Greece is the ultimate island-hopping destination, and that means relying on your phone more than you might expect: ferry tickets and schedule changes, rental car and ATV bookings, maps to hidden beaches and restaurant reservations in Oia or Mykonos Town. Roaming on a non-EU plan can get expensive over a multi-week trip, and island Wi-Fi is often unreliable.
A Greece eSIM gives you fixed-price data from the moment you land in Athens, Thessaloniki, Heraklion or Santorini. Install it before you fly, switch it on at arrival and keep your home number active on your physical SIM. Simhop compares current Greece eSIM plans below by data, validity and price.
Networks and coverage on the mainland and islands
Greece has three mobile operators: Cosmote, Vodafone GR and Nova. Cosmote has the strongest coverage overall, especially on smaller islands and in mountainous areas. Vodafone and Nova are reliable in Athens, Thessaloniki and on the popular islands such as Crete, Rhodes, Corfu, Santorini and Mykonos.
4G is standard across most of the country, and 5G is available in Athens and other cities. Coverage can be patchy on remote islands, in mountain villages on the Peloponnese and in secluded coves you reach only by boat.
How much data do you need for island hopping?
A week on one island with a good hotel Wi-Fi connection needs about 3 to 5 GB. Island hopping is different: you will check ferry apps, maps, booking sites and messages constantly, and accommodation Wi-Fi varies a lot. Plan on 10 GB or more for a two-week trip across several islands. Our guide How much data do I need? helps you estimate.
Taking a day trip from Kos or Rhodes to Bodrum or Marmaris? Turkey is not in the EU and is not covered by Greece plans, so add a Turkey eSIM for that day.
Travel tips: ferries and maritime roaming
On ferries and cruise ships, phones sometimes connect to an onboard maritime network. These satellite connections can be extremely expensive and are usually not covered by travel eSIMs or by your home plan's roaming. Turn off data roaming on your home SIM before boarding and keep an eye on which network your phone joins at sea.
- Check eSIM compatibility (eSIM-compatible phones list).
- Install the eSIM at home on Wi-Fi and switch it on when you land.
- Save ferry tickets and boarding passes offline in case signal drops at the port.
Setup guides: iPhone and Android.
FAQ: eSIM for Greece
Do I need an eSIM in Greece?
If you are traveling from outside the EU, an eSIM is usually much cheaper than international roaming. It also gives you reliable data on islands where Wi-Fi is weak.
Which network is best on the Greek islands?
Cosmote generally has the best coverage on the islands, including smaller ones in the Cyclades and Dodecanese. Vodafone and Nova also work well on the larger, more popular islands.
Will I have internet on Greek ferries?
Near the coast your eSIM often keeps a signal, but in open water coverage drops. Some ships connect phones to expensive maritime networks, so turn off roaming on your home SIM before boarding.
Does a Greece eSIM work in Turkey?
No. Turkey is a separate, non-EU country. If you plan a day trip from Kos, Rhodes or Samos to the Turkish coast, buy a separate Turkey eSIM or a regional plan that includes Turkey.
When should I activate my Greece eSIM?
Install it at home on Wi-Fi a day or two before you leave and turn it on when you land. With most providers, the validity starts when the eSIM first connects to a Greek network.
