Best eSIM for Greece

Island-hopping in Greece is run from a phone. Ferries between Piraeus, Santorini, Mykonos, Naxos and Paros are booked on Ferryhopper or the operators' apps, schedules shift with the wind, and Santorini's port is a long taxi queue from the caldera towns unless you have already messaged for a transfer. In Athens you will lean on Google Maps and on Uber, which here summons a licensed taxi, plus timed tickets for the Acropolis. Greek prepaid SIMs from Cosmote, Vodafone and Nova are sold at Athens (ATH) airport and in kiosks, but the SIM must be registered against your passport, and island shops keep short hours outside high season. A data eSIM installed at home connects when you land at Athens, Thessaloniki (SKG), Heraklion (HER), Rhodes (RHO) or Santorini (JTR), works across the islands on the same national networks, and keeps your home number in the other SIM slot for calls and one-time passwords. Roaming packs charge by the day, and a ten-day island loop adds up fast.

Most Greek itineraries run seven to fourteen days and mix a couple of Athens nights with two or three islands, so buy for the whole stay rather than topping up from a beach. Data use is medium to heavy: ferry bookings, navigation on unmarked island roads, restaurant lookups, and a great many sunset photos and videos heading to the cloud from Oia. Streaming during a five-hour crossing is the habit that drains a small plan, so download beforehand or choose a bigger allowance.

Cosmote, Vodafone and Nova all run 5G in Athens, Thessaloniki and the larger islands, so a 5G handset will see it often; on smaller islands and in the mountains you will be on 4G, which is still ample for maps and messaging. You do not need a Greek number. Uber and FreeNow book taxis on your existing account, hotels and boat operators run on WhatsApp, and Ferryhopper accepts a foreign card.

Many people pair Greece with Türkiye, which sits outside the EU, or arrive by ferry from Italy. For a route like that the Europe bundle covers several countries on one eSIM; check its plan card for the exact list, since Türkiye is not in every regional plan. On a cruise the eSIM works in port or close to shore, not at sea. Hotspot works on most plans. Check your phone at the device checker first.

Greece has three mobile networks: Cosmote, Vodafone and Nova, the operator formerly branded Wind. Your eSIM uses the partner network on the plan card and picks the strongest 4G or 5G signal available. Athens, Thessaloniki, Patras and Heraklion have 5G, as do the busy parts of Santorini, Mykonos, Rhodes, Corfu and Crete's north coast; nearly every inhabited island has 4G in its port and main villages. Where it thins is predictable: the open sea between islands, where the signal fades a short way out of port and returns as you approach the next one; the Samaria Gorge and other Cretan gorges; the Pindus mountains and the Zagori villages; the Mani peninsula's remote beaches; and the far ends of small islands such as Milos and Folegandros. Meteora's monasteries are covered from the valley floor. In Athens, expect slower speeds on the Acropolis at midday and in the Plaka lanes on summer evenings, when thousands of visitors share the same cells.

• Athens — 5G across the centre, Piraeus port and the airport.
• Santorini — strong in Fira, Oia and the airport; the caldera path between them has occasional gaps, and crowds slow Oia at sunset.
• Thessaloniki — full 5G along the waterfront and in the old town.
• Crete — Heraklion, Chania and the north-coast resorts are solid; the gorges and the south coast are patchy.
• Mykonos — good in Chora and the beach clubs; quieter northern beaches drop to weak 4G.
• Rhodes and Kos — covered in the towns and resort strips.
• Corfu — good in Corfu Town and the resorts; hill villages inland are weaker.
• Nafplio and the Peloponnese — towns covered; the mountain roads between them have gaps.

For a Greek holiday the eSIM's real advantage is continuity: one plan that keeps working as you move from Athens to a ferry to an island where the only phone shop shuts at two. A local SIM makes sense for a season's work or a long stay on one island. Roaming suits EU visitors whose allowance already covers Greece; for Indian, Gulf and American travellers, the airport SIM comparison explains why the ATH counter is rarely the best deal.

1. Buy a Greece plan above; the QR code and install details arrive by email within minutes.
2. iPhone on iOS 17.4 or later: tap the direct install link. Older iPhones: Settings › Mobile Data › Add eSIM, then scan the QR code.
3. Android: Settings › Connections (or Network & internet) › SIM manager › Add eSIM, then scan the QR or type in the SM-DP+ code.
4. Label the line Greece so you can find it quickly.
5. Turn on Data Roaming for the Greece line and switch mobile data off on your home SIM.
6. After landing at Athens, Thessaloniki, Heraklion, Rhodes, Corfu (CFU) or Santorini, choose the Greece eSIM as your data line; it connects within a minute or two, in time to confirm your transfer.
7. Validity starts at that first connection and runs for the plan's number of days, wherever in Greece you go next.

Install at home on Wi-Fi a few days before you leave; the plan only starts when the eSIM first connects in Greece, so early installation costs nothing. Keep the home SIM as your data line until you have landed. If you are flying directly to Santorini, Mykonos, Crete or Rhodes, the plan starts there. Cruise passengers should switch the eSIM on in the first Greek port; it will go quiet at sea and reconnect at each island. Arriving by ferry from Italy, the plan begins as you approach Igoumenitsa or Patras.