1Athens · Days 1–3
The Acropolis on the first slot of the day, the Acropolis Museum after it, and the National Archaeological Museum on day two. Filopappou Hill at sunset is free and has the view everyone queues for.
eSIM for Greece
Data for Athens, the islands and the ferries between them. One package for the whole trip, so a change of island is not a change of plan.
Choose your plan
The Greece plan covers Greece only.
1 GB7 days1.49€$1.69£1.29CHF 1.493 GB14 days3.19€$3.69£2.79CHF 3.095 GB30 days4.39€$4.99£3.79CHF 4.19Best value10 GB30 days7.89€$8.99£6.79CHF 7.4920 GB30 days13.99€$15.99£11.99CHF 13.9950 GB30 days30.99€$35.99£26.99CHF 29.99
Crossing borders?
The same 10 GB in a package that keeps working past Greece.
Europe · 10 GB · 30 daysGreece + 38 countries10.99€$12.99£9.39CHF 10.99+3.10€ vs Greece only+$4.00 vs Greece only+£2.60 vs Greece only+CHF 3.50 vs Greece only
Balkans · 10 GB · 30 daysGreece + 10 countries22.99€$26.99£19.99CHF 21.99+15.10€ vs Greece only+$18.00 vs Greece only+£13.20 vs Greece only+CHF 14.50 vs Greece only
Also on the Europe plan
38 other countries share the package with Greece. A few of them:
Good to know
What's included, when it starts, and how to get connected.
- Included countries
- The Greece plan covers Greece only.
- Local networks
- In Greece your eSIM connects to Vodafone and Nova — 4G/5G where the network offers it.
- When validity starts
- Your package starts when your phone first connects to a network at the destination — not when you install it. Crossing a border does not restart it.
- Installation and activation
- Install the eSIM while you still have internet — at home or on Wi-Fi. Installation does not start validity. If you already have a onesim eSIM installed, a new package is added to it — no second installation. Setup guide
- Calls and texts
- onesim is data-only. Calls and messages work over data in apps like WhatsApp or FaceTime; your usual SIM keeps your number.
- Support and refunds
- Message the onesim support team from the app or the website. If a package cannot be installed or used, the refund policy explains what applies. Refund policy
Route idea · Athens and one island
Five days that work.
Three days in the city and two on an island you can reach before lunch. The line below is an illustration, not a map.
1
AthensDays 1–3
2
PiraeusDay 4, morning
3
Hydra or NaxosDays 4–5
1
2Piraeus · Day 4, morning
Thirty minutes from Syntagma on metro line 1. Most ferries leave from here; Rafina, closer to the airport, serves Andros, Tinos and Mykonos. Book ahead in July and August, and check the forecast — the meltemi wind cancels the small fast boats.
3Hydra or Naxos · Days 4–5
Hydra is 90 minutes away and bans cars entirely: a stone amphitheatre of a harbour and swimming off the rocks. Naxos is three to four hours and gives you sand, a mountain interior and the cheapest good food in the Cyclades.
How the plan fits this route
The same eSIM covers the city, the port and the island, and the allowance is shared across all of them — a ferry is not a border. Greek operators change timetables at short notice and announce cancellations by SMS or in an app, which is the one part of this trip where having data on arrival genuinely matters.
Travel notes
Before you book.
The Acropolis is €30, timed, and capped at 20,000 a day.
The same price all year. In July and August the slots sell out five to seven days ahead, so book it the moment your flights are confirmed. Take the first slot of the day: the marble is cool, the light is better, and during recent heatwaves the site has closed in the early afternoon.
The wind, not the timetable, decides.
The meltemi blows through July and August and cancels sailings — mostly the small high-speed catamarans, rarely the big car ferries. Never plan a same-day ferry connection to a flight home.
Tap water is fine in Athens and often not on the islands.
Athens tap water is safe to drink. On most islands everybody drinks bottled. Tipping is rounding up rather than a percentage, and a small plate of something at the end of a meal is usually the house, not the bill.
September is the best month of the year.
The sea is at its warmest, the families have gone home after the first week, and prices drop noticeably. October is still swimming weather in Crete and the Dodecanese, but ferries and island hotels start winding down from the middle of the month.
Greece questions.
Answers about data, coverage and setup for Greece.
Coverage follows the local networks wherever they reach — cities, transport corridors and most rural areas. Remote mountain and island areas can have weaker signal on any carrier.
No. onesim is installed before you travel, with nothing to register when you land. Turn on the onesim line for mobile data and you are connected.
Installing the eSIM does not start the clock. Your package starts the first time the eSIM connects to a network in a country it covers, even while mobile data is off. Install at home over Wi-Fi and keep the onesim line switched off until you arrive; if your home country is covered too, the package would start the moment the line connects there.
Yes. Your account has one onesim eSIM, and you refill it with any regional package from anywhere in the world — from the website or the app. The new package is added to the eSIM already on your phone; there is nothing to install again.
Still unsure?Ask us