O2 Slovakia review

Updated September 28, 2026 · NomadCue Editorial Team · Facts checked September 26, 2026

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Our verdict

O2 Slovakia suits anyone who already carries a Slovak carrier plan and wants Europe and UK roaming inside the same subscription. Coverage reaches 77 countries, but unlimited data is not on offer, so heavy streaming abroad still runs into a per-plan EU limit.

Key facts

Best for
Europe and UK roaming for existing Slovak subscribers
Price from
€5.13↗
Countries covered
77↗
Unlimited data
No↗
Reference plan prices
Zone 2 (US, Japan, Thailand, Turkey, Mexico): 1 GB 7 EUR / 7 days, 3 GB 10 EUR, 5 GB 15 EUR, 10 GB 25 EUR / 30 days; Europe and UK (Zone 1): roaming included in the plan with a per-plan EU data limit, EU Full 5.13 EUR per month↗
5G
Yes↗
Fair use policy
EU data limit per plan (e.g. 28.9 GB on O2 Maxx, 31.8 GB on Basic O2 Pausal); above the limit 0.001353 EUR/MB; the free Roaming Datalimit service means you never exceed 50 EUR of data spend; Unlimited daily data still counts towards the EU data limit↗
Networks
O2, Slovak Telekom, Orange Slovensko↗
Top-ups
Yes↗
Seller type
Carrier↗
10 GB in Europe
€25↗
10 GB in the US
€25↗
10 GB in Japan
€25↗
Legal entity
O2 Slovakia, s.r.o.↗
Headquarters
Slovakia↗
Founded
2002↗
Support channels
Email, Chat, Phone, Help-centre↗
Features
5G, Carrier plan
Audience
Short trips, Long trips
Official website
o2.sk

Facts checked September 26, 2026, 5 sources

Pros and cons

Pros

  • Roaming in Europe and the UK sits inside the plan, so a Slovak subscriber needs no second eSIM for a European trip
  • Roaming packs reach the US, Japan, Thailand, Turkey and Mexico, with smaller bundles below the top price
  • Support runs on email, chat and phone, so the help centre and phone lines cover roaming problems
  • The Roaming Datalimit service caps roaming data spend, and top-ups are available during the trip

Cons

  • Unlimited data is not offered: the fair use policy caps Europe and UK roaming at a per-plan EU limit, and unlimited daily data still counts towards it
  • Once the EU limit is used up, extra data is billed per megabyte, which adds up on a long trip
  • Coverage of 77 countries is narrow for a global plan, well short of Zwitchy at 200
O2 Slovakia

Ready to try O2 Slovakia?

Scored 8.8 / 10 by NomadCue.

Who it suits

  • Slovak subscribers who want Europe and UK roaming folded into the plan they already have
  • Travellers to the US, Japan, Thailand, Turkey or Mexico who can size a roaming pack in advance
  • People who prefer carrier support over an app only marketplace, with email, chat and phone on offer

Who should look elsewhere

  • Anyone who needs unlimited data: it is not on offer here, while Zwitchy covers 200 countries on a global plan
  • Travellers after a destination-specific eSIM: SimToIsrael starts at $25 and needs no Slovak subscription

How O2 Slovakia compares

Where O2 Slovakia is available

Available
Slovakia

Countries from the brand (Source, checked September 26, 2026)

Frequently asked questions

How much does roaming cost in Europe and the UK?+

Roaming inside Europe and the UK is included in the plan, with a per-plan EU data limit set by the fair use policy rather than a shared allowance. EU Full raises that cap at €5.13 a month. Past the limit data is billed per megabyte, and the Roaming Datalimit service stops roaming spend running away.

What does data cost outside Europe?+

Travellers heading to the US, Japan, Thailand, Turkey or Mexico buy roaming packs, and the largest listed pack is €25, matching €25 in Japan. Smaller bundles cost less, and the fair use policy keeps charges at a set per megabyte rate once the EU allowance is used up.

How many countries does O2 Slovakia cover?+

Roaming reaches 77 countries, near the 74 median across the plans tracked here and far short of the widest global eSIMs. Anyone crossing continents for a single trip gets more from a broader catalogue.

Does O2 Slovakia offer unlimited data?+

Unlimited data is not offered. The fair use policy puts a per-plan EU data limit on roaming in Europe and the UK, and unlimited daily data still counts towards that limit. Against the 42.8% share of plans here that do offer unlimited data, heavy streaming abroad needs budgeting.

Who is this plan for?+

short trip and long trip covers both short trips and longer stays, and as a carrier rather than a marketplace the plan suits a Slovak subscriber first: Europe and the UK come inside the subscription, while travel further afield is priced by pack. Top-ups are available, so extra data can be added mid-trip.

How do I get help if something goes wrong?+

Support runs on email, chat and phone, so the help centre, phone, chat and email all handle roaming queries. The operator is registered in Slovakia, and the same channels cover top-ups and plan changes, which matters most when you are abroad and cannot visit a store.

Is O2 Slovakia an eSIM or a carrier plan?+

It is a carrier selling its own subscription rather than a travel eSIM marketplace listing, with service on O2, Slovak Telekom and Orange Slovensko. That means roaming arrives with the plan and its EU data limit, and top-ups are handled by the carrier directly, with the same support channels as a domestic line.

Sources

  • sk.wikipedia.org/wiki/O2_Slovakia checked September 26, 2026

    Backs: Founded, Networks, Seller type

    “Founded 12 December 2002 (operations launched 2 February 2007)”

  • spolocnost.o2.sk/spolocnost checked September 26, 2026

    Backs: Features, 5G

    “we are expanding our 5G network across all of Slovakia”

  • o2.sk checked September 26, 2026

    Backs: Top-ups

    “Credit top-up (Dobitie kreditu)”

  • o2.sk/roaming checked September 26, 2026

    Backs: Audience, Countries covered, Fair use policy, 10 GB in Europe, Price from, 10 GB in Japan, 10 GB in the US, Reference plan prices, Unlimited data

    “1 GB of roaming data for 7 EUR for a period of one week ... 3 GB in roaming for 10 EUR, 5 GB for 15 EUR, 10 GB for 25 EUR for a period of 30 days”

  • spolocnost.o2.sk/spolocnost/kontakty checked September 26, 2026

    Backs: Headquarters, Legal entity, Support channels

    “Registered office of the company: O2 Slovakia, s.r.o., Pribinova 40, 811 09 Bratislava”

Compiled from 5 source pages, checked September 26, 2026. We did not open an account.

Not confirmed yet: Price per GB from, Hotspot sharing.

O2 Slovakia

O2 Slovakia

Europe and UK roaming for existing Slovak subscribers

8.8/10See alternatives