Greek prepaid SIMs require an in-store passport registration at COSMOTE, Vodafone, or Nova outlets — straightforward but a hassle if you're island-hopping or just want to be connected from the second you land at Athens or Heraklion. An eSIM hands you that connectivity instantly, with no queue.
- Best for
- Athens-Mykonos-Santorini classic tours; Crete and Rhodes beach holidays; Peloponnese road trips; sailing trips through the Cyclades; cruise stops at Corfu and Kefalonia.
- Networks
- Roams onto COSMOTE, Vodafone Greece, and Nova (formerly Wind). COSMOTE has the strongest reach across the more remote islands; Vodafone tends to be fastest in central Athens and Thessaloniki.
- Travel tip
- Ferry rides between the islands lose signal in open water for 30-90 minutes at a stretch — download your accommodation directions and translation app before you board, not after.