eSIM Providers in Slovakia: Slovak Telekom, O2, 4ka and Travel eSIMs

Looking for an eSIM for Slovakia? If you're visiting, the simplest option is a travel eSIM: you buy it online, install it at home and it connects when you arrive. If you live in Slovakia or want a Slovak number, the main operators with eSIM include Slovak Telekom, O2 Slovakia and 4ka. You'll need a Slovak line from them first, and buying one involves an ID check. Coming from another EU country? Your home plan may already work in Slovakia at no extra cost. This guide covers each option so you can pick the right one for your trip.

Just visiting? These Slovakia eSIMs are data only, so you keep your home number for calls and texts. Pick the one that matches the length of your trip.

Data-only plans for Slovakia · 5 GB, 10 GB or 20 GB · See all Slovakia eSIMs · Visiting more of Europe? See Europe eSIMs

Slovak mobile operators with eSIM

Apple's list of carriers that support eSIM on iPhone includes O2 and Slovak Telekom for Slovakia (Apple: carriers that offer eSIM service). 4ka offers eSIM too, according to its own website. Here's a quick overview:

• Slovak Telekom: eSIM for monthly plans and prepaid cards, in the Telekom app, the e-shop, any Telekom store or by phone. On iPhone, it supports carrier activation and eSIM Quick Transfer.
• O2 Slovakia: free eSIM when you order a new plan in the O2 app. Switching a plastic SIM to eSIM is done in an O2 store.
• 4ka: eSIM for existing 4ka numbers, requested online and sent to you by email.
• Travel eSIMs: sold online by providers like SimOptions. No Slovak number needed, no store visit, ready before you travel.

Here's what each operator says about its eSIM.

Slovak Telekom eSIM

Slovak Telekom explains its eSIM on its eSIM help page. According to Telekom:

• Where to get it: in the Telekom app, in the e-shop, in any Telekom store, or by calling the free customer line on 0800 123 456.
• Prepaid works too: you can use an eSIM with monthly plans, mobile internet, and the prepaid cards Predplatenka, Easy and Juro.
• Cost: the eSIM is free with a new monthly plan, and swapping a plastic SIM for an eSIM is free of charge.
• How you get it: you receive a QR code to scan with your phone. Your old plastic SIM stops working once the eSIM is ready, so make sure you're on Wi-Fi.
• New phone: you can move your eSIM between two iPhones, and on some Samsung and Google Pixel phones, during setup.

One thing to know: each QR code works on one device only. If you delete the eSIM from your phone, you can't download it again with the same code, and you need to ask Telekom for a new eSIM.

O2 Slovakia eSIM

O2 Slovakia describes its eSIM on its eSIM page. Here's how it works, according to O2:

• New line: order a new plan in the O2 app and you get the eSIM free. It installs and activates once your order is complete.
• Switching from a plastic SIM: go to any O2 store. You get a card with a printed eSIM QR code, and there's a fee according to the O2 price list.
• Installing: scan the QR code in your phone's settings. O2's page has step-by-step instructions for iPhone and several Android brands.
• PIN and PUK: the PIN is turned off and set to 0000. Keep the card with the QR code, because it shows your PUK code. If you enter the wrong PIN 3 times, the eSIM locks and you need the PUK.

Deleted your O2 eSIM by mistake? O2 says you can scan the same QR code again if you kept the card or email. If you lost it, an O2 store can issue a new eSIM for a fee.

4ka eSIM

4ka offers eSIM to customers who already have a 4ka phone number (4ka: eSIM). According to 4ka:

1. Get a 4ka number. Order a SIM in the 4ka e-shop, at a Slovak Post office (Slovenská pošta) or at a 4ka partner store.
2. Check your phone supports eSIM.
3. Request the eSIM online at 4ka.sk in the "Moja zóna" section. You enter your 4ka number, the PUK code, an SMS code sent to your number and your email address.
4. Scan the QR code from the email while your phone is connected to the internet.

Each 4ka QR code works only once. If you lose, replace or delete the eSIM, you need to buy a new eSIM for the same number.

Can tourists get a local eSIM in Slovakia?

It's possible, but it takes a few steps. All three operators above give you an eSIM for a Slovak line, so you need to get that line first. And when you buy a prepaid SIM, Slovak law requires the seller to check your identity. According to EURAXESS Slovakia, sellers ask EU citizens for a passport or ID card, and other buyers for a Slovak residence permit (EURAXESS Slovakia: daily life).

That's fine if you're moving to Slovakia or staying for months. For a holiday or a business trip, a travel eSIM you buy online before you leave is usually quicker.

Do you need a Slovak eSIM if you live in the EU?

Probably not. Under the EU's "roam like at home" rules, you use your home plan in Slovakia the same way you use it at home. The rules cover the EU plus Iceland, Liechtenstein and Norway, as well as Moldova and Ukraine. Roaming should be occasional, so a fair use policy can apply if you spend more time abroad than at home (Your Europe: mobile roaming costs).

The UK isn't included, so check your UK operator's roaming terms. If you're coming from the UK, the US, Canada, Australia or anywhere else outside the EU, roaming on your home plan can get expensive. That's where a travel eSIM helps.

Slovakia travel eSIM: get connected before you travel

A travel eSIM is a data plan you buy online. You get a QR code by email, install it on Wi-Fi at home, and it connects when you arrive. Here is what the SimOptions Slovakia plans include, according to their plan details:

• Data only: no Slovak phone number, no calls or SMS. You call and message with apps like WhatsApp, FaceTime or iMessage.
• Speed: 4G and 5G.
• Activation: once installed, the eSIM activates automatically when you reach Slovakia.
• No paperwork: no Slovak line, no ID check in a shop.
• Top-ups: available if you run low on data.
• Expiry: if you don't use the eSIM within a year, it becomes invalid.
• Coverage: Slovakia only. Going on to Vienna, Budapest, Prague or Kraków? Pick a Europe eSIM instead.

How much data do you need for Slovakia?

The Slovakia plans range from 1 GB for 3 days to 100 GB for 180 days. As a rough guide:

• A weekend in Bratislava: 1 GB to 3 GB for maps, messages and tickets.
• Up to a week: 5 GB or 10 GB for 7 days.
• One to two weeks, for example hiking in the High Tatras: 20 GB for 15 days.
• A month or longer: 50 GB for 30 days, or the larger plans for long stays.

Need a phone number, or visiting more countries?

Slovakia is often one stop on a longer trip through Central Europe. If that's you, or you need calls and texts, Travel Basic+ from Bouygues Telecom fits better. It covers 46 destinations, including Slovakia and its neighbours Austria, Czech Republic, Hungary and Poland, and comes with a French (+33) number with unlimited calls and SMS within Europe for 15 days. More options in our guide to Europe eSIMs with a phone number.

How to set up your Slovakia eSIM

1. Check your phone. It must support eSIM and be unlocked. Dial *#06#: if you see an EID, your phone supports eSIM. More in our guide to checking eSIM compatibility.
2. Buy your plan and wait for the QR code by email.
3. Install it on Wi-Fi before you travel. On iPhone, open the Camera app, scan the QR code and follow the steps to add the eSIM (Apple: Set up eSIM on iPhone). Step by step for iPhone and Android: how to install an eSIM.
4. Label the line "Slovakia" so you can tell it apart from your home line.
5. When you arrive, make the travel eSIM your data line and turn on data roaming for it.

Not connecting after you arrive? Go through our eSIM activation fixes.

Local eSIM or travel eSIM: which one is right for you?

A Slovak Telekom, O2 or 4ka eSIM fits if

• You live in Slovakia or stay for several months.
• You need a Slovak phone number for banks, apps or local services.
• You're fine with buying a line in person and showing your ID.

A travel eSIM fits if

• You're on holiday or a business trip of a few days to a few weeks.
• You want data the moment you arrive, for maps, trains and messages.
• You'd rather skip the shop and the ID check.
• You want to keep your home number on your phone at the same time.

Comparing travel eSIM options for Slovakia? See our list of eSIMs for Slovakia. Crossing the border? Read about eSIM providers in the Czech Republic and eSIM providers in Austria.

FAQs

Which eSIM should I get for Slovakia?

If you're visiting, a travel eSIM is the simplest choice. You buy it online, install it before you travel and it connects when you arrive. If you live in Slovakia or need a Slovak number, pick a local operator such as Slovak Telekom, O2 or 4ka.

Does O2 Slovakia offer eSIM?

Yes. You get a free eSIM when you order a new plan in the O2 app. To swap a plastic SIM for an eSIM, go to an O2 store, where a fee applies.

Does Slovak Telekom offer eSIM?

Yes, for monthly plans and the prepaid cards Predplatenka, Easy and Juro. You can get it in the Telekom app, e-shop or stores. On iPhone, Telekom supports eSIM Quick Transfer.

Does 4ka offer eSIM?

Yes, for existing 4ka numbers. You request it online with your number, PUK code and email address, and 4ka sends the QR code by email.

Can I buy a Slovak eSIM online as a tourist?

It's not straightforward. The local operators give you an eSIM for a Slovak line, and buying a prepaid SIM involves an ID check. A travel eSIM from SimOptions is bought online with no Slovak line needed.

Do I get a Slovak phone number with a travel eSIM?

No. The SimOptions Slovakia plans are data only. If you need a number, Travel Basic+ and the My European eSIM plans come with a French (+33) number for calls and SMS within Europe.

Does a Slovakia eSIM work in other countries?

Not the SimOptions Slovakia plans: they cover Slovakia only. If you're also visiting Austria, Hungary, Czech Republic or Poland, a Europe eSIM covers your whole trip.