The two real options for a foreign visitor

When you arrive in Greece and want a local data connection, you have two practical choices beyond expensive home roaming. You can buy a physical Greek SIM card from an operator store, a kiosk or the airport, or you can install a travel eSIM that you bought online before you left. Both put you on a Greek network at local data prices, which is the whole point. The difference is in how you get there, what it costs in time and money, and how much flexibility you keep. For most travellers the eSIM wins comfortably, but there are genuine situations where a local SIM still makes sense, and this satellite lays out both honestly so you can decide rather than just taking my word for it.

Price: closer than you might think

Greek prepaid SIMs are not expensive, and the headline price of a tourist SIM with a generous data allowance can look attractive in a shop window. But the real comparison has to include your time and the friction of getting one. A travel eSIM for Greece starts from around $4 for a small bundle and scales up cheaply, and you can buy it from your sofa before you fly. A local SIM requires finding a store or kiosk, queuing, and in Greece presenting your passport because SIM registration is mandatory. By the time you factor in the taxi or walk to a store and the time spent, any small price advantage of the local SIM often evaporates, especially on a short trip. On a longer stay where you want a large monthly allowance and a Greek number, the local SIM can edge ahead on raw cost.

Convenience: where the eSIM pulls clearly ahead

This is the eSIM's strongest card. You buy it online, install it before you leave home, and arrive in Greece already connected the moment you land, with no store visit, no queue and no passport paperwork at a kiosk. There is no tiny plastic card to swap and risk losing, and your phone keeps your home SIM active alongside the eSIM, so your usual number still receives calls and verification texts. For a traveller juggling ferries and tight connections, walking off the plane already online is a genuine relief. A local SIM, by contrast, means dealing with a shop, often in a language you do not speak, swapping cards, and either losing access to your home number or carrying a loose SIM around for the trip.

Coverage and the dual SIM trick

On coverage the two are essentially tied, because a reputable travel eSIM rides on the same Greek networks a local SIM would use. The one nuance is network selection: a local SIM lets you pick exactly which operator you join, which matters if you want Cosmote specifically for its rural and island reach, whereas some travel eSIMs do not let you choose. That said, many quality eSIMs do use the strong networks, and the operators satellite explains how to check. The real advantage of the eSIM is dual SIM operation. Because your phone runs the eSIM for data and keeps your home SIM for your number, you get the best of both: cheap Greek data plus your normal number for the bank text or the verification code. With a local physical SIM you usually have to choose one or the other unless your phone has two physical slots, which most modern phones do not.

When a local SIM still wins, and the verdict

A local Greek SIM genuinely makes sense in a few cases. If you are staying for many months and want a local number for Greek services, banking or a long term contract style plan, a local SIM or a proper Greek mobile subscription is the better fit. If you need very large monthly data at the lowest possible cost and do not mind the setup, a local prepaid plan can be cheaper per gigabyte. And if your phone does not support eSIM, which applies to some older or budget models, the physical SIM is your only local option. For everyone else, which is the overwhelming majority of visitors on trips from a few days to a few weeks, the eSIM wins on convenience, keeps your home number live, costs little, and gets you connected before you even reach baggage claim. That is my verdict for a normal Greek holiday: buy the eSIM, skip the kiosk queue.

The registration and language friction of a local SIM

One underappreciated factor in the eSIM versus local SIM decision is the friction of actually buying a physical SIM in Greece. Greek law requires SIM registration, so buying a local prepaid SIM means presenting your passport and having your details recorded, which adds time and a small bureaucratic step at the point of sale. You also have to find a seller, whether an operator store, an authorised kiosk or an airport counter, and deal with the transaction often in Greek or in a hurried exchange in a busy shop. Airport SIM counters are convenient but tend to charge premium prices for tourist packages. None of this is difficult, but it is friction, and it happens at the start of your trip when you would rather be getting to your accommodation. A travel eSIM sidesteps all of it: you bought and installed it at home, there is no registration counter to visit, no passport to hand over to a kiosk, and no language barrier to navigate while jet lagged. For a short trip especially, avoiding that friction is a large part of why the eSIM wins, and it is a cost that pure price comparisons tend to ignore.

What about a Greek phone number

A genuine difference between the two options is the phone number. A local Greek SIM gives you a Greek mobile number, which can occasionally be useful for calling a Greek taxi service, confirming a local booking that wants to text you, or dealing with a Greek business that prefers a local contact. A travel eSIM is usually data only and does not give you a Greek number, though it keeps your home number alive through dual SIM. For the vast majority of travellers, a Greek number is unnecessary, because almost all communication happens over WhatsApp and other apps that use your existing identity, and bookings are confirmed by email. The cases where a local number genuinely helps are niche: long stays, dealing extensively with local services, or situations where a Greek business will only communicate by local SMS. If you anticipate needing a Greek number, a local SIM or a travel eSIM that includes a number is worth considering. If, like most visitors, you will live in WhatsApp and email, the data only eSIM with your home number preserved is all you need, and the lack of a Greek number is a non issue rather than a drawback.

The verdict for different types of traveller

Pulling the comparison together, the right choice genuinely depends on the kind of traveller you are, so here is the verdict for the common cases. For a short holiday of a few days to two weeks, which describes most visitors, the eSIM wins clearly: it is convenient, keeps your home number, costs little, needs no kiosk visit or passport registration, and gets you connected before you leave the plane. For a couple or family on a typical trip, individual eSIMs or one shared larger eSIM both beat juggling multiple physical SIMs and registrations. For a digital nomad or long stay of a month or more, a travel eSIM is ideal for the first stretch and remains a fine choice throughout, though someone settling in for many months might eventually add a local plan for the lowest per gigabyte cost on heavy use. For the rare traveller who specifically needs a Greek phone number for dealing extensively with local services, a local SIM or a number bearing plan makes sense. And for anyone whose phone does not support eSIM, the physical local SIM is the only local option. Across all these, the pattern is consistent: the eSIM is the default winner for the overwhelming majority because it removes friction and keeps your existing number, and the local SIM is the exception for specific long stay or local number needs. If you are reading this trying to decide for an ordinary Greek trip, buy the eSIM, install it at home, and skip the kiosk entirely. Beyond the headline comparison, it is worth remembering that the eSIM and a local SIM are not mutually exclusive choices you are locked into. Some travellers start a longer trip on a travel eSIM for the instant convenience of landing connected, then, if they end up staying weeks or months, add a local Greek SIM or plan once settled for the best long term value, using the eSIM as the bridge that covers the gap before they get around to the local option. This flexibility is itself a point in the eSIM's favour, because it lets you defer the decision: buy the eSIM now for certainty and convenience, and only bother with a local SIM later if your stay turns out long enough to justify it. For the great majority of trips that never reach that length, the eSIM is simply the whole answer, and the local SIM remains a theoretical option you never need. Weighing it this way removes the pressure to get the choice perfect before you travel, since the eSIM gives you a low risk, low friction starting point that you can always supplement later if circumstances change, which is exactly the kind of optionality a traveller wants when arriving somewhere new.