Free eSIM for Czech Republic 
3 GB of free mobile data across the Czech Republic — from Prague's Old Town cobblestones to Český Krumlov's river bend. Install before you board, walk out of Václav Havel Airport already online, and skip the Vodafone shop queue on Wenceslas Square.
Free for new users · Credit card for identity verification only — never charged · Valid 3 days
Why an eSIM beats a Czech prepaid SIM
Buying a physical SIM in Czechia now requires photo-ID registration under the 2022 anti-fraud law — you'll hand over your passport at any O2 or Vodafone branch and wait while they scan it. Tourist plans from Vodafone CZ hover around 499 CZK for 10 GB, which is fine value but useless if you land at 11pm when the stores are shut. A 99esim profile bypasses the registration, activates in under two minutes, and costs nothing for your first 3 GB — more than enough to map your way from Letná Park to the Charles Bridge and back.
- No passport registration at a Czech telco counter
- Pay in euros or dollars — no scrambling for koruna on day one
- Works seamlessly across the Schengen border into Germany, Austria, Poland
- Keep your home number live for 2FA and WhatsApp while you travel
How Czech networks handle 99esim
99esim rides on T-Mobile CZ's network, which has the densest rural footprint among the three Czech operators and inherited the legacy RadioMobil infrastructure across Bohemia and Moravia. You'll see 5G in Prague, Brno, Ostrava, Plzeň and along the D1 motorway. LTE fills the rest, including Šumava forests and the wine country around Mikulov where tourist maps show blank space.
Arriving at a Czech airport
Václav Havel handles 90% of tourist arrivals and has full 5G at every gate. Brno and Ostrava are smaller regional fields but still covered end-to-end. Your eSIM connects the moment airplane mode comes off — by the time your bag hits the belt, you'll have Maps open.
5G is strongest in Terminal 2 (Schengen). The 119 bus to Nádraží Veleslavín metro keeps signal throughout — faster and cheaper than a taxi at 40 CZK.
Compact single-terminal layout with solid LTE everywhere. The E76 bus to Brno main station runs on a 20-minute schedule and stays online the whole way.
Small airport with only a handful of daily flights but coverage is excellent. The airport shuttle to Svinov train station holds signal through the industrial zone.
Mostly Russian charter traffic historically; now mixed. 4G signal is reliable at the terminal and on the spa-town shuttle.
Secondary field used by Smartwings and seasonal charters. The drive into town on Route 37 stays connected on T-Mobile the full 8 km.
Where your free eSIM works best
What 3 GB actually gets you in Czech Republic
Prague is a walk-everywhere city, so Maps eats more of your allowance here than, say, a beach trip. Here's what 3 GB realistically covers on a long weekend:
Czech-specific travel tips
Prague Metro tunnel coverage
All three lines (A, B, C) were retrofitted with DAS between 2018 and 2022 — expect steady 4G in the tunnels on newer sections. Line C between Vyšehrad and Hlavní nádraží is the most reliable; the deeper stretches on Line A near Staroměstská can briefly drop.
Český Krumlov's hill problem
The town sits in a horseshoe bend of the Vltava surrounded by steep hills, which creates shadow spots for any single carrier. T-Mobile covers the castle and main square; if you wander up toward Křížový vrch the signal thins — download the town map offline before the day trip.
Czech trains and EC service
ČD's EuroCity and RegioJet trains have reliable coverage along the Prague–Brno and Prague–Ostrava corridors. The Prague–Berlin EC line drops briefly in the Děčín tunnels. WiFi on board is free on RegioJet but often slower than your eSIM.
Beer-garden-heavy nightlife
Prague's summer beer gardens (Letná, Riegrovy sady, Prokopské údolí) are all outside the city core and sit on hilltops or in parks. Coverage is excellent — the tree canopy doesn't interfere with LTE the way buildings do.
Crossing into Austria or Germany
Schengen means no border stop, but your phone will briefly roam before locking onto the new country's network. 99esim handles the handoff automatically — you'll see the operator name change but no data interruption.
Travelers who used 99esim in Czech Republic
"Spent five days in Prague and Český Krumlov. eSIM was working before I even reached passport control at PRG. Maps never faltered in the Old Town maze."
"Train from Prague to Brno, then Brno to Vienna — eSIM held through the whole route. Only saw a 20-second drop right at the border tunnel."
"Beer garden hopping in Letná and Riegrovy sady. Signal was perfect even at sunset when everyone's on their phones posting sunset photos."
Frequently asked — Czech Republic edition
Does the free eSIM work in the Prague Metro?
Yes, on all three lines. Prague's DP transport authority finished the distributed antenna rollout in 2022, so 4G now runs in every tunnel section. You may see brief drops on the oldest Line A stretches, but reconnection happens within a station or two.
Will my phone register under the anti-fraud law?
No. The 2022 Czech SIM registration law applies only to physical SIM cards sold within the Czech Republic. Since your 99esim profile is issued internationally, you are exempt from the passport-scan requirement.
Can I use the eSIM when I cross into Germany or Austria?
Yes. The plan covers 39 European countries including all Schengen neighbours — Germany, Austria, Poland, Slovakia. No menu switching, no new profile. You'll see the operator name change on your status bar and that's it.
Is 5G included in the free plan?
Yes. If your device supports 5G and you're in a covered area — Prague, Brno, Ostrava, Plzeň centres plus the D1 motorway — the eSIM uses 5G automatically. It counts the same per MB as 4G.
Does it work in Český Krumlov?
Yes, in the town centre and around the castle. The river bend and steep surrounding hills create patchy spots on secondary streets — the fix is to toggle airplane mode on/off to force a tower handover, or download Maps offline before your day trip from Prague.
What happens when the 3 GB runs out?
You can top up in the 99esim app in under a minute — Czech top-ups start at around €2.99 for 1 GB. No auto-renewal, no card surprises. Your profile stays active for the full 30 days either way.
Free eSIM in other European countries
Your 3 GB works in all 39 countries. Here are a few more popular destinations:
See all 39 countries →
Ready to claim your free 3 GB in Czech Republic?
Install the 99esim app, create a free account, and your data is live in about 90 seconds.