5G Croatia eSIM | Hrvatski Telekom, A1 & Telemach
Roami
Roami is a global eSIM carrier focused on travel connectivity. This guide is compiled from network data, official carrier and manufacturer documentation, and traveler inquiries.
📑 Table of Contents
The right Croatia eSIM is decided on the water, not in Zagreb: this guide ranks the networks the way you will actually use them — ferries, coves and cruise stops. Most country guides rank networks by capital-city speed. Croatia breaks that method, because the product most visitors buy is the coast: a ferry from Split to Hvar, a week in a Korčula cove, or an eight-hour cruise stop in Dubrovnik. None of the Croatia steps below should take more than a few minutes — we clocked first-timers doing each.
Quick answer: Straight to the point: a travel eSIM is the safe default for coverage across Croatia, with the local networks usually cheaper in the larger cities. Speed and price tables for each network follow below — and the compatibility checker settles any handset doubt in about a minute.
The national statistics are solid rather than spectacular. The median mobile download measured 120.15 Mbps, 40th worldwide on Ookla’s Speedtest Global Index for August 2026, with a median 5G download of 193.52 Mbps (36th). Local data is cheap at about USD 1.19 per GB, 111th of 237 markets on Cable.co.uk’s survey, against a USD 2.59 global average.
But a Croatia eSIM is judged on the islands, not in Zagreb: networks are engineered around the ferry corridors, the marinas and the summer surge. This guide maps which carrier holds up where, what visitors pay, and every step to a live data line on deck.
Speed charts and coverage maps are irrelevant if the profile never installs. The handset compatibility checker and this eSIM activation walkthrough cover the fundamentals, leaving this guide free to compare networks head-on.
The short version: The Hrvatski Telekom eSIM is the nationwide anchor — the widest footprint, the strongest island and national-park signal, and the network a ferry itinerary or a cruise stopover should default to. The A1 Hrvatska eSIM is the value play, with a genuinely buyable online tourist line (unlimited 5G from €10.90 for three days, €29 for 30). The Telemach Hrvatska eSIM is the budget data option — around €9.95 for 100 GB bought in a shop — and its network now wins independent speed awards. Test first with free test eSIM, or apply code WEB20 for 20% off a Croatia eSIM plan.
Croatia eSIM coverage: the coast versus the interior
Croatia is a long, thin country with its population pressed against the sea, and networks follow the tourist money: cell density is highest along the ferry corridors linking Split to Hvar, Brač, Korčula and Vis, along the Zadar archipelago, and around Dubrovnik’s old town. It thins rapidly in the karst interior and the Gorski Kotar highlands.
HAKOM, the national regulator, confirms the pattern in its annual regional surveys: excellent performance in county capitals and tourist centres, thinner service between them.
- Carrier choice matters most on the water and between towns, not in them.
- Any Croatia eSIM that can re-select the strongest network — rather than locking to one carrier — turns a coverage gamble into a managed handoff.
One structural fact to settle early: Croatia is an EU and eurozone member, and it has been inside the Schengen area since 1 January 2023. Prices below are in euros — but roam-like-at-home is for EU-resident plans, not for visitors. Croatian operators include small or zero EU roaming data on tourist products, because fair-use allowances are calibrated to the domestic season.
Hrvatski Telekom, A1 and Telemach: how Croatia’s market splits
The market is a three-way oligopoly, all supervised by HAKOM:
- Hrvatski Telekom (HT) — the Deutsche Telekom subsidiary and former incumbent, largest by subscribers, running prepaid through its Simpa brand.
- A1 Hrvatska — the A1 Telekom Austria Group carrier (formerly Vipnet), number two by size and aggressive on tourist pricing.
- Telemach Hrvatska — the United Group challenger that absorbed Tele2 Croatia, historically price-led and now strong on measured speed.
| Hrvatski Telekom | A1 Hrvatska | Telemach Hrvatska | |
|---|---|---|---|
| Tourist eSIM | Sold in HT stores (and Tisak kiosks): unlimited-data editions around €10–13 for 7–10 days | Full online tourist eSIM line-up, €10.90–29.00 plus a 120 GB / 90-day pack at €25 | eSIM issued in Telemach shops; prepaid data around €9.95 for 100 GB |
| Standard prepaid | Simpa bundles from ≈€9.99–18.45 for 5–15 GB (30 days) | Prepaid packs and rechargeable tourist SIMs | Low-cost data bundles, strongest value on big volumes |
| Local number | Included on Simpa and tourist bundles | Included — 100 minutes/SMS within Croatia on tourist plans | Available on voice products |
| Islands and parks | The reference network for Hvar, Korčula, Vis, Plitvice | Good on the mainland coast, patchier on Vis, Lastovo and the far islands | Towns yes, and now award-winning on measured speed |
| Best for | Ferries, cruising, national parks, anywhere-remote | City breaks, split trips, online buyers | Budget mainland stays, big data cheaply |
That structure matters for one Croatia eSIM decision above all others: where you plan to be, not what the plan costs. A1’s €10.90 three-day unlimited eSIM is the cheapest way onto a Croatian network — but if your days are spent between Split and Vis, HT’s store-bought tourist edition is worth the shop visit.
Ookla’s latest Croatia scores, carrier by carrier
All three major measurement programmes have published on Croatia recently, and they do not agree:
| Carrier | Ookla Speedtest Connectivity Score (Q3–Q4 2025) | Ookla median download | Opensignal download (Jul–Sep 2025) | Opensignal upload |
|---|---|---|---|---|
| Telemach Hrvatska | 81.20 — award winner | 138.12 Mbps | 75.7 Mbps | 17.4 Mbps |
| Hrvatski Telekom | 80.73 | not published | 89.0 Mbps | 15.9 Mbps |
| A1 Hrvatska | 74.76 | not published | 59.2 Mbps | 9.6 Mbps |
Ookla’s Speedtest Awards named Telemach both Best Mobile Network and Fastest Mobile Network, with a Speed Score of 69.78 against HT’s 68.83 and A1’s 59.46.
Croatia network awards disagree: which metric picks your eSIM
Opensignal’s October 2025 Croatia report reached a different headline: Telemach took Best Network overall for reliability and availability, while HT recorded the fastest average download at 89.0 Mbps.
HAKOM’s commissioned drive-test campaign, run by Commsquare Hellas across 31 cities and about 5,000 km of roads in 2025, put HT top overall with 904 points of a possible 1,000, ahead of the other two by 53 and 58 points. Its headline speeds, 366 Mbit/s down and 57 Mbit/s up, were the highest single averages recorded.
None of these results is wrong. They measure different things:
- Ookla weights user-initiated speed tests, so it reflects where crowds actually are.
- Opensignal tracks passive experience, so availability and consistency dominate.
- HAKOM drive-tests a fixed national grid in motion, which suits roads and towns equally.
For a visitor the reading is simple: Telemach competes on reliability, HT leads on download speed where tourists gather, and on a ferry itinerary HT’s island reach is unmatched.
Croatia eSIM coverage by coast: Zagreb, Istria, the islands and the south
Treat national medians as the ceiling for any eSIM plan; this table is what you will experience route by route.
| Region | Coverage reality | Strongest carrier | Watch out for |
|---|---|---|---|
| Zagreb and inland Croatia | Full 5G in the capital and major inland towns; motorways A1/A2 well served | A1 Hrvatska or HT | Advent-season crowds slow the city centre cells in December |
| Istria — Pula, Rovinj, Poreč | Dense coverage on the tourist coast, solid inland roads to Motovun and Grožnjan | HT or A1 | Truffle-season October is calm; July weekends are not |
| Kvarner — Rijeka, Opatija, Crikvenica | Continuous 5G along the bay and the Rijeka bypass | A1 Hrvatska | Summer weekend road traffic rivals Split’s port surge |
| Zadar, Šibenik and the Kornati | Strong along the waterfront and highway; the Kornati islands are effectively offline | HT | Sailing beyond the archipelago ferries is a satellite matter |
| Split and the Dalmatian islands | Excellent in Split, on Hvar town, Brač and Korčula; thin on Vis, Šolta’s far side and Lastovo | Hrvatski Telekom | Signal drops minutes after the catamaran leaves the jetty |
| Dubrovnik and the far south | Very good in the old town and along the coast road to Cavtat | HT | Cruise-day congestion is the worst in the country |
| Plitvice and Krka national parks | Towns at the entrances are covered; the trail interiors are not | Hrvatski Telekom | Buy tickets online before you enter — download everything first |
| Slavonia — Osijek, Vukovar | Solid 4G and 5G in the main towns; the A3 motorway is covered end to end | HT or A1 | Villages between Osijek and the Hungarian border sit on LTE |
Beyond Croatia, the same coastline flows into markets a Croatia-only profile does not cover — Slovenia eSIM plans to the north, and two more down the coast:
- Our Italy eSIM guide across the Adriatic
- Montenegro eSIM options at the mouth of the bay
Island and ferry coverage with a Croatia eSIM
Each island sits a different distance from the mainland, so each gives a different answer to “will my Croatia eSIM work here?”
Croatian island coverage: ferried islands and the bridged ones
Two Kvarner islands are reachable by road, which changes your coverage planning: Krk has had a toll-free bridge from the mainland south of Rijeka since 1980, and Pag has been bridged at its southern end since 1968.
| Island | How you reach it | Signal reality | Carrier to favour |
|---|---|---|---|
| Hvar | Catamaran to Hvar Town (about 1 h) or car ferry to Stari Grad (about 2 h) | Strong in Hvar Town, Stari Grad and Jelsa; drops across the Pakleni channel | Hrvatski Telekom |
| Brač | Car ferry Split–Supetar (about 50 min); catamaran to Bol | Good in Supetar, Bol and along the coast road; interior tracks thin | HT or Telemach |
| Korčula | Car ferry Orebić–Dominče (about 15 min) or catamaran from Split | Solid in Korčula Town and Vela Luka; the Pelješac channel is patchy | Hrvatski Telekom |
| Mljet | Car ferry Prapratno–Sobra (about 45 min); catamarans from Dubrovnik | Workable at Sobra and Polače; the national park interior has none | Hrvatski Telekom |
| Vis | Car ferry Split–Vis (about 2 h 20 min) | Good in Vis Town and Komiža; the far west and Stiniva are weak | Hrvatski Telekom |
| Pag | Road bridge from the south, or ferry Prizna–Žigljen (about 15 min) from the north | Reliable along the main road and in Novalja; the bora can suspend the ferry | A1 Hrvatska or HT |
| Krk | Toll-free road bridge; Rijeka’s airport sits on the island | Continuous coverage; the bridge closes to high-sided vehicles in strong bora | A1 Hrvatska or HT |
| Rab | Ferry Stinica–Mišnjak (about 15 min), operated by Rapska plovidba | Good in Rab Town and Lopar; the crossing itself is a gap | HT or Telemach |
| Lošinj | Ferry to Cres first, then the Osor swing bridge; or Valbiska–Merag from Krk | Mali Lošinj and Veli Lošinj are covered; the north of the island is thin | Hrvatski Telekom |
Croatia ferry coverage: crossing times and what happens offshore
Croatia’s ferries come in two flavours, and the distinction decides whether your eSIM works on board. Catamarans carry foot passengers only and stay closer to shore; car ferries are slower, take vehicles and sell out first in summer.
| Route | Crossing | Type | Data on board |
|---|---|---|---|
| Split–Hvar Town | About 1 h | Catamaran | Patchy; usable within sight of land at each end |
| Split–Stari Grad (Hvar) | About 2 h | Car ferry | Best of the Dalmatian crossings; the route hugs the coast |
| Split–Vis | About 2 h 20 min | Car ferry | Long open-water stretch with no signal in the middle third |
| Split–Supetar (Brač) | About 50 min | Car ferry | Reliable for most of the crossing |
| Orebić–Dominče (Korčula) | About 15 min | Car ferry | Continuous — the boats stay in coastal coverage |
| Dubrovnik–Korčula | About 1 h 40 min | Catamaran | Gaps around the Pelješac peninsula |
| Prapratno–Sobra (Mljet) | About 45 min | Car ferry | Mostly covered; the channel takes a short break |
| Prizna–Žigljen (Pag) | About 15 min | Car ferry | Covered, but sailings stop in strong bora |
| Valbiska–Merag (Cres) | About 25 min | Car ferry | Covered for the whole crossing |
| Zadar–Preko (Ugljan) | About 25 min | Car ferry | Continuous |
| Split–Ancona (Italy) | About 11 h | International car ferry | No Croatian cell for most of the crossing; the plan stops at the port |
Book car space two to three weeks ahead in July and August, because vehicle decks sell out before foot-passenger tickets. And note that Hvar’s car ferry lands at Stari Grad, 20 km from Hvar Town — plan the last mile.
Croatia summer congestion: what July and August medians hide
The same cells that produce the national median in October serve multiples of that load in August. Here is the honest shape of the season:
| Month | Load on coastal cells | What to expect | Practical move |
|---|---|---|---|
| April and October | Light | Close to the annual median almost everywhere | The best shoulder months for heavy uploads |
| May | Light | Near-median speeds almost everywhere, including islands | The best-value month for a heavy data user |
| June | Rising | Full speed except in Split port and Dubrovnik on cruise days | Fine for video calls and remote work |
| July | Peak | Terminal and waterfront congestion from mid-morning; island towns slow after 18:00 | Download before you board; use Wi-Fi indoors |
| August | Peak, sustained | The worst month on Hvar’s waterfront and in Dubrovnik’s old town | Shift heavy transfers to early morning |
| September | Falling | Speeds recover through the month as charter traffic thins | Better than August on every measure |
What HT, A1 and Telemach prepaid plans cost
HT funnels all prepaid business through Simpa, sold at T-Centers, Tisak kiosks, post offices and petrol stations for a couple of euros with credit included. Its digital-only eSIMPA bundles, activated in the Moj Telekom app, run roughly €9.99 for 5 GB to €18.45 for 15 GB over 30 days — confirm current listings in the app.
For short-stay visitors, HT stores (and some Tisak kiosks) sell tourist editions with unlimited data for around €10–13 for 7–10 days; in recent seasons a two-for-one promotion doubled the profiles for the same price.
Cheapest data in Croatia, compared
Three habits stop a cheap Croatian price tag from becoming an expensive one:
- Check the validity window, not just the gigabytes. A 15 GB / 30-day bundle and a 15 GB / 7-day bundle are different products at one headline.
- Assume “unlimited” has a fair-use note. Tourist unlimited plans usually run at full speed to a daily quota and throttle after it.
- Separate credit from data. Croatian prepaid accounts hold both, and a topped-up balance is not a data plan.
What are the registration rules in Croatia?
Registration surprises arrivals, and the sources do not agree. Croatian carriers and most retail guides say every prepaid SIM must be registered against a photo ID and an address, with your hotel or apartment accepted. Others, reading the Electronic Communications Act itself, find no such statutory duty and report anonymous prepaid sales. Both can be true in practice: counters ask, and online tourist eSIMs ask for nothing.
A1 Hrvatska and Telemach eSIM offers worth comparing
A1 Hrvatska publishes its full tourist line-up online — the only one of the three with a complete web purchase flow for visitors. Every package below is verified from A1’s own tourist page:
| A1 tourist package | Price | What you get |
|---|---|---|
| 3 Days of Unlimited Data eSIM | €10.90 | Unlimited 5G, 100 minutes/SMS in Croatia, rechargeable |
| 1 + 1 Free, 10 Days Unlimited | €14.90 | Two SIMs (eSIM or physical) with 10 unlimited days, 100 min/SMS |
| 30 Days of Unlimited Data eSIM | €29.00 | A full month of unlimited 5G with in-country minutes |
| 120 GB for 90 Days | €25.00 | Big-data option for long stays, top-up extends another 120 GB |
Order online, receive the profile by email, and the plan starts with your first call or browsing session. Top-ups include a 10-day package for €7.90 and a daily unlimited day for €3. There is no passport check online, which makes A1 the lowest-friction legal route into a Croatian network.
Telemach Hrvatska competes on volume: a data-only prepaid package around €9.95 for 100 GB bought in a shop, plus tourist unlimited-day bundles. The old trade-off — its network being thinnest where the ferry goes — still describes remote islands, but no longer applies to measured national performance.
What does data cost in Croatia?
Side by side, the spread is narrower than the marketing suggests: €10.90 for three unlimited days on A1 (extending at €3 a day), €10–14.90 for a week to ten days of unlimited data, €29 for a full month, and €9.95 for 100 GB with no day limit on Telemach.
Local SIM or travel eSIM: what each costs in Croatia
| Buy from a Croatian carrier | Travel eSIM on Croatian networks | |
|---|---|---|
| Paperwork | Passport at a store (online A1 tourist eSIM excepted) | None |
| Availability before arrival | A1 online; HT and Telemach in person after landing | Anywhere, anytime |
| Real price anchors | €10.90 for 3 unlimited days (A1); ≈€10–13 unlimited week (HT); €9.95 / 100 GB (Telemach) | ≈€4–9 for 5 GB, ≈€14–22 for 10 GB, unlimited-day plans from ≈€2.50/day |
| Local number | Yes on voice bundles | Rarely — most are data-only |
| Network reach | One carrier | Automatic switching across HT, A1 and Telemach |
| Best for | Stays over a week, heavy use, a working Croatian number | One- to two-week trips, cruise stopovers, land-and-connect |
The per-gigabyte economics favour the local Croatia eSIM packs — a €9.95 Telemach 100 GB card is unbeatable on paper — but two of the three carriers sell only in person, and a single-carrier plan cannot borrow HT’s island strength when you sail past it.
Is your phone compatible with Croatian carrier eSIMs?
Three checks decide whether your phone can hold a Croatian profile: supported bands, lock status and an EID. Croatia is straightforwardly European: 4G runs on bands 3, 7 and 20, and 5G has rolled out on the n78 (3.5 GHz) band in Zagreb, Split, Rijeka and Dubrovnik. Any handset sold in Europe works untouched; devices from other regions usually work, but a minority lack band 20 or n78 — the symptom is fast service downtown and LTE on the coast road.
The Croatia eSIM install process
- Lock status. A carrier-locked phone refuses every Croatian profile regardless of what it supports. On iPhone the status sits under Settings → General → About → Carrier Lock; on Android in the SIM manager.
- EID. Dial
*#06#and confirm an EID appears. No EID means no eSIM hardware, and the conversation changes to physical SIMs. - Bands. Only worth chasing if you bought outside Europe and plan to spend time inland.
Skip the band memorization and run your exact model number through eSIM compatibility list instead. It takes two minutes and settles both questions — hardware and lock status included.
Buying a SIM in Croatia: registration and the three routes
Three purchase routes exist. Pick the wrong one and a purchase that should take minutes becomes a July queue.
The in-store route (HT and Telemach)
- Bring your passport — expect to be asked for identification plus an address; a hotel or apartment address is accepted.
- Choose the product: an HT tourist unlimited edition, a Simpa bundle, or Telemach’s 100 GB data card.
- Staff register the SIM, generate the eSIM QR code, and you scan it on the spot.
- Confirm data and a test page load before leaving — staff fix provisioning in minutes that would cost you an email thread later.
- Top up through the Moj Telekom app (HT), the Telemach app, or any Tisak kiosk voucher.
Tisak — the green kiosks at every airport, bus station and main street — sells HT products and is often the fastest counter in a resort town, though eSIM issuing varies by location and season.
The A1 online route, step by step
- Open A1’s tourist offer page and pick a package — €10.90 for three unlimited days is the entry point.
- Pay by card and receive the QR code and instructions by email.
- Install on Wi-Fi before departure; the plan starts at first use in Croatia.
- Set the eSIM as your data line and enable data roaming for it on arrival.
- Extend with the €7.90 ten-day top-up if the trip grows.
The travel eSIM route in Croatia
Buy before you fly, install on Wi-Fi at home, and the profile connects on landing at Zagreb, Split or Dubrovnik — no counter, no registration, automatic carrier selection. For a cruise stopover or a one-week coastal loop this is usually the rational choice, at a modest per-GB premium; our eSIM activation guide covers the install step.
How long does buying a Croatia eSIM take?
- In-store: 15–30 minutes at a quiet counter, an hour or more in Split in August.
- Online with A1: ten minutes at home.
- Travel eSIM: the same, plus automatic network selection.
Ferry corridors and August congestion: Croatian eSIM speeds explained
The August 2026 medians — 120.15 Mbps across all technologies, 193.52 Mbps on 5G — are measured where the users are, which is exactly where the cells struggle. Three mechanics compress real-world speeds in season:
- Terminal surges. Split’s ferry port and Dubrovnik’s cruise terminal concentrate thousands of arrivals into a few hectares of coverage, so expect multi-second page loads between 07:00 and 10:00 and again at afternoon departures.
- Island saturation. Hvar town’s cells serve a July population many times its resident base, and speedtest results on that waterfront in August will not resemble the national median on any network.
- Mid-crossing dead air. Beyond about 10 km offshore, no carrier holds you. Ferries between the larger islands often have usable signal within sight of land on both sides, and that is the honest ceiling of marine connectivity.
Outside those windows, a travel eSIM performs comfortably above what the country’s €1.19-per-GB price suggests: video calls from a Rovinj apartment in June are unremarkable — which is the compliment.
How do you keep signal on Croatia ferries?
- Face the coast. Marina-facing berths and forward decks on catamarans hold a usable edge far longer than an interior seat.
- Pre-download, then switch off. Offline maps, ferry tickets and downloads before boarding beat any on-board workaround.
- Expect the operator name to change. A multi-network profile re-attaches to the strongest coastal cell; that flicker is normal, not a failure.
APN settings for Hrvatski Telekom, A1 Hrvatska and Telemach eSIMs
Manual APN entry is a last resort, not a ritual. Travel eSIM profiles carry their own settings and should never be edited, and one bought at a counter almost always auto-provisions. If a store-bought profile installs but will not pass data, try these values:
| Carrier | APN | Username | Password |
|---|---|---|---|
| Hrvatski Telekom (Simpa) | internet.ht.hr |
blank | blank |
| A1 Hrvatska | data.vip.hr |
blank | blank |
| Telemach Hrvatska | internet.tele2.hr |
blank | blank |
One caveat: A1 Hrvatska descends from Vipnet (hence data.vip.hr, with some device guides listing a plain internet), and Telemach Hrvatska inherited Tele2 Croatia’s naming (internet.tele2.hr). If neither value connects, the profile was probably provisioned incorrectly — a support call, not a settings problem.
Entering Croatian APN values by hand
- iPhone: Settings → Cellular → tap the eSIM line → Cellular Data Network.
- Android: Settings → Connections → Mobile Networks → Access Point Names → new APN.
- Both: save, reboot, then confirm which line is set for data before touching anything else.
Taking a Croatia eSIM across the borders
Croatia sits at the edge of two roaming regimes, and a Croatia-only profile behaves differently depending on which way you drive. Schengen means no border checks toward Slovenia and Hungary; it does not mean your data plan follows you.
Croatia eSIM abroad: what works
| Destination | Roaming regime | What happens to your Croatia eSIM | What to buy instead |
|---|---|---|---|
| Slovenia | EU, inside roam-like-at-home | Croatian tourist products include little or no EU data, so assume it stops | A Slovenia plan or a regional Europe profile |
| Hungary | EU, inside roam-like-at-home | Same position as Slovenia: check the plan’s fair-use allowance first | A regional Europe profile |
| Bosnia and Herzegovina | Outside the EU regime | No service on a Croatia-only plan | A dedicated profile; note the Neum corridor below |
| Montenegro | Outside the EU regime | No service; coverage along the coast is good once you have a plan | Montenegro eSIM options |
| Serbia | Outside the EU regime | No service | A Balkans or regional profile |
| Italy, by sea | EU | No service on a Croatia-only plan, despite the short crossing | A dedicated profile for Italy |
There is a nuance in the Western Balkans: since October 2023, EU and Western Balkans operators have run a voluntary roaming declaration capping retail data prices between the two regions — €18 per gigabyte from 2023, €14 from 2026 and €9 from 2028 — while roaming inside the Western Balkans has been like-at-home since July 2021. That softens a Balkan leg on some plans, but it does not turn a Croatian tourist product into a regional one.
The Neum corridor and Pelješac Bridge: roaming on the Dubrovnik drive
The old coastal road between Split and Dubrovnik left Croatia for about 9 km at Neum, crossing Bosnia and Herzegovina twice. Since the Pelješac Bridge opened in July 2022 — 2,404 m long, and free to use — most traffic bypasses Bosnia entirely. Drive the bridge and your Croatia eSIM keeps working, because you never leave Croatian networks; take the old Neum road for cheap coffee, and expect no service until you cross back.
How to activate your Croatia eSIM
Install mechanics — scan, label, set as data line, enable roaming — are universal and covered in our eSIM setup guide. The failure patterns below are the ones Croatian geography actually produces.
A. The QR code scans but the profile will not download. Do it on Wi-Fi, not on marina or airport hotspots. A profile that half-downloads on a flaky connection is the most common self-inflicted fault; retry on a stable network, or use the manual SM-DP+ code from your confirmation email.
B. Installed, but the phone shows no operator. Set network selection to manual and choose Hrvatski Telekom, A1 HR or Telemach by name — a fresh profile sometimes needs a nudge to attach, especially in Split’s port where three carriers broadcast at once.
C. Full bars, no data. Confirm data roaming is ON for the eSIM line, verify the APN table above, and check your allowance — tourist unlimited plans may drop to a reduced speed after a daily full-speed quota.
D. Works on land, dies mid-channel. Nothing to fix — you are out of range of every Croatian cell. Download tickets, maps and tomorrow’s timetable before boarding.
Beyond these, the general catalogue of install and registration errors lives in activation error troubleshooting guide.
An eight-hour cruise stopover, hour by hour
A cruise day is the hardest connectivity problem in Croatia: you land in the country’s most congested cell with the least time to solve anything.
Your cruise day, planned around the congestion curve
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The night before: confirm the eSIM is installed, enabled and set as the data line, with roaming on for it and off for your home SIM.
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07:00–07:30, at anchor: download an offline map and screenshot your return-to-ship details while the ship’s Wi-Fi still wins.
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08:00, ashore: walk two or three streets inland before your first heavy upload. Terminal cells are the worst in the city.
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09:00–12:00: use the eSIM for maps, tickets and translation, and buy any physical tickets online rather than queueing.
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12:00–15:00: this is the congestion peak, so treat it as a browsing window, not a streaming one.
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15:00–16:00: step back toward the terminal and let the profile re-attach; heavy transfers usually complete before the crowds return.
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Before boarding: download the next port’s map and tickets, so tomorrow’s stop starts with data already in hand.
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On board: expect the ship’s Wi-Fi to be the slower option at sea, and the eSIM to be dead once the vessel clears the coast.
Why ferry terminals have the worst signal in Croatia
Two hectares of quay can hold five thousand people and a thousand phones. The cells covering Dubrovnik’s Gruž terminal and Split’s ferry port are engineered for a resident population, not for a fleet. Nothing in your settings changes that; positioning does — a few streets inland, or the shoulder hours.
The Croatia FAQ: islands, ferries and eSIM basics
Which network wins on Hvar, Brač and Vis?
Yes — HT is the strongest network on all three islands, with solid 4G in the main towns and harbours. Interior tracks on Brač and the far side of Vis are thinner, and speed drops under July–August loads. For an island-heavy itinerary, HT is the default.
Local SIM vs eSIM for tourists in Croatia
The only Croatia eSIM you can buy from abroad comes from A1 Hrvatska’s online tourist offer or from international travel eSIM providers; Hrvatski Telekom and Telemach issue visitor eSIMs in shops after you land. If you are arriving late, pre-purchase online; otherwise a Tisak kiosk at the airport solves it in fifteen minutes.
Why does Dubrovnik’s old town slow to a crawl?
Congestion, not your plan. Cruise-ship days push the old town’s cells far past their design load, and every carrier slows together. Connect before 08:00 or after 19:00, or step a few streets back from Stradun — the network recovers as the crowds thin.
What documents does a Croatia SIM purchase require?
Carriers and most retail guides say yes: registration against a valid photo ID plus an address, with hotel and apartment addresses accepted. Other sources reading the Electronic Communications Act find no such duty and report anonymous prepaid sales. Either way, bring your passport — an online tourist eSIM requires no identification at all.
Will a Croatia eSIM work in Bosnia and Herzegovina, Montenegro or Slovenia?
Not by default. Croatian tourist products include little or no EU roaming data, and Bosnia, Montenegro and the rest of the western Balkans sit outside the EU-roaming regime entirely. Slovenia, as an EU member, may be covered by a small allowance on some plans — but nothing here covers a Croatia-only profile.
Who provides mobile service in Croatia?
Whichever profile holds the strongest signal at the terminal — on those two ports that is usually Hrvatski Telekom, though Telemach now wins on measured reliability nationally. For a six-to-eight-hour stop, a travel eSIM activated the night before beats buying on shore: no registration desk, no queue, and data live before the gangway is down.
How much does unlimited data cost for 10 days in Croatia?
An unlimited Croatia eSIM runs €10–15 for a week to ten days: A1’s 1+1 offer lists 10 unlimited 5G days at €14.90, HT’s store editions have run around €10–13, and Telemach’s 10-day edition near €14.90.
Can you tether a laptop on Croatian eSIMs?
Yes — tethering is allowed on all three carriers’ tourist and prepaid products, since Croatian operators do not block it on prepaid data. Watch the allowance rather than the permission: unlimited plans run at full speed to a daily quota and throttle after, so a laptop pulling video all afternoon meets that ceiling sooner than a phone.
Where is 5G strongest in Croatia?
Yes. All three carriers have deployed 5G on the n78 band across the larger coastal cities — Split, Rijeka, Zadar, Dubrovnik — and the national 5G median of 193.52 Mbps reflects that rollout. On a small island or a rural inland district your eSIM will sit on 4G instead, which at Croatian LTE speeds is rarely a problem.
What happens to a Croatia eSIM when the ferry leaves port?
A Croatia eSIM loses signal around 10 km offshore, when the vessel passes out of every carrier’s footprint, and reconnects as land comes back into range — nothing breaks and nothing needs resetting. Keep airplane mode off and pre-download whatever you need for the crossing.
The measurements behind our Croatia carrier tables
- Ookla Speedtest Global Index — the Croatia country page reports the August 2026 medians: 120.15 Mbps mobile and 193.52 Mbps on 5G, plus world ranks.
- Ookla Speedtest Awards — the Croatia 2025 award page lists the per-carrier Speedtest Connectivity Scores and Telemach’s 138.12 Mbps median download.
- Opensignal — the Croatia Mobile Network Experience Report, October 2025 measured the per-carrier download and upload figures and availability at 98.9%.
- HAKOM — the regulator’s 2025 independent measurement results, run by Commsquare Hellas across 31 cities and about 5,000 km of roads, produced the drive-test speeds.
- A1 Hrvatska — the official tourist offer page verifies every A1 package price listed.
National price comparisons come from Cable.co.uk’s worldwide data pricing study, which puts Croatia’s average at USD 1.19 per gigabyte, and market-size context from DataReportal’s Digital 2025: Croatia. Ferry crossings and bridge dates follow Jadrolinija’s published timetables. All figures are dated third-party measurements or operator-published prices, not performance guarantees.
Get your Croatia eSIM ready before you fly
The Adriatic rewards travellers who solve connectivity before the gangway: timetables downloaded, tickets in the wallet, and a data line that follows the coast. Roami’s Croatia eSIM switches automatically across Hrvatski Telekom, A1 Hrvatska and Telemach — island to island, port to port. Grab a zero-cost trial eSIM to test it; apply code WEB20 for 20% off your first plan.
One final check before departure: your phone, on the eSIM compatibility page, then claim a test eSIM and watch how eSIM compatibility treats your route. If that works, code WEB20 takes 20% off any paid Roami plan for Croatia.
