Best eSIM for Greece: Do You Even Need One? Island Data from €1.99, Ferries and Border Traps

Quick answer: do you need an eSIM for Greece?

It depends on where your phone plan is from.

• Plan from an EU country (or Iceland, Liechtenstein, Norway): You probably don't need one. Under the EU's "Roam like at home" rules, calls, texts and data in Greece, islands included, cost the same as at home (EU portal).
• Plan from the US, UK or elsewhere: The EU rules don't protect you, so your carrier's own roaming rates apply. UK operators no longer have to offer surcharge-free EU roaming (GOV.UK), and the FCC notes that most US domestic plans don't cover use abroad (FCC). Unless your plan already includes Greece, a travel eSIM or a local SIM is usually the cheaper way to get data.
• Travel eSIM: The eSIMFOX Greece eSIM costs from €1.99 for 1 GB (7 days); 10 GB for 30 days is €8.99. For a Greece-only trip it is cheaper than the eSIMFOX Europe eSIM (10 GB for €9.99), as of November 6, 2026.
• Greek SIM card: Nova sells a data-only prepaid SIM with 15 GB for 60 days at €15 in its stores (Nova).
• Watch out for: ferries at sea, and islands close to Turkey or Albania, where your phone can pick up a network outside the EU.

EU travelers: your home plan works in Greece

"Roam like at home" covers the EU countries plus Iceland, Liechtenstein and Norway, and also Moldova and Ukraine. In these countries you use your normal minutes, texts and data at no extra cost. Your operator should send you a text message when you start roaming (EU portal).

• Prepaid counts too. You can use your phone in other EU countries without paying extra (EU portal).
• Fair use limits: With unlimited data or a very cheap data price, your operator may limit how much data you can use while roaming (EU portal). Check your plan if you stream a lot.
• Long stays: Roam like at home is meant for travel. Your operator can check your roaming use over a 4-month period (EU portal).
• When an eSIM still makes sense for EU travelers: your plan has little data, you want a separate data line for a tablet or laptop hotspot, or you stay on an island near Turkey or on Corfu and want to avoid surprise charges from a non-EU network.

US, UK and other visitors: check your carrier first

If your SIM is from outside the EU, Greece is "international roaming" for your carrier, and the price is whatever your plan says.

• UK: Surcharge-free roaming in EU countries is no longer guaranteed. GOV.UK advises checking your operator's roaming policy before you travel. UK rules cap mobile data charges abroad at £45 per monthly billing period, with alerts at 80% and 100% of usage (GOV.UK).
• US: The FCC advises checking with your carrier that international roaming is turned on and what it costs per country. To use a local SIM, your phone must be unlocked (FCC).
• Rule of thumb: If your plan includes Greece or a cheap day pass, roaming is the easy option. Otherwise, a travel eSIM or a Greek SIM usually costs less for data.

Greek SIM card for tourists

Greece has three mobile networks: Telekom (formerly COSMOTE), Vodafone and Nova. Since September 3, 2026, the COSMOTE brand has been changing to Telekom: stores are renamed and the network name on your phone changes to TELEKOM.GR (Deutsche Telekom). This is the offer we could check on an operator's own website:

• Nova "Mobile Internet on the Go": Data only, with no calls or texts. The SIM pack is sold in Nova stores, where the package is also activated. You can buy top-ups in a store or online by card. Nova says all prices include VAT (Nova, in Greek).
• Telekom and Vodafone Greece: Their websites blocked our checks on November 6, 2026, so we can't list their tourist offers or prices here.
• ID: The Nova page doesn't list the documents needed. Bring your passport when you buy a SIM in a store.

A Greek SIM gives you a local line with plenty of data. The catch: you need to find a store after arrival, the Nova data SIM has no calls or texts, and your home number is no longer in the phone unless it supports dual SIM.

eSIMFOX Greece eSIM: prices and facts (as of November 6, 2026)

• Networks: Vodafone, Cosmote and Nova according to eSIMFOX, 4G or 5G where available. Cosmote's network now shows as TELEKOM.GR on phones.
• Validity starts with the first network connection in Greece, not when you buy. So you can install it at home.
• No ID check: eKYC (ID verification) is not required.
• Hotspot / tethering: supported (10 GB plan).
• Data only: no Greek phone number. Your home SIM stays active for calls and texts.
• Unlimited plans: After 2 GB in a day, speed drops to up to 1 Mbps; the high-speed allowance resets every 24 hours (7-day plan, 15-day plan).

Source: eSIMFOX Greece eSIM.

Greece eSIM or Europe eSIM?

If you stay in Greece, the Greece eSIM is the cheaper pick: it costs less than the eSIMFOX Europe eSIM at every size from 3 GB up, and the same for 1 GB and 7-day unlimited. The Europe eSIM is worth it if you add a trip to Turkey, Albania or other countries: its list of 38 countries includes Greece, Turkey and Albania. For the Europe eSIM, eSIMFOX names Orange, Vodafone and Movistar as networks.

Cost traps in Greece

Ferries between the islands and cruise ships

You should not pay extra to use your phone on a ship, but when mobile service on board comes via satellite, EU rules no longer apply (EU portal). Deutsche Telekom notes that cruise ships and ferries often use special satellite networks (Deutsche Telekom, in German). Turn on airplane mode at sea, or at least turn off data roaming, then turn Wi-Fi back on if you need it. Download maps and ferry tickets before you board.

Islands near Turkey: Lesbos, Kos and others

Near a border, your phone can connect to the neighboring country's network by itself. If that network is outside the EU, free EU roaming does not apply (Deutsche Telekom). On islands close to the Turkish coast, that happens:

• The European Consumer Centre Netherlands warns that on Lesbos your phone can connect to a Turkish network if it is better than the Greek one. Turkey is not in the EU, so other rules apply. Its tips: ask your provider whether non-EU networks can be blocked, choose the network yourself and set a data limit (ECC Netherlands, July 27, 2022).
• In O2 Germany's help forum, a customer reported in October 2026 that their iPhone joined a Turkish network on Kos and the bill was high. An O2 moderator replied that such misregistrations can happen in border regions, including small islands, and that O2 passes on the foreign operator's charges (O2 forum, in German).

Going on a day trip to Turkey? See best eSIM for Turkey.

Corfu near Albania

Corfu lies off the Albanian coast. In an O2 Germany forum thread from August 2025 with 86 replies, a customer on Corfu reported that the phone switched to an Albanian network at times, even with a Greek network chosen by hand (O2 forum, in German). Albania is not covered by EU roaming. More: best eSIM for Albania.

How to protect yourself

1. Set network selection to manual and pick a Greek network: Telekom (shown as TELEKOM.GR), Vodafone or Nova.
2. Watch for a welcome text from Turkey or Albania. If one arrives, you are on the wrong network.
3. Ask your provider before the trip whether it can block non-EU networks, as the ECC Netherlands suggests.
4. Or use a prepaid eSIM for data and turn off data roaming on your home SIM. Then your home SIM can't run up data charges. Calls on your home SIM can still cost money on a foreign network.

Don't rely only on spending caps: the ECC Netherlands notes that foreign providers do not always pass your data usage on to your home provider in time, so it can't warn you (ECC Netherlands).

How much data do you need in Greece?

eSIMFOX's data estimator on the Greece product page starts from about 0.5 GB per day for one device, adds a 20% reserve and rounds up. For 7 days, it suggests about 5 GB. That gives:

• Long weekend in Athens (3 days): about 2 to 3 GB, so the 3 GB plan.
• One week on Crete or Rhodes: about 5 GB, so the 5 GB plan.
• Two weeks of island hopping: about 9 GB, so the 10 GB plan.
• Lots of video, video calls or a laptop hotspot: 20 GB or an unlimited plan.

More detail by app and trip length: how much data do I need for travel in Europe?

How to set up your phone for Greece

1. Check that your phone supports eSIM and is carrier-unlocked: compatible devices.
2. EU plan: make sure roaming is enabled in your operator's app, then turn on data roaming in Greece.
3. Travel eSIM: install it at home over Wi-Fi by scanning the QR code. In Greece, choose it for cellular data and turn on data roaming for the eSIM. Keep your home SIM on for calls and texts.
4. Non-EU plan without a Greece package: turn off data roaming on your home SIM so it can't run up charges.
5. On islands near Turkey and on Corfu: manual network selection. On ferries: airplane mode on at sea.

Step-by-step screens: how to install an eSIM. No data after landing? See why is my eSIM not working?

Sources

• EU roaming, prepaid, fair use, ships and satellite: Your Europe (EU portal), checked November 6, 2026.
• UK customers: GOV.UK: using your mobile in EU and EEA countries. US customers: FCC: international roaming (last updated April 21, 2020).
• Border networks and ships: Deutsche Telekom, June 25, 2026 (in German). COSMOTE becomes Telekom: Deutsche Telekom press release, September 3, 2026.
• Turkish network on Lesbos: ECC Netherlands, July 27, 2022. Kos and Corfu: O2 Germany help forum (Kos, October 2026, Corfu, August 2025), in German.
• Local SIM: Nova "Mobile Internet on the Go" (in Greek), checked November 6, 2026.
• eSIMFOX prices and plan facts: Greece eSIM, Greece 10 GB, Greece Unlimited 7 days, Greece Unlimited 15 days, Europe eSIM, November 6, 2026.

Related guides

• Greece eSIM: all eSIMFOX plans
• Europe eSIM: 38 countries in one plan
• How much data do I need for travel in Europe?
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• Best eSIM for Albania
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• Best eSIM for France
• What is an eSIM? How it works, setup and compatibility
• How to install an eSIM on iPhone and Android