O2 Slovakia review
Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026
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Our verdict
O2 Slovakia is a network-run Slovak provider that suits anyone wanting a low-cost rolling sim only line with a cheap unlimited option. Its unlimited daily data plan costs €1.44, ranking 5 of 173 brands on that price, and coverage reaches 99.77% of the population.
Key facts
- Best for
- A Slovak rolling sim only line with unlimited daily data at a low monthly figure.
- Seller type
- Network (Source, checked September 30, 2026)
- SIM-only
- Yes (Source, checked September 30, 2026)
- Price from
- €15.37 (Source, checked September 30, 2026)
- Reference plan prices
- O2 Maxx: 20 EUR per month, 100 GB, 1 month rolling (no 12 month contract is sold); O2 Fer na fakturu with Nekoncne denne data: 1.44 EUR per month, unlimited daily data, 1 month rolling; O2 Datovka: 15.37 EUR per month, 30 GB, 1 month rolling (Source, checked September 30, 2026)
- Unlimited plan price
- €1.44 (Source, checked September 30, 2026)
- 5G
- Yes (Source, checked September 30, 2026)
- eSIM
- Yes (Source, checked September 30, 2026)
- EU roaming
- Fair use (Source, checked September 30, 2026)
- Data rollover
- Yes (Source, checked September 30, 2026)
- Multi-line discount
- Yes (Source, checked September 30, 2026)
- Network coverage
- 99.77% (Source, checked September 30, 2026)
- Legal entity
- O2 Slovakia, s.r.o. (Source, checked September 30, 2026)
- Headquarters
- Slovakia (Source, checked September 30, 2026)
- Support channels
- Email, Chat, Phone, Help-centre (Source, checked September 30, 2026)
- Billing
- Rolling, Prepaid
- Contract length
- 1
- Official website
- o2.sk
Apps and profiles
Pros and cons
Pros
- Unlimited daily data on O2 Fer na fakturu costs €1.44, and that plan ranks 5 of 173 brands on unlimited price, which is where this provider pulls ahead.
- Unused data rolls into the next cycle and a multi line discount is offered, so spare allowance is not wasted and extra lines on the same account cost less than taking them apart.
- Coverage reaches 99.77% of the population with eSIM included, so a number can be moved to a digital SIM without leaving the network.
- Support runs through email, chat and phone, giving a phone line, live chat, email and a help centre rather than online forms alone.
Cons
- O2 Datovka at €15.37 sits above the €9.30 site median for a starting price, so the cheapest line here is not a budget option.
- The only term sold is 1 month and every reference plan rolls, so there is no annual rate to lock in and no introductory price that later steps up.
- Roaming follows fair use terms rather than sitting inside the monthly price, so travel use can be limited in a way the home figure does not show.
- Sim only is the only format listed, so anyone who wants a handset financed with the line finds nothing here.
Who it suits
- Slovak households wanting a single rolling line with a mid sized data allowance and no long minimum term.
- Heavy data users who would rather pay €1.44 for unlimited daily data than shop around for a larger capped allowance.
- Readers running several numbers on one account, since a multi line discount and data rollover are both standard.
Who should look elsewhere
- Readers who want a contract rather than a rolling line: GETESA bills on prepaid and contract terms, and Lonestar Cell MTN on contract and prepaid terms.
- Anyone who needs a handset alongside the line, since sim only is the only format listed for O2 Slovakia; yesss! is the other line to weigh, billing on contract, rolling and prepaid terms.
- Travellers who expect roaming inside the monthly price, since roaming here follows fair use terms; yesss! is the alternative to check for a trip heavy month.
Where it sits among rivals
The price columns say opposite things, so read them separately. On starting price O2 Slovakia sits at 222 of 258 brands, which is in the middle of the table rather than at the budget end. On unlimited data the same brand moves to 5 of 173, close to the front of that column. The gap between the two is the story. The range opens at an ordinary price and then drops sharply at the unlimited end, which means anyone shopping only on the advertised starting figure will misjudge what the provider is worth. Anyone who streams, shares photos or backs up over mobile data most days should weigh the unlimited column instead.
Pricing
The entry point is O2 Datovka at €15.37 for the month, a plan with a mid sized allowance on a rolling term. Above it, O2 Maxx carries a much larger allowance for a higher monthly figure, while O2 Fer na fakturu with Nekoncne denne data removes the daily data cap at €1.44. Each plan bills on rolling and prepaid terms and the only term sold is 1 month, so the monthly figure listed is the figure carried from month to month. There is no introductory rate that later steps up, and no longer contract that trades a discount for a longer tie. That keeps a line easy to budget, and it also means a committed customer has nothing extra to gain by staying.
What it does well
Taken in turn, the feature list is what a home network should carry. Sim only is available as a standalone line, the newest generation of mobile data runs across the network, and eSIM is offered, so a number can be issued as a digital SIM instead of a plastic card. Data rollover is included, so unused allowance moves into the next cycle rather than disappearing, and a multi line discount is offered, so extra lines on the same account are cheaper than buying them separately. Coverage reaches 99.77% of the population, a figure that comes from owning the radio access network rather than reselling another operator. What is not on the list is handset or device financing, since sim only is the only format published.
Who runs it
O2 Slovakia is a network operator rather than a reseller or a virtual provider, which is why the coverage and network details come straight from the operator. The company behind the plans is O2 Slovakia, s.r.o., registered in Slovakia, so this is a domestic Slovak business rather than a foreign reseller selling someone else's signal. Support runs through email, chat and phone, giving a phone line, live chat, email and a self service help centre. That mix suits readers who would rather deal with the network itself, and readers who want help in Slovak rather than routed through an international desk.
How O2 Slovakia compares
- 9.2 vs 8.5
9.2 vs 8.5
9.2 vs 8.5- 9.2 vs 8.7
- 9.2 vs 8.6
9.2 vs 8.5
9.2 vs 8.8
9.2 vs 9.0
9.2 vs 8.5
9.2 vs 9.0
9.2 vs 9.1
9.2 vs 8.8- 9.2 vs 9.4
9.2 vs 9.4
9.2 vs 9.3
9.2 vs 9.2
9.2 vs 9.2
9.2 vs 9.2Budget Thuis Mobile
9.2 vs 9.1
9.2 vs 9.1
9.2 vs 9.1
9.2 vs 9.1
9.2 vs 9.1
9.2 vs 9.1
9.2 vs 9.0
9.2 vs 9.0
9.2 vs 9.0
9.2 vs 8.8- 9.2 vs 8.8
9.2 vs 8.7
9.2 vs 8.7
9.2 vs 8.7
9.2 vs 8.6- 9.2 vs 8.6
9.2 vs 8.6
9.2 vs 8.6
9.2 vs 8.5
9.2 vs 8.5
9.2 vs 8.5- 9.2 vs 8.5
- 9.2 vs 8.5
- 9.2 vs 8.5
9.2 vs 8.0- 9.2 vs 8.0
- 9.2 vs 8.0
9.2 vs 8.0
Frequently asked questions
How much is the cheapest O2 Slovakia plan?+
The cheapest plan is O2 Datovka at €15.37 for the month, with a mid sized data allowance included. It bills on 1 month rolling terms, so nothing needs renewing in advance. That starting figure sits in the middle of the table on this comparison, so the line is not a budget pick.
Which plan has unlimited data and what does it cost?+
O2 Fer na fakturu with Nekoncne denne data is the unlimited option, priced at €1.44 per month. That is less than the capped plan above it, and the option ranks 5 of 173 brands on unlimited price. Anyone who uses most of their allowance each cycle should start here rather than at the entry plan.
Do I have to sign a long contract?+
The only term sold is 1 month, and billing is rolling and prepaid, so a line can be changed or cancelled without a long notice period. The other side of that is that no longer contract is sold, so a customer who would happily commit cannot get a lower rate for it. Predictability is the trade here.
Can I use the line abroad?+
Roaming follows fair use terms rather than being bundled into the monthly price, so use in other countries is limited. The plan is a home network plan registered in Slovakia, built for use inside the country. Anyone who spends much of the year travelling should read the roaming terms before choosing a plan.
Does the network offer the newest mobile data and an eSIM?+
The newest generation of mobile data runs across the network, and eSIM is offered, so a new number can be issued as a digital SIM rather than a plastic card. Both sit on the same network that reaches 99.77% of the population, which matters when a handset is replaced or another number is added.
Can I run more than one number on the account?+
A multi line discount is offered, so extra lines on the same account are cheaper than taking them apart. Data rollover is included as well, so unused allowance carries into the next cycle instead of disappearing. Each line keeps rolling and prepaid billing, which makes the cost per line simple to work out.
How do I reach support if something goes wrong?+
Support runs through email, chat and phone, so there is a phone line, live chat, email and a self service help centre rather than online forms alone. The plans are sold by O2 Slovakia, s.r.o., registered in Slovakia, so help comes from the Slovak network operator itself. There is no community forum in the listed channels, so questions are answered by staff.
Does the line come with a phone?+
Sim only is the only format listed, so the line is sold on its own and O2 Datovka at €15.37 is the whole starting cost. Device financing is not among the published options, so a buyer who wants a handset alongside the line should look at a provider that bundles one.
Sources
- o2.sk checked September 30, 2026
Backs: Headquarters, Legal entity
“2026 O2 Slovakia, s.r.o. All rights reserved”
- o2.sk/o2-pausal checked September 30, 2026
Backs: Billing, EU roaming, Multi-line discount, Contract length, SIM-only
“All O2 Pausals are without commitment. You can change or cancel them at any time without fees”
- o2.sk/podpora/roaming checked September 30, 2026
Backs: Support channels
“If you need immediate help you can call O2 customer support +421 949 949 989; Milo chatbot is available 24/7; Support centre; send the invoice to udaje@o2.sk”
- o2.sk/ponuka/mobilne-sluzby checked September 30, 2026
Backs: Network coverage, Data rollover, ESIM, 5G, Reference plan prices, Unlimited plan price
“5G network with coverage of more than 99.77 % of Slovakia's population”
- o2.sk/ponuka/mobilne-sluzby/o2-datovka checked September 30, 2026
Backs: Price from
“O2 Datovka: with any O2 Pausal for only 15.37 EUR per month, standalone 30.74 EUR per month”
- spolocnost.o2.sk checked September 30, 2026
Backs: Seller type
“We bring top quality 5G network to all districts”
Compiled from 6 source pages, checked September 30, 2026. We did not open an account.
O2 Slovakia
A Slovak rolling sim only line with unlimited daily data at a low monthly figure.