Du kan aktivera simkortet nu.

Du means you and is the subject of the sentence.

In Swedish, a normal main clause usually follows this basic pattern:

subject + verb + rest of sentence

So:

• Du = you
• kan = can
• aktivera simkortet nu = activate the SIM card now

Also, modern Swedish normally uses du for ordinary direct address, even in situations where English might use a more formal tone. There is no everyday formal pronoun equivalent to old-fashioned thou/ye or formal you distinctions like in some other languages.

Kan is the present tense of kunna, which usually means can, be able to, or sometimes know how to depending on context.

Here, Du kan aktivera simkortet nu means something like:

• You can activate the SIM card now
• You are now able to activate the SIM card

So kan is expressing possibility or ability.

Because after a modal verb like kan, Swedish normally uses the bare infinitive without att.

So you say:

• Du kan aktivera simkortet nu

not:

• Du kan att aktivera simkortet nu

This is similar to English:

• You can activate it
• not You can to activate it

Common Swedish modal verbs that work this way include:

• kan = can
• ska = will / am going to / shall
• vill = want to
• måste = must

Aktivera is the infinitive form, meaning to activate.

After kan, Swedish uses the infinitive without att, so aktivera stays in its basic dictionary form.

Compare:

• att aktivera = to activate
• Jag vill aktivera det = I want to activate it
• Du kan aktivera simkortet nu = You can activate the SIM card now

So the sentence is not using a present tense form like aktiverar. It is using the infinitive after the modal verb kan.

Because Swedish very often forms compound nouns as one word.

So:

• sim
  • kort → simkort

This is very normal in Swedish. English often writes similar expressions as two words, but Swedish usually joins them.

Other examples:

• mobiltelefon = mobile phone
• bankkort = bank card
• lösenord = password

So simkort is simply the standard Swedish compound noun for SIM card.

The ending -et is the definite article attached to the noun. It means the.

So:

• ett simkort = a SIM card
• simkortet = the SIM card

Swedish often puts the definite article at the end of the noun instead of using a separate word before it.

This happens because simkort is a neuter noun, an ett-word:

• ett kort = a card
• kortet = the card

Since the main part of the compound is kort, the whole word simkort is also an ett-word, so the definite singular form becomes simkortet.

Because Swedish usually marks definiteness by adding an ending to the noun.

So instead of saying:

• the SIM card

Swedish often says:

• simkortet

This ending does the job of English the.

A separate definite word can appear in some other structures, especially with adjectives:

• det nya simkortet = the new SIM card

Here you get both:

• det before the noun phrase
• -et on the noun

But in your sentence there is no adjective, so just simkortet is enough.

Nu means now, and putting it at the end is very natural in Swedish.

So:

• Du kan aktivera simkortet nu

is a completely normal word order.

But nu can move depending on emphasis:

• Nu kan du aktivera simkortet = Now you can activate the SIM card
• Du kan nu aktivera simkortet = You can now activate the SIM card
• Du kan aktivera simkortet nu = You can activate the SIM card now

All are possible, but they give slightly different focus.

Because Swedish follows the V2 rule in main clauses. That means the finite verb usually comes in the second position.

Original sentence:

• Du kan aktivera simkortet nu

If you move Nu to the front, the verb must still stay second:

• Nu kan du aktivera simkortet

Not:

• Nu du kan aktivera simkortet

This is one of the most important word-order rules in Swedish.

Not in a normal statement like this. Swedish usually requires an explicit subject.

So:

• Du kan aktivera simkortet nu = correct

But leaving out du would sound incomplete in standard Swedish.

If you want to give a command instead, you would use the imperative:

• Aktivera simkortet nu = Activate the SIM card now

So the choice depends on meaning:

• Du kan ... = you can ...
• Aktivera ... = activate ...

Usually yes in ordinary Swedish running text: simkort.

Swedish does not capitalize common nouns the way German does. However, because SIM comes from an abbreviation in English, you may also sometimes see:

• SIM-kort
• less commonly SIMkort

In everyday modern Swedish, simkort is very common and looks natural. So the spelling in your sentence is perfectly fine.

A rough guide is:

du kan aktivéra simkòrtet nu

A few helpful notes:

• Du has a front rounded vowel that is not exactly like English oo
• kan has a long a sound
• aktivera has stress on -ve-
• simkortet has the main stress on sim
• nu also has that Swedish u sound, not an English oo

A very approximate English-friendly pronunciation might be:

dyu kahn ak-tee-VEH-rah SIM-kor-tet nyu

But that is only approximate. The Swedish u sound in du and nu does not exist in standard English, so it takes practice.

Yes, depending on context.

Kan mainly means can / are able to, but in real usage it can sometimes sound close to:

• you may
• you’re allowed to
• it is now possible to

For example, in instructions on a website or app, Du kan aktivera simkortet nu often means:

• the system is ready
• you are now able to do it
• it is now available for you to do

So the exact nuance depends on the situation, even though the grammar is the same.