Before you start

Passport for prepaid registration
Personnummer and a Swedish payment method for a postpaid contract
An unlocked or eSIM-capable handset
The building's network operator, for home broadband

Step-by-step

1
Buy and register a prepaid SIM on arrival
Available in supermarkets, convenience stores and operator shops. Registration with identification has been compulsory since 2022 and can be done with a passport, which makes prepaid the one telecom product you can get before you are registered as resident.
In personWho: YouDay 1
2
Check your plan's EU roaming allowance if you cross the strait daily
Roam-like-at-home covers Denmark, so a Swedish plan works there at domestic rates — but fair-use policies exist and are designed around holidays rather than around a person who spends most working days in another country. If Copenhagen is your workplace, read the fair-use terms before you sign a Swedish contract, and consider whether a Danish number is the honest answer.
OnlineWho: You
3
Move to a contract once you have a personnummer
Postpaid plans are cheaper for the same data and run a credit check against your personnummer. Anyone carrying a record of non-payment will struggle, which is another reason the first bills matter.
OnlineWho: YouMonth 1–2
4
Check the building's broadband arrangement before ordering anything
Most Malmö apartment buildings connect through an open fibre network where you choose a service provider from the building's portal rather than ordering from an operator directly. Ordering from the wrong place is the usual cause of delay.
OnlineWho: You
5
Ask whether broadband is included in the rent
Many Swedish rental buildings include a group broadband subscription in the monthly charge at a speed that is usually plenty. Paying separately for a second connection is a common avoidable waste.
Via employerWho: Your landlord or housing association
6
Keep your number when you switch
Number portability is free and straightforward. Start the switch with the new operator and never cancel the old contract first — cancelling first releases the number and you lose it.
OnlineWho: You

Documents you’ll need

Passport, for prepaid registration
Personnummer, for a postpaid contract
Swedish bank details or card
Proof of address, for home broadband

Things most newcomers don’t know

Roam-like-at-home is built for holidays, not for a person who works in another country every day.

EU rules let a Swedish plan work in Denmark at domestic rates, and for most people that is the end of the matter. But operators apply fair-use policies keyed to where you actually spend your time, and a commuter whose handset spends forty hours a week on Danish masts is a different case from a tourist. If you will be in Copenhagen most working days, read the fair-use terms before signing rather than after the first surcharge letter.

Source: Post- och telestyrelsen

Your phone will connect to Danish networks on the shoreline and on the bridge whether you want it to or not.

Copenhagen is about fourteen kilometres across open water and radio does not respect the border. Handsets on Ribersborg beach, in Västra Hamnen and on the Öresund crossing routinely register on Danish masts. Inside the EU that is harmless; the moment you leave the EU roaming area with the same habit it is not, and it is worth knowing your phone does this.

Source: community-reported

Anonymous prepaid SIMs no longer exist in Sweden, but prepaid is still the newcomer's route in.

Registration with identification has been compulsory since 2022 and unregistered cards are blocked. The practical consequence is the opposite of how it sounds: because prepaid can be registered on a passport, it is the one telecom product available before you have a personnummer, and therefore the bridge across your first weeks.

Source: Post- och telestyrelsen

A record of non-payment will block a phone contract, and that is often how people discover they have one.

Postpaid plans run a credit check against the personnummer, and a betalningsanmärkning from an unpaid bill referred to Kronofogden causes an outright refusal. Because the record is not announced to you, a rejected phone contract is frequently the first anyone hears of it. If a contract is refused for no obvious reason, request your credit file rather than trying another operator.

Source: Kronofogden; community-reported

Common mistakes to avoid

Buying a SIM and not completing the compulsory registration, then finding it blocked.
Signing a Swedish contract for a life mostly lived in Denmark without reading the fair-use terms.
Ordering broadband from an operator when the building runs an open network portal.
Paying for a private connection when the rent already includes group broadband.
Cancelling an old contract before porting the number, and losing it.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.