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SIM Cards in Slovakia: The Best Prepaid Plans | 2024 Guide

Slovakia – known for its castles, folk dancing & landscapes.

Apparently, the country has the highest concentration of castles worldwide.

So, castle lovers – you know where to go to.

But besides castles, what else can you do in Slovakia? A lot.

Many churches, like The Blue Church, are worth visiting.

If you love nature and hiking, head to the mountains, and you will love the landscapes.

And if you are into skiing, skip Austria and ski in Slovakia – it will be much cheaper.

As you can see, the country has a lot to offer.

What it cannot offer you, unless you have an EU/EEA SIM card, is low international roaming rates.

International roaming can be expensive, which is why I always recommend local SIM cards, like a Slovak one, so that you can enjoy local rates.

And oh boy – SIM cards are inexpensive in Slovakia.

You can get a Slovak SIM card for 1 EUR (1.05 USD) or 2 EUR (2.15 USD) from Orange, 2 EUR from O2, 4 EUR (4.25 USD) from 4ka (by Swan Mobile) & 5 EUR (5.30 USD) from Slovak Telekom (formerly T-Mobile) in their stores or post offices. SIM cards are sold near Bratislava-M.R. Štefánik Airport (BTS) at the AVION Shopping Park Bratislava mall.

Those prices are not too bad, right?

What may be bad are the high mobile data rates in the country (for Central- and Eastern European standards).

But the data-featured plans will not break the bank (unlike some countries in the Caribbean).

In this guide, I will go over everything you need to know about buying a SIM card in Slovakia. Let's get started, shall we?

Buying a SIM Card in Slovakia Guide (logos of Slovak Telekom, Orange, 4ka & O2)

Original publication: 5th of February 2022. Last updated: 1st of March 2024.


Table of Contents

What is the Best SIM Card in Slovakia?

If you want to buy the best SIM card in Slovakia, I recommend going with Slovak Telekom (formerly T-Mobile) or 4ka (by Swan Mobile). Slovak Telekom has the fastest speeds and best coverage. 4ka is the cheapest and the most generous, but it has the worst coverage and the slowest speeds.

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So, who are all these mobile operators and what options are available for you?

Slovakia has four mobile operators offering prepaid services easily accessible to tourists:

  • Slovak Telekom (formerly T-Mobile)
  • Orange Slovakia
  • O2 Slovakia
  • 4ka (by Swan Mobile)
Cellular Connectivity Illustration by Phone Travel Wiz

Anyone living in or visiting Slovakia can buy a Slovak SIM card with no restrictions, but you do have to comply with the Slovak SIM card registration regulations.

  • Find out which countries have SIM card registration regulations and what is required from you (lookup tool)
SIM Card Registration Worldwide Tool by Phone Travel Wiz

Which, in this case, is only showing your passport (or European Union ID if you have one) at the point of sale.

Where Can You Buy a Slovak SIM Card (+Costs)?

You can get a Slovak SIM card in Slovak Telekom (formerly T-Mobile), Orange, O2 & 4ka (by Swan Mobile) stores. Some Slovak airports sell (tourist) SIM cards (at inflated prices).

You can expect to pay the following for Slovak SIM cards:

  • Slovak Telekom (formerly T-Mobile): 5 EUR
  • Orange Slovakia: 1 EUR & 2 EUR
  • O2 Slovakia: 2 EUR
  • 4ka (by Swan Mobile): 4 EUR

Note that SIM cards can be more expensive than those listed above when purchased at an airport.

Use the Wise Currency Converter tool (free) for up-to-date EUR (Euro) to your currency (let's say GBP – (British) Pound (Sterling)) exchange rates.

Wise Currency Exchange Banner
© Wise

For your convenience, below are some exchange rates between EUR and USD (US Dollars):

  • 1 EUR = 1.05 USD
  • 10 EUR = 10.70 USD
  • 100 EUR = 107 USD

But for any other currency, the Wise Currency Converter tool.

(Travel) eSIMs for Slovakia

In recent years, (travel) eSIMs have become extremely popular.

Especially after Apple made iPhones (14- & 15 series) sold in the United States eSIM-only, forcing its users to use eSIMs – even when abroad.

As a result, the adoption of eSIM technology by mobile operators worldwide rose impressively quickly.

Currently, Slovak Telekom, Orange Slovakia, O2 Slovakia & 4ka (by Swan Mobile) offer eSIMs to prepaid customers.

But if you purchase an eSIM from any of these mobile operators, you must comply with Slovakia SIM card registration regulations.

Suppose you do not wish to do so for privacy reasons (for example) or want to be connected immediately without paying for an overpriced SIM card (or eSIM) sold at a Slovak airport. In that case, you may consider getting a travel eSIM for Slovakia.

In my Slovakia eSIM buying guide, I analyze various eSIM options of eSIM providers I have tested extensively worldwide.

Buying an eSIM for Slovakia Guide (logos of 4KA, O2, Holafly, T-Mobile, SimOptions, Nomad, Eurolink, Airalo, Orange, Dobrý deň! & Alosim)

Surprisingly, travel eSIMs can be cheaper than a Slovak SIM card or eSIM in specific scenarios.

Moreover, Europe-wide and global eSIM options are also available at competitive prices (without having to deal with expensive international roaming rates).

In this Slovakia SIM card buying guide (the one you are reading), I will stick to the local SIM cards and eSIM, but you can read my Slovakia eSIM buying guide for more information about travel eSIMs covering the country.

But here is a quick overview already + applicable discount codes if you are interested in purchasing a travel eSIM for Slovakia:

  • Airalo: Dobrý deň! (Slovakia only), Eurolink (39 countries in Europe) & Discover+ (130 countries worldwide + up to 200 worldwide minutes & 200 worldwide SMS)
  • Alosim: Slovakia & Europe (32 countries)
  • Holafly: Slovakia & Europe (32 countries) – all variants in both options include unlimited data + up to 120 Europe-wide calls
  • Nomad: Slovakia, Europe (30 or 35 countries, depending on the variant) & Global (109 or 139 countries, depending on the variant)

Here are some discount codes to sweeten the deal:

  • Airalo: NEWMAY15 for 15% off (if you have never bought an Airalo eSIM before). Otherwise, AIRALOMAY10 for 10% off (for existing users) – only the first 3000 users can redeem either discount code)
  • Alosim: PTW for 5% off (as many times as you wish for as many eSIMs as you want)
  • Holafly: PHONETRAVELWIZ for 5% off (as many times as you wish for as many eSIMs as you want)
  • Nomad: ADU123 for 3 USD off (on your first-ever Nomad order only)

Once again, check out my Slovakia eSIM buying guide to learn more about these eSIM options.

Buying an eSIM for Slovakia Guide (logos of 4KA, O2, Holafly, T-Mobile, SimOptions, Nomad, Eurolink, Airalo, Orange, Dobrý deň! & Alosim)

The eSIM guide is as comprehensive as this SIM card buying guide, but it solely focuses on travel eSIMs (while the guide you are reading focuses on local SIM cards and eSIMs for prepaid users (where applicable).

Slovakia Prepaid SIM Cards Explored

Below, I will guide you through Slovak Telekom (formerly T-Mobile), Orange Slovakia, O2 Slovakia & 4ka (by Swan Mobile) and go through:

  • Background information
  • Mobile coverage
  • SIM card types, prices & availability
  • Recharge/top-up information
  • Combo plans, data plans & special packs (such as social media packs)

With that said, let's see what Slovakia offers us.


Slovak Telekom (formerly T-Mobile)

Telekom Logo
© (Slovak) Telekom

Slovak Telekom, sometimes referred to as just Telekom and formerly T-Mobile Slovakia, is the largest mobile operator in Slovakia.

It is, together with Orange Slovakia, the mobile operator with the best overall network.

Slovak Telekom, by Deutsche Telekom (from Germany), is active in Europe (as Telekom and T-Mobile) and the United States (as T-Mobile).

Slovak Telekom uses the following frequencies:

  • 2G: 900 MHz & 1800 MHz
  • 3G: 900 MHz & 2100 MHz
  • 4G/LTE: 800 MHz (Band 20), 1800 MHz (Band 3) & 2600 MHz (Band 7)
  • 5G NR: 2100 MHz (n1)
  • VoLTE: Yes
  • VoWiFi: No

This is what you will learn about Slovak Telekom:

* Coverage
* How to Get a Slovak Telekom SIM Card & SIM Card Price
* Topping Up Options & Methods + Balance Check
* Plans & Packages
* APN/Internet Settings

Coverage – Slovak Telekom (formerly T-Mobile)

Slovak Telekom has the best 4G/LTE coverage experience.

This was also confirmed by Opensignal.

Below is Slovak Telekom's coverage map produced by Speedtest:

SIM Card Price – Slovak Telekom (formerly T-Mobile)

You can get a Slovak Telekom SIM card, called Predplatenka, for 5 EUR with 10 EUR credit, 1 GB of data & unlimited local minutes in Slovak Telekom stores. SIM cards are not sold at Bratislava-M.R. Štefánik Airport (BTS), but the AVION Shopping Park Bratislava mall near the airport does have a Slovak Telekom store.

Slovak Telekom SIM Card Price

You may have to text VoLTE to 12323 to activate VoLTE.

  • Find out how much SIM cards cost in every country, including data-only SIM cards and tourist SIM cards, offered by each mobile operator + information about starter benefits (lookup tool)
SIM Card Prices Worldwide Tool by Phone Travel Wiz

It is also possible to get a Slovak Telekom eSIM for the same price as a regular SIM card.

You can consider getting a travel eSIM for Slovakia, which can, in specific scenarios, be cheaper than getting a SIM card from Slovak Telekom.

Especially if you get a Europe-wide eSIM (for when you visit at least two or more supported European countries) or a global eSIM (for frequent travelers visiting multiple continents).

In my Slovakia eSIM buying guide, I analyze various eSIM options of eSIM providers I have tested extensively worldwide.

But I will introduce them here quickly:

  • Airalo: Dobrý deň! (Slovakia only), Eurolink (39 countries in Europe) & Discover+ (130 countries worldwide + up to 200 worldwide minutes & 200 worldwide SMS) – use code NEWMAY15 (15% off – first-time users only) or AIRALOMAY10 (10% off)
  • Alosim: Slovakia & Europe (32 countries) – use code PTW (5% off – no limits)
  • Holafly: Slovakia & Europe (32 countries) – all variants in both options include unlimited data + up to 120 Europe-wide calls – use code PHONETRAVELWIZ (5% off – no limits)
  • Nomad: Slovakia, Europe (30 or 35 countries, depending on the variant) & Global (109 or 139 countries, depending on the variant) – use code ADU123 (3 USD off – first-time users only)

Once again, check out my Slovakia eSIM buying guide to learn more about these eSIM options.

Buying an eSIM for Slovakia Guide (logos of 4KA, O2, Holafly, T-Mobile, SimOptions, Nomad, Eurolink, Airalo, Orange, Dobrý deň! & Alosim)

For now, I will continue with Slovak Telekom.

Note that Slovak Telekom offers VoLTE (Voice over LTE (4G)) if your phone supports it and you have enabled it in the settings but no VoWiFi (Voice over WiFi).

Support Me on Ko-Fi Orange

Top-Up, Recharge & Balance Check – Slovak Telekom (formerly T-Mobile)

Slovak Telekom top-ups are available in Slovak Telekom stores, grocery stores, corner shops & electronics shops throughout Slovakia.

The following (online) Slovak Telekom top-ups are available:

  • 7 EUR
  • 10 EUR
  • 12 EUR
  • 16 EUR
  • 25 EUR
  • 50 EUR

To top up your Slovak Telekom SIM card, the salesperson how much credit you want, your phone number, pay, and they will top up your SIM card with the POS system.

You can also recharge online with (international/EU) debit and credit cards.

Dial *111# to check your Slovak Telekom balance.

You can also top up and check your balance on the (Slovak) Telekom app (Android/iOS/Huawei AppGallery).

Slovak Telekom App
© Slovak Telekom

Packages, Plans, Bundles & Offers – Slovak Telekom (formerly T-Mobile)

Slovak Telekom has only one data-featured prepaid plan: Doplnkové Balíky k Predplatenke (Additional Payment Packages). It is a combo plan with data (with 5G NR access) and minutes.

I will list all the prices in EUR (Euro).

To convert XCD to your currency (let's say USD) with up-to-date exchange rates, use the Wise Currency Converter tool.

Wise Currency Exchange Banner
© Wise

Text the Activation Code to 12330 to activate Doplnkové Balíky k Predplatenke:

PriceDataEU/EEA DataLocal MinutesValidityActivation CodeDeactivation Code
0.50 EUR300 MBShared with data allowanceN/AUntil midnightDATAN/A
1.50 EUR2 GB1.39 GBN/A24 hours2GBDENN/A
2 EUR1 GBShared with data allowanceN/A10 days1GB10DNIN/A
2 EURUnlimited1.86 GBN/A24 hoursApp onlyApp only
2.50 EURN/AN/AUnlimited30 daysVOLANIA ZAP 09XXXXXXXXVOLANIA VYP 09XXXXXXXX
3 EUR1 GBShared with data allowance30 days1GB30DNI 30 DAYS OFF
4 EURUnlimited3.71 GBN/A10 daysCONNECTION10 DAYSN/A
6 EUR3 GBShared with data allowance30 days3GB30DNI30 DAYS OFF
8 EUR5 GBShared with data allowance30 days5GB30DNI30 DAYS OFF

Doplnkové Balíky k Predplatenke auto-renew. To disable auto-renewal, text the Deactivation Code to 12330.

Slovak Telekom Doplnkové Balíky k Predplatenke Data Packages for Prepaid
EU Roaming – Slovak Telekom (formerly T-Mobile)

You can use your Slovak Telekom allowances in the following EU/EEA member states without paying roaming fees:

  • Andorra
  • Austria
  • Azores
  • Belgium
  • Bulgaria
  • Canary Islands
  • Croatia
  • Cyprus
  • Czech Republic
  • Denmark
  • Estonia
  • Finland
  • France
  • French Guiana
  • Germany
  • Gibraltar
  • Greece
  • Guadeloupe
  • Hungary
  • Iceland
  • Ireland
  • Italy
  • Latvia
  • Liechtenstein
  • Lithuania
  • Luxembourg
  • Madeira
  • Malta
  • Martinique
  • Mayotte
  • Monaco
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Réunion
  • Romania
  • Saint Barthélemy
  • Saint Martin
  • Slovenia
  • Spain
  • Sweden

Be aware that, in some cases, the EU/EEA roaming allowance is lower than the domestic allowances.

APN/Internet Settings – Slovak Telekom (formerly T-Mobile)

  • Name: Telekom Internet
  • APN: internet

Note: leave anything not mentioned above untouched.

Jump back to the Table of Contents.

Support Me on Ko-Fi Orange


Orange Slovakia

Orange Logo
© Orange

Orange Slovakia, just Orange, is the second-largest mobile operator in Slovakia.

However, it is often the largest mobile operator, as the subscriber numbers between Orange and Slovak Telekom (formerly T-Mobile) are minimal.

Orange, as a company, is active in other countries in Africa, the Caribbean, Europe & the Middle East.

Orange uses the following frequencies:

  • 2G: 900 MHz & 1800 MHz
  • 3G: 900 MHz & 2100 MHz
  • 4G/LTE: 800 MHz (Band 20), 1800 MHz (Band 3) & 2600 MHz (Band 7)
  • 5G NR: 1800 MHz (n3) & 3500 MHz (n78) – not for prepaid customers (yet)
  • VoLTE: Yes
  • VoWiFi: Yes

This is what you will learn about Orange:

* Coverage
* How to Get an Orange SIM Card & SIM Card Price
* Topping Up Options & Methods + Balance Check
* Plans & Packages
* APN/Internet Settings

Coverage – Orange Slovakia

Orange has the best 4G/LTE availability and coverage experience.

This was also confirmed by Opensignal.

Below is Orange's coverage map produced by Speedtest:

However, click here to see Orange's official coverage map.

SIM Card Price – Orange Slovakia

You can get an Orange SIM card for 1 EUR (Go €1) or 2 EUR with 2 EUR credit and 1 GB of data (Prima Dáta) in Orange stores. SIM cards are not sold at Bratislava-M.R. Štefánik Airport (BTS), but the AVION Shopping Park Bratislava mall near the airport does have an Orange store.

Orange Slovakia SIM Card Prices
The SIM card in the middle is blocked out because it is exclusively for children. If you are reading this guide, it does not apply to you 🤪
  • Find out how much SIM cards cost in every country, including data-only SIM cards and tourist SIM cards, offered by each mobile operator + information about starter benefits (lookup tool)
SIM Card Prices Worldwide Tool by Phone Travel Wiz

It is also possible to get an Orange eSIM for the same price as a regular SIM card.

You may want to get a travel eSIM for Slovakia, which can be cheaper than getting a SIM card from Orange (in some cases).

Especially when getting a Europe-wide eSIM if you do not stay in just Slovakia or a global eSIM valid for up to a year if you want one eSIM to work practically worldwide.

My Slovakia eSIM buying guide analyzes various eSIM options of eSIM providers I have tested extensively worldwide.

Here is a quick introduction to them:

  • Airalo: Dobrý deň! (Slovakia only), Eurolink (39 countries in Europe) & Discover+ (130 countries worldwide + call and text feature) – use code NEWMAY15 (15% off – first-time users only) or AIRALOMAY10 (10% off)
  • Alosim: Slovakia & Europe (32 countries) – use code PTW (5% off – no limits)
  • Holafly: Slovakia & Europe (32 countries) – these eSIMs have unlimited data + calling feature – use code PHONETRAVELWIZ (5% off – no limits)
  • Nomad: Slovakia, Europe (up to 35 countries) & Global (up to 139 countries) – use code ADU123 (3 USD off – first-time users only)

For more information, such as the prices and data allowances, check out my Slovakia eSIM buying guide.

Buying an eSIM for Slovakia Guide (logos of 4KA, O2, Holafly, T-Mobile, SimOptions, Nomad, Eurolink, Airalo, Orange, Dobrý deň! & Alosim)

But let's continue with Orange for now.

Note that Orange offers VoLTE (Voice over LTE (4G)) if your phone supports it and you have enabled it in the settings.

Oh, you can also use VoWiFi (Voice over WiFi).

Support Me on Ko-Fi Orange

Top-Up, Recharge & Balance Check – Orange Slovakia

Orange top-up vouchers are sold in Orange stores, grocery stores, corner shops & electronics shops throughout Slovakia.

The following (online) Orange top-ups are available:

  • 7 EUR
  • 12 EUR
  • 15 EUR
  • 20 EUR
  • 30 EUR
  • 50 EUR

To top up your Orange SIM card, call 444, select option 9, and enter the VoucherCode.

For example, if your voucher code is 123456, you would call 444, select option 9, and enter 123456.

You can also tell the salesperson how much credit you want, your phone number, pay, and they will top up your SIM card with the POS system.

You can also recharge online with (international/EU) debit and credit cards.

You can also top up and check your balance on the Môj Orange (My Orange) app (Android/iOS).

Orange Slovakia Môj Orange App
© Orange Slovakia

Packages, Plans, Bundles & Offers – Orange Slovakia

Orange has only one data-featured prepaid plan: Dátové Balíky (Data Packages). It is, as the name implies, a data plan (without 5G NR access).

I will list all the prices in EUR (Euro).

To convert EUR to your currency (let's say USD) with up-to-date exchange rates, use the Wise Currency Converter tool.

Wise Currency Exchange Banner
© Wise

Text the Activation Code to 445 to activate Dátové Balíky:

PriceDataEU/EEA DataValidityActivation CodeDeactivation Code
1 EUR200 MBShared with data allowance30 days200 A200 D
2 EUR1 GBShared with data allowance7 daysTYZ1GB ATYZ1GB D
2 EUR“Unlimited”, 5 GB high-speed 1Shared with data allowanceUntil midnightDEN5GB ADEN5GB D
4 EUR1 GBShared with data allowance30 days1GB A1GB D
6 EUR2 GBShared with data allowance30 days2GB A2GB D
8 EUR5 GBShared with data allowance30 daysMES5GB AMES5GB D
10 EUR10 GBShared with data allowance30 days10GB A10GB D

1 unlimited data @ 3 Mbps after using 5 GB

Dátové Balíky auto-renews. To disable auto-renewal, text the Deactivation Code to 445.

Orange Slovakia Dátové Balíky Plan
EU Roaming – Orange Slovakia

You can use your Orange allowances in the following EU/EEA member states without paying roaming fees:

  • Aland Islands
  • Azores
  • Austria
  • Belgium
  • Bulgaria
  • Canary Islands
  • Croatia
  • Cyprus
  • Czech Republic
  • Denmark
  • Estonia
  • Finland
  • France
  • French Guiana
  • Germany
  • Gibraltar
  • Greece
  • Guadeloupe
  • Hungary
  • Iceland
  • Ireland
  • Italy
  • Latvia
  • Liechtenstein
  • Lithuania
  • Luxembourg
  • Madeira
  • Malta
  • Martinique
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Réunion
  • Romania
  • Saint Barthélemy
  • Saint Martin
  • San Marino
  • Slovenia
  • Spain
  • Sweden
  • Switzerland
  • United Kingdom

As Orange does not have dedicated EU/EEA roaming allowances, you can use your full allowance without restrictions in other EU/EEA member states.

APN/Internet Settings – Orange Slovakia

  • Name: Orange Internet
  • APN: internet

Note: leave anything not mentioned above untouched.

Jump back to the Table of Contents.

Support Me on Ko-Fi Orange


O2 Slovakia

O2 Logo
© O2

O2 Slovakia, just O2 but officially O2, is the third-largest mobile operator in Slovakia.

While the O2 brand is part of Telefónica, a Spanish telecommunications company active in the Americas (as Altice, Movistar & Vivo) and Europe (as Bouygues Telecom, Movistar & O2), O2 in Slovakia is owned by PFF.

It is a Czech-based investment firm that also runs Telenor (officially Norwegian) in Bulgaria, Hungary, Montenegro & Serbia.

O2 uses the following frequencies:

  • 2G: 900 MHz & 1800 MHz
  • 3G: 900 MHz & 2100 MHz
  • 4G/LTE: 800 MHz (Band 20) & 1800 MHz (Band 3)
  • 5G NR: 1800 MHz (n3) & 3700 MHz (n78)
  • VoLTE: Yes
  • VoWiFi: Yes

This is what you will learn about O2

* Coverage
* How to Get an O2 SIM Card & SIM Card Price
* Topping Up Options & Methods + Balance Check
* Plans & Packages
* APN/Internet Settings

Coverage – O2 Slovakia

O2 has the best 4G/LTE availability.

This was also confirmed by Opensignal.

Below is O2's coverage map produced by Speedtest:

However, click here to see O2's official coverage map.

SIM Card Price – O2 Slovakia

You can get an O2 SIM card, called Vol'nost', for 2 EUR with 2 EUR credit in O2 stores. SIM cards are not sold at Bratislava-M.R. Štefánik Airport (BTS), but the AVION Shopping Park Bratislava mall near the airport does have an O2 store.

O2 Slovakia Vol'nost' Freedom SIM Card
© O2 Slovakia
  • Find out how much SIM cards cost in every country, including data-only SIM cards and tourist SIM cards, offered by each mobile operator + information about starter benefits (lookup tool)
SIM Card Prices Worldwide Tool by Phone Travel Wiz

It is also possible to get an O2 eSIM for the same price as a regular SIM card.

You should consider getting a travel eSIM for Slovakia because they can sometimes be cheaper than getting a SIM card from O2.

Especially if you get a Europe-wide eSIM or a global eSIM.

I discuss various eSIM options of eSIM providers for Slovakia in my Slovakia eSIM buying guide, which are:

  • Airalo: Dobrý deň! (Slovakia only), Eurolink (39 countries in Europe) & Discover+ (130 countries worldwide + minutes and SMS) – use code NEWMAY15 (15% off – first-time users only) or AIRALOMAY10 (10% off)
  • Alosim: Slovakia & Europe (32 countries) – use code PTW (5% off – no limits)
  • Holafly: Slovakia & Europe (32 countries) – unlimited data eSIMs which allow for (limited) calls – use code PHONETRAVELWIZ (5% off – no limits)
  • Nomad: Slovakia, Europe (up to 35 countries) & Global (up to 139 countries) – use code ADU123 (3 USD off – first-time users only)

As I said, check out my Slovakia eSIM buying guide for more information, as I have to continue with O2 for now.

Buying an eSIM for Slovakia Guide (logos of 4KA, O2, Holafly, T-Mobile, SimOptions, Nomad, Eurolink, Airalo, Orange, Dobrý deň! & Alosim)

Note that O2 offers VoLTE (Voice over LTE (4G)) if your phone supports it and you have enabled it in the settings.

Oh, you can also use VoWiFi (Voice over WiFi).

Support Me on Ko-Fi Orange

Top-Up, Recharge & Balance Check – O2 Slovakia

O2 top-up vouchers are sold in O2 stores, grocery stores, corner shops & electronics shops throughout Slovakia.

The following (online) O2 top-ups are available:

  • 8 EUR
  • 10 EUR
  • 15 EUR
  • 20 EUR
  • 30 EUR

To top up your O2 SIM card, dial *133*VoucherCode#.

For example, if your voucher code is 123456, you would dial *133*123456#.

You can also tell the salesperson how much credit you want, your phone number, pay, and they will top up your SIM card with the POS system.

You can also recharge online with debit and credit cards – only Czech Republic- and Slovakia-issued cards are accepted.

Dial *100*# or text SPOTREB to 99222 to check your O2 balance.

You can also top up and check your balance on the Moje O2 SK (My O2 Slovakia) app (Android/iOS).

O2 Slovakia Moje O2 SK App
© O2 Slovakia

Packages, Plans, Bundles & Offers – O2 Slovakia

O2 has only one data-featured prepaid plan: Dátové Balíky (Data Packages) with 5G NR access.

Although I may have been lucky with 5G NR access, as O2 called it a promotion in one of the text messages they sent me.

However, speeds are restricted to 25 Mbps download and 15 Mbps upload.

On 5G NR, I managed to hit 625.72 Mbps in March 2022.

I will list all the prices in EUR (Euro).

To convert EUR to your currency (let's say USD) with up-to-date exchange rates, use the Wise Currency Converter tool.

Wise Currency Exchange Banner
© Wise

Text the Activation Code to 99222 to activate Dátové Balíky:

PriceDataSpeed (Down/Up)ValidityActivation Code
0.75 EUR500 MB25 Mbps/15 Mbps1 day500MB
1 EUR1 GB 125 Mbps/15 Mbps1 day1GB
2 EUR1 GB25 Mbps/15 Mbps7 days1GB1 A
3 EUR1 GB25 Mbps/15 Mbps28 days1GB4 A
5 EUR2 GB25 Mbps/15 Mbps28 days2GB4 A

1 up to 670 MB can be used in the EU/EEA. All the other plans have no EU/EEA allowance limit

EU Roaming – O2 Slovakia

You can use your Slovak Telekom allowances in the following EU/EEA member states without paying roaming fees:

  • Austria
  • Azores
  • Belgium
  • Bulgaria
  • Canary Islands
  • Croatia
  • Cyprus
  • Czech Republic
  • Denmark
  • Estonia
  • Finland
  • France
  • French Guiana
  • Germany
  • Gibraltar
  • Greece
  • Guadeloupe
  • Hungary
  • Iceland
  • Ireland
  • Italy
  • Latvia
  • Liechtenstein
  • Lithuania
  • Luxembourg
  • Madeira
  • Malta
  • Martinique
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Réunion
  • Romania
  • Saint Barthélemy
  • Saint Martin
  • San Marino
  • Slovenia
  • Spain
  • Sweden
  • United Kingdom
  • Vatican City

As O2 does not have dedicated EU/EEA roaming allowances (except for one plan), you can use your full allowance without restrictions in other EU/EEA member states.

APN/Internet Settings – O2 Slovakia

  • Name: O2 INTERNET
  • APN: o2internet

Note: leave anything not mentioned above untouched.

Jump back to the Table of Contents.

Support Me on Ko-Fi Orange


4ka (by Swan Mobile)

4ka Slovakia Logo
© 4ka

4ka by Swan Mobile is the smallest mobile operator in Slovakia.

Swan also offers fixed broadband services. It started its mobile brand in 2015.

While it still has the worst network, 4ka is the cheapest mobile operator in Slovakia.

4ka uses the following frequencies:

  • 2G: 900 MHz & 1800 MHz
  • 3G: 900 MHz & 2100 MHz
  • 4G/LTE: 1800 MHz (Band 3)
  • 5G NR: 1800 MHz (n3) & 3700 MHz (n78)
  • VoLTE: Yes
  • VoWiFi: No

This is what you will learn about 4ka:

* Coverage
* How to Get a 4ka SIM Card & SIM Card Price
* Topping Up Options & Methods + Balance Check
* Plans & Packages
* APN/Internet Settings

Coverage – 4ka (by Swan Mobile)

4ka has the worst coverage in Slovakia.

Below is 4ka's coverage map produced by Speedtest:

However, click here to see 4ka's official coverage map.

SIM Card Price – 4ka (by Swan Mobile)

You can get a 4ka SIM card for 4 EUR with 4 EUR credit in 4ka stores and post offices stores. SIM cards are not sold at Bratislava-M.R. Štefánik Airport (BTS), but the AVION Shopping Park Bratislava mall near the airport does have a 4ka partner store and a post office selling SIM cards.

4ka Slovakia SIM Card
© 4ka
  • Find out how much SIM cards cost in every country, including data-only SIM cards and tourist SIM cards, offered by each mobile operator + information about starter benefits (lookup tool)
SIM Card Prices Worldwide Tool by Phone Travel Wiz

It is also possible to get a 4ka eSIM for the same price as a regular SIM card.

Currently, 4ka does not have a list of devices that can use its eSIM.

But I suspect the standard Google Pixel, iPhone, Huawei (Mate) P40 (Pro) & Samsung (Galaxy (Note))/Flip can use 4ka's eSIMs.

You can consider getting a travel eSIM for Slovakia, which can, in specific scenarios, be cheaper than getting a SIM card from 4ka.

Especially if you get a Europe-wide eSIM (for when you visit at least two or more supported European countries) or a global eSIM (for frequent travelers visiting multiple continents).

In my Slovakia eSIM buying guide, I analyze various eSIM options of eSIM providers I have tested extensively worldwide.

But I will introduce them here quickly:

  • Airalo: Dobrý deň! (Slovakia only), Eurolink (39 countries in Europe) & Discover+ (130 countries worldwide + up to 200 worldwide minutes & 200 worldwide SMS) – use code NEWMAY15 (15% off – first-time users only) or AIRALOMAY10 (10% off)
  • Alosim: Slovakia & Europe (32 countries) – use code PTW (5% off – no limits)
  • Holafly: Slovakia & Europe (32 countries) – all variants in both options include unlimited data + up to 120 Europe-wide calls – use code PHONETRAVELWIZ (5% off – no limits)
  • Nomad: Slovakia, Europe (30 or 35 countries, depending on the variant) & Global (109 or 139 countries, depending on the variant) – use code ADU123 (3 USD off – first-time users only)

Once again, check out my Slovakia eSIM buying guide to learn more about these eSIM options.

Buying an eSIM for Slovakia Guide (logos of 4KA, O2, Holafly, T-Mobile, SimOptions, Nomad, Eurolink, Airalo, Orange, Dobrý deň! & Alosim)

For now, I will continue with 4ka.

Note that 4ka offers VoLTE (Voice over LTE (4G)) if your phone supports it and you have enabled it in the settings but no VoWiFi (Voice over WiFi).

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Top-Up, Recharge & Balance Check – 4ka (by Swan Mobile)

4ka top-up vouchers are sold in 4ka stores, grocery stores, corner shops & electronics shops throughout Slovakia.

The following (online) 4ka top-ups are available:

  • 4 EUR
  • 8 EUR
  • 10 EUR
  • 12 EUR
  • 15 EUR
  • 16 EUR
  • 20 EUR
  • 30 EUR

To top up your 4ka SIM card, dial *111*VoucherCode#.

For example, if your voucher code is 123456, you would dial *111*123456#.

You can also tell the salesperson how much credit you want, your phone number, pay, and they will top up your SIM card with the POS system.

You can also recharge online with (international/EU) debit and credit cards.

Dial *55# to check your 4ka balance.

You can also top up and check your balance on the Moa 4ka (My 4ka) app (Android/iOS).

4ka Slovakia Moja 4ka app
© 4ka

Packages, Plans, Bundles & Offers – 4ka (by Swan Mobile)

4ka has two data-featured prepaid plans: Sloboda/Freedom (combo) & Dátové Balíky (Data Package).

I will list all the prices in EUR (Euro).

To convert EUR to your currency (let's say USD) with up-to-date exchange rates, use the Wise Currency Converter tool.

Wise Currency Exchange Banner
© Wise

Click on the links above to jump to the plan you are interested in.

Sloboda (Freedom)- 4ka (by Swan Mobile)

The Sloboda (Freedom) are combo plan with data (with 5G NR access), minutes & SMS.

Text the Activation Code to 950 to activate Sloboda:

PricePlanDataEU/EEA DataLocal/EU MinutesLocal/EU SMSValidityActivation CodeDeactivation Code
6 EURSloboda 1002 GBShared with data allowance100 minutesShared with call allowance30 daysS100STOP or PAUSAL STOP
10 EURSloboda 3002 GBShared with data allowance300 minutesShared with call allowance30 daysS300STOP or PAUSAL STOP
11 EURSloboda 100+12 GB6.63 GB100 minutesShared with call allowance30 daysS100+STOP or PAUSAL STOP
15 EURSloboda 300+17 GB6.63 GB300 minutesShared with call allowance30 daysS300+STOP or PAUSAL STOP
15 EURSloboda DátaUnlimitedN/AN/AN/A30 daysSDATASTOP or PAUSAL STOP
16 EURSloboda HlasN/AN/AUnlimitedShared with call allowance30 daysSHSTOP or PAUSAL STOP
18 EURSloboda Nekonečno2 GBShared with data allowanceUnlimitedShared with call allowance30 daysSNSTOP or PAUSAL STOP
23 EURSloboda Nekonečno +Unlimited6.63 GBUnlimitedShared with call allowance30 daysSN+STOP or PAUSAL STOP

Sloboda auto-renew. To disable auto-renewal, text STAV to 950.

4ka Slovakia Sloboda (Freedom) Plan
Dátové Balíky (Data Package) – 4ka (by Swan Mobile)

The Dátové Balíky (Data Package) are, as the name implies, data plans (with 5G NR access).

Text the Activation Code to 950 to activate Dátové Balíky:

PricePlanDataEU/EEA DataValidityActivation CodeDeactivation Code
1.50 EURDenné Nekonečno15 GB1.39 GB1 dayDNN/A
2 EURGiga S Obnovou1 GBShared with data allowance30 daysGIGAGIGA STOP
5 EURData Navyše pre Sloboda 10010 GB4.63 GB30 daysAutomatic ActivationSTOP
5 EURData Navyše pre Sloboda 30015 GB4.63 GB30 daysS300+STOP
5 EURData Navyše pre Sloboda UnlimitedUnlimited4.63 GB30 daysSN+STOP

Dátové Balíky auto-renew. To disable auto-renewal, text the Deactivation Code to 950.

4ka Slovakia Dátové Balíky Plan
EU Roaming – 4ka (by Swan Mobile)

You can use your 4ka allowances in the following EU/EEA member states without paying roaming fees:

  • Austria
  • Azores
  • Belgium
  • Bulgaria
  • Canary Islands
  • Croatia
  • Cyprus
  • Czech Republic
  • Denmark
  • Estonia
  • Finland
  • France
  • French Guiana
  • Germany
  • Gibraltar
  • Greece
  • Guadeloupe
  • Hungary
  • Iceland
  • Ireland
  • Italy
  • Latvia
  • Liechtenstein
  • Lithuania
  • Luxembourg
  • Madeira
  • Malta
  • Martinique
  • Netherlands
  • Norway
  • Poland
  • Portugal
  • Réunion
  • Romania
  • Saint Barthélemy
  • Saint Martin
  • San Marino
  • Slovenia
  • Spain
  • Sweden
  • United Kingdom
  • Vatican City

Be aware that, in some cases, the EU/EEA roaming allowance is lower than the domestic allowances.

APN/Internet Settings – 4ka (by Swan Mobile)

  • Name: 4ka Internet
  • APN: internet

Note: leave anything not mentioned above untouched.

Jump back to the Table of Contents.

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The Preferred Way to Stay Connected When Traveling in Slovakia

Getting a SIM card from Slovak Telekom, Orange, or 4k would do you well when considering a Slovak SIM card.

Going to other places around the world? You should also check out my SIM card buying guides for other destinations worldwide.