# Greece travel eSIM guide > Plan mobile data in Greece with official advice on prepaid ID checks, local eSIMs, Athens Airport Wi-Fi, island ferries and EU roaming at sea. Page: https://esimnest.com/greece/guide/ A Greek number can help with calls and texts, but obtaining one involves an identity check. An existing EU plan may cover much of a land-based trip, while island ferries create a different roaming question. Check the route, phone and purchase process before choosing a connection. By eSimNest Team. Facts last checked 2026-10-02 against the sources listed at the end. ## Registering a Vodafone CU prepaid line Vodafone CU says a new prepaid SIM bought at a shop, supermarket or another sales point must be activated in the customer's name. Its instructions request an identity card or passport uploaded through a link sent by email. The card itself is therefore not the final step. A visitor buying one on arrival should keep a working internet connection and access to the email address used for registration until Vodafone confirms activation. For an online CU order, personal details must match uploaded documents or the order is cancelled. Vodafone says its courier checks the named recipient's identity at delivery, and an initial top-up is required. These conditions complicate delivery to a short-stay hotel. Ask how activation works if your passport's name order differs from the form. ## A physical data pack from Telekom Greece Telekom Greece's online shop lists a Mobile Internet SIM Only Pack, a prepaid data product on a physical SIM. The shop page could not be read by our automated checks on 2 October 2026, so this guide does not restate its allowance, validity or price: read them on the page before you order, and treat any figure quoted elsewhere as out of date until you have. Whatever the pack contains, check three things on the product page before relying on it: whether it can send and receive SMS (a data-only product may not supply a Greek texting number for reservations or verification messages), how long delivery takes and whether you can collect it at an airport, and what the activation documents are. A phone without a physical SIM slot needs a different product. ## Local eSIM choices and setup Vodafone CU describes eSIM activation over Wi-Fi using a link delivered by email or SMS. Its FAQ also describes scanning a QR code and using an eSIM alongside a physical SIM for a second number. Check the handset against Vodafone's compatibility information before paying; eSIM support alone does not establish eligibility for every product. Nova separately says eSIM is available for its FREE2GO prepaid customers and that a new customer may choose it instead of a physical card if the device supports eSIM. Nova describes Wi-Fi and a supplied QR code for installation, and directs existing customers converting a physical SIM to a Nova shop. Its page says the eSIM itself is free, but that does not mean the mobile plan or initial credit is free. Confirm the prepaid tariff, identity check and issue method with Nova before travel. ## First connection at Athens Airport Athens International Airport's archive confirms free ATH Wi-Fi inside its terminal and free web access at internet kiosks. The airport's current page was intermittently unavailable during checking, so confirm current session conditions when you land. The connection can reach an activation email, online top-up or city shop address before a local line is ready. Treat airport Wi-Fi as a setup aid rather than the only connection for the onward journey. Save your Athens address, the route from the airport and any booking reference before leaving the terminal. If an eSIM requires a QR code displayed on the same phone, arrange another screen or a printable copy in advance; the Vodafone and Nova instructions both assume access to an activation code and internet during installation. Test mobile data before heading for the metro, bus or intercity connection. ## Compare networks for islands and inland travel Greece's communications regulator EETT operates Metis, a platform for comparable information about mobile and fixed network quality. Its mobile quality indicators are more useful for comparing operators than a general claim that one network works everywhere. If the itinerary moves from Athens to a specific island, mountain village or rural road, inspect the available measurements for the places involved and ask the chosen operator about its local coverage before buying. The European Commission notes that mountains and islands can affect roaming quality even when comparable service to home should be provided where technically possible. A 4G-capable pack does not guarantee reception at a particular beach or indoors. Save maps and ferry details while connected; for a multi-island trip, compare the actual carrier's coverage. ## Connectivity on Greek ferries Hellenic Seaways says its ferries to the Saronic Islands offer free onboard Wi-Fi. For its routes to the Cyclades, Dodecanese, North Aegean and Crete, it advertises purchasable Wi-Fi packages instead. It says packages can be bought before departure on applicable routes, while listing specific vessels where advance purchase is unavailable. Check the exact vessel and sailing rather than assuming a general island Wi-Fi policy covers it. The Seamore app covers Hellenic Seaways, Blue Star Ferries, ANEK Lines and Superfast Ferries. It supports booking and web check-in, making data useful before reaching Piraeus. Complete check-in, store ticket details and download maps ashore. Onboard Wi-Fi terms vary by sailing, while a mobile connection offshore may switch to a different charging system. ## EU roaming on land and the offshore exception Greece is within the European Union's Roam Like at Home area. For an eligible EU or EEA home subscription, calls, texts and data are generally charged under the home arrangement while connected to terrestrial mobile networks, subject to the plan's applicable fair-use conditions. This can remove the need for a second plan on a short mainland visit. Travellers with a UK or other non-EU home contract must check their own operator's Greece rates; EU membership of the destination does not automatically include their contract. The European Commission draws a crucial distinction for ferry passengers: EU roaming price protections apply to terrestrial networks, including a coastal mobile signal, but not to a ship's satellite-based network offshore. A handset may connect to that network automatically, and the Commission warns that such service can be expensive. Before a long sailing, examine the phone's network name and your home operator's maritime terms, or turn off roaming and rely on a confirmed onboard Wi-Fi option. Check again on return to land. ## Emergency contact and the final phone check Greece's Ministry for Climate Crisis and Civil Protection says 112 is free and reaches the police, fire service, emergency medical service and coastguard. It says 112 can be called from a mobile even without a SIM, and it also accepts SMS and MMS. The service operates around the clock, with operators answering in Greek, English and French. A data-only eSIM's internet allowance should not be treated as a verified voice service; know the handset's emergency-calling route and keep a charged phone accessible. Before flying, check that the handset is unlocked and supports the intended SIM format. Keep a home line available for bank codes, but set the intended connection as the data line and review roaming before a ferry. Allow time for Vodafone's document check or Nova's sales process if you need a Greek number. If data is sufficient, compare local offers with our Greece plan page and test the connection before leaving Athens. Emergency calls: Many travel eSIMs carry data only, and a data-only profile may not place a normal phone call. Keep a voice-capable SIM for emergencies, such as your home SIM or a local plan, and save the local emergency number from this guide. Plans and current prices for Greece: [eSIM for Greece](https://esimnest.com/greece/). ## Questions ### Can I register a Vodafone CU prepaid SIM with a passport? Vodafone CU says a new card bought at a sales point can be activated by uploading an identity card or passport through the link it sends. Ensure the registration details match the document. ### Can a visitor choose a Greek prepaid eSIM? Vodafone CU publishes an eSIM setup route, while Nova says FREE2GO prepaid and new customers can use eSIM on compatible devices. Confirm the selected tariff and identification steps with the operator before purchase. ### Does the Telekom Mobile Internet pack supply a texting number? Its shop listing marks sending and receiving SMS as unavailable. It is a physical data pack, so choose a different product if Greek SMS is essential. ### Is Wi-Fi available at Athens International Airport? The airport's readable archive confirms free ATH Wi-Fi inside the terminal. Check the current session conditions when connecting because the live airport page could not be consistently reopened during verification. ### Will EU roaming cover a Greek island ferry? It covers an eligible subscription on terrestrial mobile networks, including where a coastal signal reaches the ship. A satellite-based onboard network falls outside EU roaming price caps, so check the network before using data offshore. ### Do Hellenic Seaways ferries have free Wi-Fi? The company says its Saronic Islands services have free onboard Wi-Fi. It offers purchasable packages on several other island routes, with advance-purchase exceptions for named vessels; check your sailing. ### What number should I use for an emergency in Greece? Call 112. Greek Civil Protection says the call is free, can connect without a SIM, and reaches the relevant police, fire, medical or coastguard service. ### What should I download before leaving Athens? Keep your ferry check-in or booking details and destination maps available, and complete any CU or Nova eSIM activation while connected to Wi-Fi. This matters most before island travel or an offshore sailing. ## Sources - [Vodafone CU: new SIM questions](https://www.vodafonecu.gr/ela-sto-cu/new-cu-sim-faqs/) - [Telekom Greece: Mobile Internet SIM Only Pack](https://www.telekom.gr/eshop/global/gadgets/productDetailsTangible.jsp?locale=en_US&productId=ger_20373370) - [Vodafone CU: eSIM activation](https://www.vodafonecu.gr/ela-sto-cu/esim-instructions/) - [Nova Greece: eSIM](https://nova.gr/esim) - [Athens International Airport: Wi-Fi and internet kiosks archive](https://archive.aia.gr/en/traveler/e-services/wifi-internet-kiosks) - [EETT: Metis network quality platform](https://metis.eett.gr/) - [European Commission: roaming questions and answers](https://digital-strategy.ec.europa.eu/en/faqs/roaming-questions-answers) - [Hellenic Seaways: WiFi onBoard](https://www.hellenicseaways.gr/en-gb/wifi-onboard) - [Hellenic Seaways: Seamore app](https://www.hellenicseaways.gr/en-gb/seamore) - [Hellenic Seaways: online booking and check-in](https://www.hellenicseaways.gr/en-gb/online-booking-web-check-in) - [Greek Civil Protection: when and how to call 112](https://civilprotection.gov.gr/en/112/pote-pos-kalo) - [Apple Support: using eSIM while travelling](https://support.apple.com/en-us/118227)