People search this matchup because both say unlimited 5G. The split is indoor signal, then price. If Three works at home, compare GoMo vs 48 instead. 48 is €12.99 on Three radio with a plastic SIM and a student 100 GB plan.
Take Three retail when you want Three+ and will not use an MVNO. Take GoMo when Eir is the radio that works and you can live in an app.
Quick comparison
Side by side from published August 2026 prices and contract terms. Green highlights the better figure on each measurable row.
| GoMo | Three | |
|---|---|---|
| Our score | 9.1 | 8.2 |
| Intro from | €12.99 | €14 |
| Thereafter from | €12.99 | €20 |
| Headline data | Unlimited | Unlimited |
| Host network | Eir network | Three network |
| Annual rise | No | Yes |
| eSIM | Yes | Yes |
| Kind | MVNO | MNO |
Price: €12.99 versus €20, or a Freedom cliff
GoMo is €12.99 with no listed jump, plus a €12.99 once-off activation fee: €168.87 in year one. Three SIM Core is €20, €240 a year, and Three bill-pay contracts from July 2025 add a fixed €2.50 a month every April on SIM-only (€3 on phone plans), inside the term. Freedom looks like €14, then €28. Prepay is exempt from the April rise.
If you wanted Three radio at GoMo money, that product is 48, not Three retail.
Network: Eir radio versus Three radio
Different masts. GoMo cannot fix a dead Three kitchen. Three cannot fix a dead Eir kitchen.
Test both. Rural: best mobile for rural Ireland.
Data: both unlimited 5G on the lead plans
GoMo is one unlimited 5G plan. Three’s listed SIMs are All You Can Eat 5G. Fair-use still applies.
Three also has a 10 GB Total Talker prepay. GoMo does not do a light tier. 48 does, on Three radio, at €10.99 student 100 GB 4G.
Contract: GoMo rolling versus Three 12 or 24 months
GoMo is rolling monthly with no annual rise. Three SIM Core is 12 months. Freedom is 24 months after the teaser. Flex is rolling at €34.99. Three’s April increase applies inside the bill-pay term.
Leaving Three mid-term can cost. Leaving GoMo is the current month.
Roaming: Three lists bigger caps on dear plans
GoMo lists 23 GB EU. Three Freedom and Flex list 60 GB. Core lists 35 GB.
You are paying Three prices for those caps.
Who it's for: pick the radio, then do not overpay
GoMo if Eir works. 48 if Three works and you want cheap. Three retail if you want the mothership on Three masts. Mixing GoMo and Three as if they were the same signal is the mistake this page exists to stop.
Which should you choose?
It comes down to cost profile, host network fit, and contract style. Use this fast decision frame.
Choose GoMo if
Eir coverage is stronger where you live and commute. You want €12.99, eSIM, no cliff, and you do not need a shop queue.
Check GoMo →
Choose Three if
Three coverage is the one that works, and you specifically want the Three account and perks rather than 48 on the same masts. You will pay more for that.
Check Three →Advertiser disclosure: we may earn a commission when you buy through links on this page. That never affects scores or the winner.
