eSIM for Greece: island hopping, ferries and how much data you need
What a travel eSIM for Greece costs, where coverage is strong and where it isn't, and the one ferry setting that saves you from a roaming bill.
· 8 min read
An eSIM for Greece is a data plan you install on your iPhone before you fly, so you land in Athens or on an island already online, with your usual number still working for calls and texts. Greek coverage is good in cities, on the mainland's main roads and in the towns of the bigger islands; the gaps are mountain interiors, remote beaches and open sea. With Cabin Mode, most travellers need 5–10 GB for one to two weeks, which costs a few dollars.
The part of a Greek trip that catches people out isn't the eSIM. It's the ferry.
What a Greece eSIM costs
These are the Greece-only plans in the catalog at 1 GB and above.
| Data | Valid for | Price (USD) | Per GB |
|---|---|---|---|
| 1 GB | 7 days | $1.14 | $1.14 |
| 3 GB | 15 days | $3.00 | $1.00 |
| 3 GB | 30 days | $3.20 | $1.07 |
| 5 GB | 30 days | $4.76 | $0.95 |
| 10 GB | 30 days | $8.56 | $0.86 |
| 20 GB | 30 days | $18.92 | $0.95 |
| 50 GB | 30 days | $42.00 | $0.84 |
| 50 GB | 180 days | $44.00 | $0.88 |
Prices checked 25 September 2026; the app shows current prices in your currency.
The sweet spot for most trips is 10 GB for 30 days. It covers a two-week island trip with room for photo uploads, and the validity is long enough that you don't have to worry about the date you land. There are also one-day passes if you're only passing through Athens on the way somewhere else. See all current Greece plans. Other countries on the same trip are on the destinations page.
Most Greece plans start counting down on the first network connection in Greece, not when you install them, so installing a week early costs you nothing. The exception is a tiny 100 MB plan that starts on install; the plan screen says which rule applies before you pay.
How much data for Greece
Greek trips tend to split into two kinds of days: busy days in Athens or Thessaloniki, where you navigate, book and look things up constantly, and slow island days where the phone mostly sits in a beach bag. That averages lower than a city break elsewhere.
- One week, mostly islands: 3–5 GB
- Two weeks, Athens plus two or three islands: 5–10 GB
- Road trip on the mainland or Crete: add 1–2 GB for navigation and podcasts in the car
- Working remotely or hotspotting a laptop: 20 GB or more
Video is the big variable. An hour of Instagram Reels or TikTok can use 1 GB on its own; an hour of maps uses a few MB. Our general guide on how much data you need for a trip has the per-app numbers.
If you run low, top up in the app. The extra data goes onto the same eSIM, so there's nothing to reinstall mid-trip on a ferry deck.
Coverage: where it's strong and where it thins
As of 2026, Greece has three mobile networks: Cosmote, Vodafone and Nova. All three cover Athens, Thessaloniki and the main tourist towns well, and 5G is available in the larger cities.
Strong:
- Athens, Piraeus and Thessaloniki
- The main towns and ports of the popular islands: Santorini, Mykonos, Naxos, Paros, Corfu, Rhodes town, Chania and Heraklion
- The national motorways and main coastal roads
Patchier:
- Mountain interiors: the White Mountains and Samaria Gorge on Crete, the Pindus, parts of the Peloponnese
- Remote beaches reached by dirt road or boat, especially on the smaller Cyclades
- Monasteries and villages in steep valleys, such as around Meteora and the Mani
- Open sea between islands
None of this is unusual for a mountainous country with 200 inhabited islands. The practical answer is to download offline maps (Google Maps and Apple Maps both do it) for any island or region you'll drive around, and to save ferry tickets and hotel confirmations to your phone rather than relying on an email you'll open later.
Ferries: the setting that matters
This is the single most useful thing in this post.
When a ferry is out of range of shore masts, some ships switch on a maritime mobile network that connects via satellite. If your phone is set to roam, it may connect to it automatically. These networks sit outside ordinary roaming bundles, including the EU's roam-like-at-home rules, and as of 2026 consumer groups warn they can cost around €7–10 per MB. A phone quietly syncing photos in the background can run up a painful bill in one crossing.
A second version of the same problem: the eastern Aegean islands (Lesvos, Chios, Samos, Kos and Rhodes) sit a few kilometres from the Turkish coast. Phones there, and on ferries between them, sometimes connect to Turkish networks. Turkey isn't in the EU roaming zone, so a home plan that includes Greece may not include Turkey.
A travel eSIM protects you only if it's the line doing the roaming. What actually happens is that people install an eSIM, then leave data roaming on for their home line too. So:
- In Settings → Mobile Data (or Cellular), set Mobile Data to your travel eSIM.
- Tap your home line and turn Data Roaming off. Calls and texts to your normal number still come through.
- On a long crossing, the cautious move is airplane mode with Wi-Fi turned back on, using the ship's Wi-Fi if there is any.
Your Greece plan only covers Greece. If your phone drifts onto a Turkish network near Kos or Rhodes, the Greece eSIM simply won't have data there until you're back in range of a Greek mast.
Island hopping, the Balkans and Turkey
If Greece is the whole trip, a Greece plan is the cheapest option by a wide margin. If it's one stop of several, compare regional plans:
- Greece and a day trip to Turkey (Bodrum from Kos, Kuşadası from Samos, Çeşme from Chios): the "Europe(30+ areas)" plan covers both Greece and Turkey. 10 GB for 30 days was $19.80 on 25 September 2026. The simpler option is often a Greece plan plus a small Turkey plan; see our Turkey eSIM guide.
- Greece plus Albania, North Macedonia or Bulgaria: the "Balkans (5+ areas)" plan covers Greece, Albania, Bulgaria, Croatia, Montenegro, North Macedonia and Serbia. It's convenient but priced higher per GB ($43.00 for 10 GB when checked).
- Greece as part of a longer Europe trip: a Europe plan is the answer. Best eSIM for Europe explains which regional plan covers what; Europe plans are here.
Two single-country eSIMs are fine, too. An iPhone can hold several eSIMs; you just pick which one is used for data.
Do you need a Greek phone number?
Almost never. Greek hotels, rental agencies and tour operators are used to foreign numbers and routinely message over WhatsApp or email. Ferry operators and booking sites send tickets by email.
A travel eSIM is data only. It doesn't come with a Greek number, and you can't make ordinary calls or send SMS on it. Your normal SIM stays in the phone for that, and iMessage, FaceTime and WhatsApp keep using your usual number over the eSIM's data. If you want to avoid paying your home carrier for incoming calls, leave the home line on but with roaming off; texts usually still arrive, and calls over Wi-Fi Calling may work depending on your carrier.
Arriving in Athens
Install the eSIM at home on Wi-Fi, the day before you fly or earlier. Installation needs an internet connection, and Athens airport Wi-Fi is not where you want to be doing it with a queue behind you at passport control. The steps are in how to install an eSIM on iPhone.
When the plane lands, turn off airplane mode. The eSIM connects to a Greek network and the plan starts counting down. If data doesn't appear within a minute or two, check that Data Roaming is on for the eSIM line (it has to be, since the eSIM is technically roaming on a Greek network).
From there you can book the X95 bus or metro into the centre, order a taxi through an app, or check your ferry from Piraeus or Rafina before you've left the terminal.
Hotspotting
You can share the eSIM's data through Personal Hotspot on your iPhone, so one person's eSIM can keep a partner's phone or a laptop online for a day of island driving. Hotspotting uses data fast, mostly because laptops download updates and sync cloud folders in the background. If you plan to hotspot regularly, pick 20 GB rather than 10 GB and set the laptop's connection to low data mode.
Checking your usage
Usage in the app lags the network by one to three hours. If you're near the end of your allowance on a travel day, top up before the ferry rather than after, because the figure you see may already be behind.
Frequently asked questions
Do I need a SIM card for Greece?
No. If your iPhone is an XR or later and carrier-unlocked, a travel eSIM gives you data without a physical SIM card. Your normal SIM stays in place for calls and texts.
Does an eSIM work on the Greek islands?
Yes. Coverage is good in the towns and ports of all the popular islands, including Santorini, Mykonos, Crete, Corfu and Rhodes. Expect gaps on remote beaches, mountain roads and out at sea between islands.
How much data do I need for 2 weeks in Greece?
Most travellers use 5–10 GB over two weeks. Choose 10 GB if you post videos, use maps heavily on a road trip, or share your connection through a hotspot.
Will I be charged roaming on a Greek ferry?
You can be, if your home line is roaming. Some ferries use satellite maritime networks that charge very high rates. Set your travel eSIM as the data line and turn Data Roaming off on your home line before boarding.
Does a Greece eSIM work in Turkey?
No, a Greece-only plan covers Greece. For a day trip to Turkey from Kos, Samos or Rhodes, add a Turkey plan or choose a regional Europe plan that lists both countries.
Is 5G available in Greece?
Yes, as of 2026 all three Greek networks offer 5G in the main cities. Outside them you'll mostly be on 4G, which is plenty for maps, messaging and social media.