Updated · 5 min read
Greece means island hopping: ferry tickets, port times, rooms booked on the go and maps on winding island roads. Mobile data matters, and Greece has a roaming trap that surprises many visitors every summer.
Do you need an eSIM for Greece?
On a SIM from an EU country, Iceland, Liechtenstein or Norway, EU roaming rules apply in Greece and you can usually use your home allowance, within your operator's fair-use limits. On a SIM from the UK, Switzerland, the USA, Canada, Turkey, Australia and most other countries, Greece is usually billed as roaming. A travel eSIM gives you a fixed pack instead.
Mobile networks in Greece
Greece has three mobile networks: Cosmote (Cosmote Telekom), Vodafone and Nova (formerly Wind). In January 2026 Vodafone reported 5G coverage for more than 95% of the population. On remote islands and in the mountains, coverage can still be patchy. The plan details on our Greece page show the partner networks.
The Turkish and Albanian network trap
Kos, Rhodes, Samos, Lesbos and other east Aegean islands lie within sight of the Turkish coast, and Corfu is close to Albania. Phones on automatic network selection often join a Turkish or Albanian network because its signal is stronger. Neither country is part of EU roaming, so travellers have been charged expensive roaming even though they never left Greece.
- Turn off automatic network selection and choose a Greek network manually.
- Watch for “Welcome to Turkey” or “Welcome to Albania” text messages from your home operator.
- Keep data roaming off for your home SIM when you use a travel eSIM.
Ferries
Near the islands, phones usually stay on Greek networks. On the open sea, ships can use on-board or satellite networks, which are not covered by EU roaming and can be very expensive. Use airplane mode and on-board Wi-Fi on longer crossings.
How much data do I need?
A one-week island holiday with maps, messaging and social media usually needs 3–5 GB. For two weeks of island hopping, lots of photos and video or a hotspot, plan 10–20 GB.
Download offline maps of each island and save ferry tickets in your wallet or as PDF before you board.
Frequently asked questions
Why does my phone say I am in Turkey on Kos or Rhodes?
Turkish networks reach the east Aegean islands, and phones on automatic network selection can join them. Choose a Greek network manually to avoid non-EU roaming charges.
Does the eSIM work on Greek ferries?
Near the coast it can connect to Greek networks. On open sea, ships often use on-board networks that are not covered. Use airplane mode and on-board Wi-Fi there.
Which networks are there in Greece?
Cosmote, Vodafone and Nova. The plan details show which partner networks a pack uses.
Can I use a hotspot in Greece?
Most partner networks allow hotspot use, but it uses data quickly. Check the plan details and choose a larger pack if you tether a laptop.
When does the validity start?
Usually with the first connection to a network in Greece. Install the eSIM at home and switch it on after landing.