Best SIM Cards for Greece: Athens Internet & Data Guide (2026)
ℹ️ TL;DR: The easiest way to get data in Greece in 2026 is an eSIM from Airalo or Holafly — install before you fly, activate on landing, 5-10 GB for €5-15. EU travelers get free roaming with their home plan. For longer stays, buy a physical Cosmote or Vodafone SIM at Athens Airport (€10-20 for 5-15 GB, passport required). Mobile coverage in Athens and main tourist areas is excellent (4G/5G). I landed in Athens at midnight on my first trip, exhausted, with no data on my phone. Couldn’t pull up my hotel address, couldn’t check if the airport bus was still running, couldn’t message anyone. I ended up paying a taxi driver whatever he asked because I had no way to verify the fare. Never again.