited Unlimited Unlimited Unlimited Unlimited Unlimited
Fair usage cap 80GB (reported) Not disclosed 80GB 100GB Deprioritisation after 80GB 50GB (prepay) / varies
Contract length 30-day rolling 36-month price freeze 12-month 12-month 12-month Prepay no contract / 24-month bill pay
5G support Yes Yes Yes Yes Yes Yes
EU roaming 20GB Included (amount not specified) Not specified Included 35GB (SIM Core) 23GB (prepay) / varies
International calls Not included Not included Not included Not included Not included 300 mins on €35 plan
Network used Three Three Eir Vodafone Three Three

The takeaway: no provider stands out across all features – choose based on which trade‑offs (roaming, cap transparency, contract length) matter least to you.

Upsides

  • Ultra-low entry prices (€12.99) from MVNOs like 48 Mobile and Sky Mobile.
  • Three’s no-hard-cap approach appeals to extreme users willing to risk deprioritisation.
  • Bill pay plans from Vodafone and Eir offer transparent fair usage and 5G.

Downsides

  • No truly unthrottled unlimited plan exists – all have network management or caps.
  • EU roaming allowances vary greatly (20GB vs 35GB), penalising travellers.
  • Cheapest plans often have shorter introductory prices that jump after 6 months.

The balance: the upsides favour budget‑conscious urban users; the downsides hit heavy streamers and frequent travellers hardest.

Confirmed facts vs. what remains unclear

The research confirms several certainties, but key details about throttling and customer satisfaction remain fuzzy.

Confirmed facts

  • Three offers unlimited data with no explicit fair usage cap, but deprioritisation applies after 80GB (Switcher.ie).
  • Eir’s cheapest unlimited plan is €14.99/month for new customers (SmartSaver.ie).
  • Vodafone Ultra costs €20/month with unlimited everything and a 100GB cap (SmartSaver.ie).

What’s unclear

  • Exact throttling thresholds for Three after heavy usage are not publicly documented (Switcher.ie).
  • Whether GoMo will extend its €14.99 introductory price beyond six months (SmartSaver.ie).
  • Customer service ratings per network are not consistently published (Bonkers.ie).

“Our bill pay plans will not increase mid-contract.”

– Tesco Mobile Ireland (retailer website)

“Clear Mobile offered unlimited data and calls plus 10,000 texts for €12.99 per month on a 30-day rolling plan.”

– Irish Tech News (tech news outlet, October 2025)

“The best SIM-only plan in Ireland depends on individual needs.”

– Bonkers.ie (comparison site)

If you’re switching to a new unlimited plan, a practical first step is to transfer your contacts. Our guide on how to transfer contacts to a new phone covers Android and iPhone methods. For tech comparisons in the Irish market, you might also find our Samsung 55-inch smart TV buying guide useful.

Additional sources

switcher.ie, youtube.com

For a closer look at the most affordable options, check out our comparison of cheapest unlimited mobile deals in Ireland.

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Frequently asked questions

Can I use unlimited data abroad with Irish plans?

Most Irish unlimited plans include EU roaming allowances, typically between 20GB and 35GB per month. Outside the EU, data is usually charged at pay-as-you-go rates or requires a roaming add-on. Check your plan’s fair usage policy before travelling.

What is a fair usage policy and how does it affect me?

A fair usage policy (FUP) sets a limit on how much data you can use before the network slows your speed or applies restrictions. Once you exceed the cap – typically 80-100GB on most Irish plans – your connection may be throttled or additional charges may apply.

Which network has the best coverage in rural Ireland?

Eir claims the largest 5G network availability in Ireland, which often translates to better coverage in rural areas. Vodafone and Three also have extensive 4G and 5G coverage, but checking specific location coverage maps on Switcher.ie is recommended.

Are there unlimited plans for multiple lines (family)?

Yes, Tesco Mobile offers a €35 monthly bill pay plan with unlimited data and 10,000 any-network minutes, suitable for family use. Vodafone and Eir also offer multi-line discounts, though they are not always prominently advertised.

How do I switch providers and keep my number?

You can keep your number by requesting a mobile switching code (UPC) from your current provider. The new provider will handle the transfer, which usually takes one working day. Most Irish networks offer a 30-day cooling-off period for SIM-only plans.

Do any unlimited plans include international calls?

Tesco Mobile’s €35 bill pay plan includes 300 international minutes. Other providers, such as 48 Mobile and Sky Mobile, do not include international calls in their base unlimited plans. Check plan details for international call allowances.

What happens if I exceed the fair usage cap?

Exceeding the cap typically results in reduced data speeds or additional charges. For example, Three deprioritises speeds after 80GB, while Vodafone and Eir may restrict data access entirely until the next billing cycle. Always review the specific fair usage terms.

Is there a contract commitment with unlimited plans?

Many unlimited plans require a 12-month commitment, but 30-day rolling contracts are available from providers like 48 Mobile and Lycamobile. Prepaid plans offer no contract but may have higher per-month costs compared to bill pay.

For Irish consumers, the choice of unlimited mobile plan is no longer about whether to get unlimited data, but which set of compromises fits best. If you stay mostly within coverage of a strong network and use under 80GB per month, Eir’s €14.99 plan or Three’s €20 plan (for its no-hard-cap model) offer the best value. For families or international callers, Tesco Mobile’s €35 bill pay plan is a solid bet. The catch: no single plan delivers unlimited everything without some form of network management. For the budget-conscious heavy user, 48 Mobile at €12.99 is the cheapest entry point, but its EU roaming allowance is limited. The trade-off is clear: pick the plan whose limitations you can live with.