Will data work along the colonnades and up at the Diana Tower?

Yes. The valley-floor colonnades and spa promenade have good 4G and 5G on all three networks. Signal can weaken on the wooded funicular climb and among the tower's hilltop trees, so download maps before you ride up.

Can I use the same eSIM for the wider spa triangle?

Yes. It is one national plan, so the same eSIM covers day-trips to Mariánské Lázně, Loket Castle and the rest of Bohemia's spa triangle, staying connected on the roads and in the towns between them.

Karlovy Vary eSIM.

Name: Karlovy Vary travel eSIM
Brand: My Holiday SIM

Stroll Karlovy Vary's colonnades and sip from the hot springs beneath wooded spa hills.

from $2.15/day · unlimited dataAll of Czech Republic →

Unlimited data5G where availableInstant QR by emailKeep your number

1 · How many days?

10 daysOther:days

2 · How much data?

3GBBest pricevalid 30 days$4.57$0.46/day

Cheapest plan covering your trip: 3GB, valid 30 days.

Travellers (one eSIM each)

1 × 3GB (valid 30 days) · 10-day trip$4.57

Good to know in Karlovy Vary

Direct RegioJet and Flixbus coaches link Prague to Karlovy Vary in about two and a quarter hours — book in-app and reserve a seat, then use your data to find your spa hotel among the town's steep, winding lanes.

Two simple ways to buy

Karlovy Vary eSIM plans: unlimited, or by the GB.

Every Karlovy Vary eSIM from My Holiday SIM is one of two straightforward types. Pick whichever fits how you travel in Karlovy Vary — you can always top up or switch on your next trip.

Traveller streaming and browsing freely on an unlimited-data travel eSIM

Unlimited plans

High-speed data, nothing to count

Priced per day — the longer you stay, the better the daily rate. Ideal for streaming, hotspot and longer trips where you'd rather not watch a data meter. A fair-use policy keeps speeds fast for everyone; see each plan for the detail.

Best for streaming, video calls & hotspot
Great for longer or open-ended trips
One price per day — no GB anxiety

By-the-GB plans

3GB10GB20GB

A set bundle, brilliant value

A fixed data allowance (say 3 GB or 10 GB) valid for your travel days. The best-value pick for lighter trips built around maps, messaging and a bit of browsing. Running low? Top up in a couple of taps — nothing to reinstall.

Best value for lighter, shorter trips
Clear allowance — pay only for what you need
Top up any time from your phone

Compare plans →Not every destination has both types — the picker shows what's available where you're headed.

Plan your data

How much data do you need in Karlovy Vary?

A rough, honest guide to sizing your Karlovy Vary eSIM so you're not guessing. Most travellers in Karlovy Vary are comfortable on 3–5 GB a week — heavy streamers just go Unlimited.

Traveller checking maps and messages on her phone using a My Holiday SIM eSIM

Not sure? Start with a 5 GB plan — you can top up in seconds if you run low.

Light

~1 GB / week

Maps, messaging & email

Google Maps, WhatsApp, email and the odd search. Plenty for a city break where you mostly need directions.

Suits 1–3 GB plans

Balanced

3–5 GB / week

Everyday holiday use

Everything above plus social scrolling, music, cloud photo backups and a little video. Where most travellers land.

Suits 5–10 GB plans

Karlovy Vary eSIM: your local data guide.

This grand spa town threads its colonnades along a narrow river valley, from the geyser-fed Vřídlo to the cast-iron Mill Colonnade and the funicular up to the Diana Tower. A Karlovy Vary eSIM keeps maps, spa bookings and translation to hand as you find the right drinking cup, book a wellness treatment or catch a film during the festival, with the steep hillsides constantly rerouting you.

One eSIM for Karlovy Vary and all of Czech Republic. It's the national Czech Republic eSIM — from $2.15/day with unlimited data, working the same in Karlovy Vary as it does the moment you leave it.

Landing at Václav Havel Airport Prague (PRG)?

Install the QR at home, then switch the eSIM on as you taxi in — you're online before you reach the arrivals hall.

Karlovy Vary eSIM pricingbest-value plan · per day

Days

Per day

Total

Saving

3 days1GB

$0.86

$2.58

—

5 days1GB

$0.52

$2.58

−40%

7 days1GB

$0.37

$2.58

−57%

10 days3GBPopular

$0.46

$4.57

−47%

15 days3GB

$0.30

$4.57

−65%

30 days3GB

$0.15

$4.57

−83%

Each trip length shows the best-value plan that covers it. Total always shown before you pay.

eSIM vs the old ways in Karlovy Vary

eSIM

ROAMING

AIRPORT SIM

Data allowance

Unlimited

Usually capped

Rarely unlimited

Price known upfront

Prepaid

Billed after

Varies at the desk

Ready when you land

Instantly

After the queue

Keep WhatsApp number

SIM swapped

Karlovy Vary eSIM from $2.15/day — the whole bill, agreed before you fly.

On the ground

Where you'll lean on data in Karlovy Vary.

Mill Colonnade (Mlýnská kolonáda)

Compare the spring temperatures, look up their mineral notes and book a spa treatment as you stroll the promenade.

Vřídelní Colonnade & the geyser

Time the hot-spring geyser, translate the wellness signage and message your group across the busy riverside walkways.

Diana Observation Tower

Buy funicular tickets and check the tower's opening hours before the climb above the spa district for valley views.

Grandhotel Pupp & festival quarter

Pull up film-festival screenings, restaurant tables and Moser glass-shop hours around the town's famous grand hotel.

The practical bit

Getting around Karlovy Vary on your eSIM.

Apps you'll want online in Karlovy Vary

RegioJet— Books the frequent Prague–Karlovy Vary coaches and trains with seat reservations.
Flixbus— Alternative intercity buses to Karlovy Vary with live tracking and mobile tickets.
IDOS— Czech journey planner for local buses plus onward trains and coaches from the spa town.
Bolt— Ride-hailing available in Karlovy Vary for hops between hotels and the colonnades.

How long to stay in Karlovy Vary

Most visitors spend one or two days in Karlovy Vary, enough to walk the colonnades, sample the springs, ride up to the Diana Tower and enjoy a spa treatment.

How much data for Karlovy Vary

A relaxed day or two of maps, spa bookings and photos needs little data — about 1-2 GB suits most Karlovy Vary stays, with more only if you stream in the evenings or hotspot a laptop.

Coverage in Karlovy Vary

All three Czech networks give strong signal along the valley-floor colonnades, hotels and main roads; coverage realistically thins on the wooded hills above town, the funicular climb and around the Diana Tower's trees.

Where you're headed

Discover Karlovy Vary.

Karlovy Vary, Czech Republic — skyline and landmarks · stay connected with a Karlovy Vary eSIM from My Holiday SIM

Karlovy Vary, Czech Republic — streets and everyday scenes · stay connected with a Karlovy Vary eSIM from My Holiday SIM

Karlovy Vary, Czech Republic — sights worth exploring · stay connected with a Karlovy Vary eSIM from My Holiday SIM

Karlovy Vary, Czech Republic — a travel moment · stay connected with a Karlovy Vary eSIM from My Holiday SIM

How to activate your Karlovy Vary eSIM.

Full installation guide →

A traveller happily planning her next trip with a map and phone

Buy your plan

Choose your days — the QR code arrives by email in seconds.

A traveller installing her eSIM from the sofa in two minutes

Install at home

Scan the QR on Wi-Fi before you fly. About two minutes, no app needed.

Friends laughing together while packing for a holiday

Fly relaxed

Nothing counts down yet — your days start only at first connection.

A joyful family reunion at the airport arrivals hall

Switch on in Karlovy Vary

Turn the line on when you land. Connected before baggage claim.

New to eSIM in Karlovy Vary?

What is a Karlovy Vary eSIM?

A Karlovy Vary eSIM is a digital SIM that's already built into your phone. Scan one QR code and a local Karlovy Vary data plan installs alongside your home SIM — no plastic, no tray tool, no swap. Your number and WhatsApp stay exactly where they are.

✓ 2-minute install✓ Keep your number✓ Works on phones from 2018+

How eSIM works →Check my phone

A traveller with a backpack smiling at her phone — online abroad with My Holiday SIM

Connected · 5G

Home SIM · calls & WhatsAppHoliday eSIM · unlimited data

30-day refund promiseUnused, uninstalled eSIM? Full refund, no questions.

The price is the billPrepaid and final — roaming charges can't happen.

Days start when you landInstall early with zero pressure; counting begins at first connection.

Humans, 24/7Real people answer, before, during and after the trip.

Peace of mind

Your Karlovy Vary eSIM: data-only, zero bill shock.

Your Karlovy Vary eSIM handles the internet while you travel. Your home number stays exactly where it is — no surprise roaming charges in Karlovy Vary, no swapping your real SIM out.

Keep your number & WhatsApp

The eSIM is data-only and runs alongside your home SIM. Your number, iMessage and WhatsApp keep working exactly as they do at home.

No roaming bills, ever

Turn data roaming OFF on your home SIM and ON for the eSIM. You pay once, up front — no overage, no metered surprises, no bill waiting when you land home.

One thing worth knowing

Because it's data-only, the eSIM can't receive bank verification (OTP) text codes — those still go to your home number. Keep it reachable on Wi-Fi calling, or use app-based codes.

Traveller relaxed and connected on her phone, no roaming bill to worry about

Why travellers choose My Holiday SIM for Karlovy Vary.

Instant eSIM deliveryQR code in your inbox seconds after checkout — even at the departure gate.

No physical SIMNothing to collect, lose or poke out with a paperclip. Your home SIM stays put.

Keep your WhatsApp numberData flows through us; WhatsApp stays on your home number. Family always reaches you.

A traveller at the departure gate, eSIM ready on her phone

eSIM ready in ~2 minutes

No bill shock, everOne clear price before you fly. Roaming charges simply can't happen.

Secure paymentsCards, Apple Pay, Google Pay, PayPal and Klarna — encrypted end to end.

Real human supportReal people — before, during and after your trip. Live chat and email, no bots. Easy top-ups too.

Coverage in Czech Republic.

5G where available, fast 4G everywhere else

Connected · 5G

Your eSIM joins Czech Republic's partner networks automatically — no settings to choose, no manual network hunting. If signal drops in a remote spot, toggling Airplane Mode for a few seconds forces a fresh connection.

O2 Czech Republic
T-Mobile Czech Republic
Vodafone Czech Republic

Popular places covered

PragueBrnoCesky KrumlovKarlovy VaryKutna HoraPlzenOlomouc

Keep data roaming ON for the eSIM line only — that's the switch travel eSIMs use, and it never adds charges on our plans.

Trusted networks, honest numbers.

No invented star ratings behind your Karlovy Vary eSIM — just the numbers we actually stand behind.

Friendly globe with location pins — coverage on every continent

My Holiday SIMSTAY CONNECTED. ANYWHERE.

200+

destinations — every continent covered

regions covered by a single regional eSIM

~2 min

typical install — QR to connected

Live

chat & email support

Before you fly

Karlovy Vary eSIM questions, answered.

Karlovy Vary Airport handles only a few seasonal routes, so most visitors fly into Prague and take a two-hour coach west. Your national Czech eSIM works across the whole trip and throughout the spa town.

Your Karlovy Vary eSIM glossary.

eSIMA SIM built into your phone's hardware. Plans install onto it digitally — no plastic card involved.

QR profileThe code we email you. Scanning it downloads your holiday plan onto the eSIM. One scan per device.

Data roaming (the switch)The toggle travel eSIMs use to join partner networks abroad. On our plans it never adds charges — keep it ON for the eSIM, OFF for your home SIM.

Hotspot / tetheringSharing your phone's data with laptops and tablets. Included on our plans wherever networks allow.

Top-upExtra days added to a live plan from your account. They append to the end — nothing overlaps.

First connectionThe moment your eSIM first joins a network at the destination — that's when your days start counting, not before.

Travelling wider in Czech Republic?