Best eSIM for Greece 2026: Athens, Santorini & Island Hopping

Greece and connectivity

The Greek mainland and popular islands have good 4G coverage. Athens, Thessaloniki, Santorini, Mykonos, Crete, and Rhodes are all well covered. Smaller islands can be spottier, especially on the far side away from the main towns. Cosmote and Vodafone Greece are the primary carriers.

Island-hopping essentials

Ferryhopper is the app for booking ferries between islands. It needs data to work and is genuinely essential for piecing together a multi-island itinerary. Download offline maps for each island before you board the ferry, because signal on boats is unreliable. Google Maps handles walking directions in island towns well, though the winding alleyways of Mykonos town will confuse any app.

Data usage

Greek island pace is relaxed. Long beach days, taverna lunches, evening walks. Data usage is typically lower than city trips. A week of island hopping uses 4 to 6 GB. Two weeks across the mainland and several islands: 8 to 12 GB is comfortable.

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