Mobile data in Stockholm and out into the archipelago

The city is solved. The water is the interesting part.

Stockholm is built on 14 islands and coverage across all of them is excellent — 5G is normal in the centre and there is no meaningful dead zone in the city. If your trip is Gamla Stan, Södermalm, Djurgården and the museums, you can stop worrying about signal entirely.

The archipelago is a different proposition. It runs to something like 30,000 islands out into the Baltic, and coverage follows the population: good on the routes close to the city, intermittent once you are into the outer archipelago. Ferry commuting is ordinary here, and it is normal for visitors to spend a day well beyond the last reliable bar of signal without planning to.

That is the single practical instruction on this page. If you are taking a boat out past the inner islands, download the map, the ferry timetable and anything you need to read before you leave the city. No plan on sale fixes an island with no mast.

EU and EEA visitors: buy nothing

Sweden is in the EU and roam-like-at-home applies. Your domestic allowance works in Stockholm at your home rate. Check the fair-use data cap on your own bundle, and if it covers the trip, you are finished — nothing below this line applies to you.

Buying a Swedish SIM: cheap, but bring your passport

A starter SIM is roughly $10 at airport prices, and Sweden has required prepaid SIMs to be registered against ID since August 2022 — so it is a counter transaction with a form, not a purchase off a shelf. Telia, Tele2, Telenor Sweden and Three all sell prepaid.

On price the physical SIM is still a real competitor here rather than a fallback. If you are landing at Arlanda with time to spare and want a Swedish number, take it. The case for an eSIM is convenience, pre-arrival setup and skipping the registration, rather than a price advantage at the small end.

What the eSIMs cost

The Airalo prices were read from its own site on 13 August 2026, the Nomad one from Nomad's on 18 August, and Saily's Sweden rows from Saily's own site on 18 August 2026. An earlier version of this table offered a Nomad 5 GB month as the cheaper option and called its 50 GB the cheapest gigabyte in Sweden. Neither figure had been checked and both were wrong: Nomad's 5 GB is $12.50 and its 50 GB is $45, so Airalo wins at both sizes.

Worth knowing before you default to a small plan: Sweden's ladder runs all the way to 50 GB, and that is where the value is. The verified Airalo 50 GB works out at $0.84 per gigabyte against $1.60 at 10 GB — nearly half the rate. Most Stockholm visitors do not need 50 GB, but anyone here for a month, working remotely, or tethering a laptop should look at the top of the ladder rather than the bottom. Unlimited plans exist too, priced by day: Airalo's verified unlimited runs $11.50 for 3 days to $69 for 30. The country-wide comparison is on our Sweden hub.

On host networks we have little. Holafly's own listing names no carrier — the Telia, Tele2 and Telenor trio this page used to carry against it came from our own data. Airalo, Saily and Nomad do not publish a host network for Sweden either — "Vän" on the Airalo checkout is its retail product name for the country, not a carrier. In the city this is a non-issue. If your trip is heavily archipelago-based it would be nice to know, and we don't.

Swish, SL, and what the data is actually for

Two apps matter. SL runs the Metro, trams, commuter trains and ferries; you can use an SL-kort or contactless payment, and the app is where the live timetable lives. Bolt and Uber both operate for rides.

Swish is the local payment app, and it is worth knowing that it needs a Swedish number, so it is not realistically an option on a data-only travel eSIM. This does not matter: card payments are accepted essentially everywhere in Stockholm.

Midsommar and Nobel Week

Midsommar in late June empties Stockholm of Stockholmers, who head to the countryside, while visitor numbers stay high. Expect the city to feel oddly quiet and many local businesses to be shut. Nobel Week in December is the other date that brings a large international crowd into the centre.