Best eSIM for Greece 2025
Cosmote vs Vodafone Greece, Santorini and island coverage, ferry signal reality, EU roaming rules for non-EU visitors, and how much data to pack for an island-hopping trip.
Networks
Cosmote · Vodafone · Nova
Best network
Cosmote — widest island reach
EU roaming
Applies for EU citizens only
Non-EU visitors
US, UK, AU — use travel eSIM
EU roaming in Greece — who it helps and who it doesn't
Greece is an EU member state, so EU "Roam Like at Home" applies — but only for visitors who already have an EU carrier. If you're from Germany, France, Italy, or another EU country, your home data allowance works in Greece at no extra cost.
US, UK, Canadian, and Australian visitors: EU roaming doesn't apply to you
If you're from a non-EU country, your home carrier charges international roaming rates in Greece — typically $10–20 per day for a day pass, or several dollars per MB. UK carriers lost EU roaming rights after Brexit. A Greece travel eSIM covering the full trip is significantly cheaper and more convenient than daily carrier roaming passes.
Cosmote vs Vodafone Greece vs Nova
| Network | Strengths | Best for |
|---|---|---|
| Cosmote | Greece's largest network (Deutsche Telekom subsidiary); widest mainland and island coverage; reaches many smaller Aegean and Ionian islands; most commonly used by international eSIM providers | All of Greece — mainland, popular and remote islands, island-hopping |
| Vodafone Greece | Strong in Athens, Thessaloniki, Crete, and major tourist islands (Santorini, Mykonos, Rhodes, Corfu); competitive data speeds; second choice for most tourists | City trips and popular island destinations |
| Nova (formerly Wind) | Solid urban coverage; reasonable prices for local SIMs; good in Athens and Thessaloniki | Urban alternative; less commonly used by international eSIM providers |
Coverage by destination
Athens
Excellent 4G city-wide. Acropolis and surrounding Plaka district: full coverage. Metro system: coverage on most lines but drops in tunnels. Piraeus port: good. Athens Riviera (Glyfada, Vouliagmeni): excellent.
Santorini
Very good 4G across the island. Oia (famous blue domes, caldera view): covered. Fira and Firostefani: covered. Black sand beaches (Perissa, Perivolos): covered. The caldera rim path: good signal. One of the best-covered Greek islands.
Mykonos
Good 4G across the island. Mykonos Town (Chora), beach clubs (Paradise, Super Paradise), windmills area: all covered. The island is small enough that coverage is consistent.
Crete
Excellent coverage in Heraklion, Chania, Rethymno, and Agios Nikolaos. The north coast highway (E75) is well-covered. Samaria Gorge: signal at the top entry (Omalos) and the bottom (Agia Roumeli), no signal in the gorge itself. Remote Sfakia region: patchier.
Rhodes
Good 4G in Rhodes Town (UNESCO old city), Lindos, and the main tourist strip. The west coast beach resorts: covered. Remote inland villages: variable.
Corfu
Good coverage in Corfu Town and the main beach resorts. The interior and northwest (Paleokastritsa area): coverage present but can be slower. Albanian coast visible from the north — Greek networks still provide signal here.
Smaller Aegean islands (Ikaria, Folegandros, Tilos)
Coverage exists in main ports and villages but is primarily 3G or weak 4G. Some very remote islands (uninhabited or tiny) have no coverage at all. Check Cosmote's coverage map for your specific island before relying on mobile data.
Ferries
Short routes (Piraeus → Aegina 35min, Athens → Hydra): signal throughout. Long routes (Piraeus → Santorini 5–8h by fast ferry, Piraeus → Rhodes 12h): signal near ports, open water sections lose signal. Download offline maps and entertainment before boarding overnight ferries.
How much data do you need in Greece?
| Trip type | Recommended data |
|---|---|
| 1-week Athens city trip | 5–8 GB |
| 1-week single island (Santorini, Crete) | 5–8 GB |
| 2-week island-hopping (3–4 islands) | 10–15 GB |
| Athens + Peloponnese road trip | 8–12 GB |
| Remote work / digital nomad | 30–50 GB per month |
Ferry and island-hopping data tip
Load up with a larger plan (15+ GB) if you're island-hopping — ferries are the perfect time to download maps for the next island, but you won't have Wi-Fi. On smaller islands, mobile data is your primary connection since Wi-Fi at remote beaches and hiking spots is nonexistent.
Frequently asked questions
Does eSIM work in Greece?
Yes. Cosmote, Vodafone Greece, and Nova all support eSIM. Excellent 4G in Athens, Santorini, Mykonos, Crete, and most popular islands. Smaller remote Aegean islands can be patchier — some have only 3G.
Does EU roaming apply in Greece?
For EU citizens: yes, Roam Like at Home applies. For US, UK, Canadian, and Australian visitors: no. You pay international roaming rates. A Greece travel eSIM is much cheaper than paying daily roaming passes.
Cosmote vs Vodafone Greece — which should I choose?
Cosmote has the widest island coverage, especially for smaller islands and remote Aegean destinations. Vodafone Greece is strong on popular tourist islands and in cities. For island-hopping beyond the main Cyclades, Cosmote is the safer choice.
Will I have signal on Greek island ferries?
Short ferries: usually yes. Long routes (Piraeus to Santorini, Rhodes, etc.): signal near ports, patchy or none in open sea. Download offline maps before boarding.
Is there coverage in Santorini?
Yes — Santorini has good 4G island-wide including Oia, Fira, and the beaches. It's one of Greece's most tourist-dense and well-covered islands. No special coverage worries for Santorini.