Greece has strong coverage on the mainland and on almost every inhabited island, and travel data is cheap. But island hopping comes with two catches: signal drops on ferries in open water, and on islands close to Turkey — Kos, Rhodes, Samos, Lesvos, Chios — phones can connect to Turkish networks, which are outside the EU.
Short answer: a Greece plan with 5–10GB and validity covering your whole trip suits most island hoppers. If you are staying on the eastern Aegean islands or taking a day trip to Bodrum or Kuşadası, check that your plan covers Turkey, or keep your phone on a Greek network.
What a Greece eSIM costs
At the time of writing (October 2026), Wanderly's Greece plans start at $2.99 for 1GB, with 10GB for 30 days around $8. The median across data-only Greece plans is about $0.80 per GB — well under the $1.43 median across 187 countries in the Wanderly eSIM Price Index.
Some of the cheapest per-GB bundles last only three to five days. For an island-hopping fortnight, choose 30-day validity. Comparing providers? See Greece vs Airalo and Greece vs Holafly.
The Turkish-coast trap
The Dodecanese and North Aegean islands sit a few kilometres from the Turkish coast. On Kos, Rhodes, Symi, Samos, Lesvos and Chios, phones sometimes pick up a Turkish network that is stronger than the Greek one.
- On an EU home plan, that can trigger non-EU roaming charges.
- On a Greece-only eSIM, it can mean no data until you reconnect to a Greek network.
To avoid it: set your network selection to manual and choose a Greek network, or use a plan that lists Turkey. Turkey has the cheapest data in our index — see the best eSIM for Turkey if you are crossing over.
Networks and coverage
Greece's networks are Cosmote, Vodafone and Nova. Travel eSIMs connect to a partner network automatically.
- Athens and Thessaloniki: strong 4G and widespread 5G, including the Athens Metro.
- Cyclades (Santorini, Mykonos, Naxos, Paros, Milos): good in towns and most beaches.
- Crete: good in Heraklion, Chania and Rethymno; weaker in the White Mountains and Samaria Gorge.
- Ionian (Corfu, Zakynthos, Kefalonia): good in towns.
- Meteora and Delphi: good coverage.
- Ferries: coverage near ports and islands; drops in open water.
How much data you need
| Trip | Suggested data |
|---|---|
| Athens long weekend | 1–3 GB |
| One week, two islands | 5 GB |
| Two weeks island hopping | 10 GB |
| Remote work | 20 GB+ |
Ferry apps, maps and messaging are light. See how much data you need for travel.
Greece on a wider trip
Combining Greece with Italy or Croatia? See the best eSIM for Italy, the best eSIM for Croatia and the best eSIM for Europe.
Setting it up
- 1Confirm your phone supports eSIM and is unlocked on our compatibility checker.
- 2Install the eSIM over WiFi before you fly — iPhone or Android steps.
- 3On landing, select the eSIM for mobile data and turn on data roaming for that line.
- 4Turn off data roaming on your home line.
FAQ
Why did my phone connect to a Turkish network in Greece? On islands close to Turkey, Turkish signals can be stronger. Choose a Greek network manually, or use a plan that covers Turkey.
How much does an eSIM for Greece cost? Wanderly Greece plans start at $2.99 for 1GB, with a median of about $0.80 per GB.
Is there coverage on Greek ferries? Near ports and islands, yes. In open water, signal often drops.
Does an eSIM work in Santorini and Mykonos? Yes, coverage is good in towns and at most beaches.
Does my EU plan work in Greece? Yes, under EU roaming rules — but watch for Turkish networks on the eastern islands.
Adding Cyprus? Northern Cyprus uses networks outside EU roaming — see the best eSIM for Cyprus.