Jeg vil opsige mobilabonnementet.

In this sentence, vil is best understood as want to or intend to.

Danish ville / vil often overlaps with English will, want to, and sometimes would like to, depending on context. In Jeg vil opsige mobilabonnementet, it usually means:

• I want to cancel the mobile subscription
• or I intend to cancel the mobile subscription

So although vil often looks like English will, you should not always translate it mechanically.

Because vil is a modal verb.

After Danish modal verbs such as:

• vil = want to / will
• kan = can
• skal = must / shall
• må = may / must
• bør = should

the next verb normally appears in the bare infinitive, without at.

So:

• Jeg vil opsige mobilabonnementet = correct
• Jeg vil at opsige mobilabonnementet = incorrect

This is similar to English I can go, not I can to go.

Opsige is the verb meaning to cancel, to terminate, or to give notice on, especially for something contractual.

It is commonly used for things like:

• subscriptions
• contracts
• memberships
• jobs
• leases

So opsige is a very natural choice with abonnement.

A useful idea is:

• opsige et abonnement = cancel a subscription
• opsige en aftale = terminate an agreement
• opsige sit job = resign from one’s job

Because Danish, like German, very often forms compound nouns by writing them as one word.

Here:

• mobil = mobile
• abonnement = subscription
• mobilabonnement = mobile subscription / mobile plan

Then the definite ending is added:

• mobilabonnementet = the mobile subscription

So the whole word is built like this:

• mobil + abonnement + -et

English usually writes these ideas as separate words, but Danish often combines them into one noun.

The ending -et marks the definite form of a neuter noun.

The base noun is:

• et abonnement = a subscription

Its definite form is:

• abonnementet = the subscription

Since mobilabonnement is also a neuter noun, it becomes:

• et mobilabonnement = a mobile subscription
• mobilabonnementet = the mobile subscription

This is a very important feature of Danish: the definite article is often added as an ending instead of being a separate word.

Both patterns exist in Danish, but they are used differently.

Usually, Danish uses the noun with a definite ending by itself:

• mobilabonnementet = the mobile subscription

You use det mobilabonnement when the noun has extra description, especially an adjective or other modifier:

• det dyre mobilabonnement = the expensive mobile subscription
• det mobilabonnement, jeg har nu = the mobile subscription I have now

So in your sentence, plain mobilabonnementet is normal because there is no adjective before it.

Yes, very often that would sound natural.

Compare:

• Jeg vil opsige mobilabonnementet = I want to cancel the mobile subscription
• Jeg vil opsige mit mobilabonnement = I want to cancel my mobile subscription

If you are talking about your own phone plan, mit mobilabonnement may actually sound more personal and natural in many situations.

So both are possible, but they focus slightly differently:

• mobilabonnementet points to a specific known subscription
• mit mobilabonnement clearly says it is yours

Both are possible, but jeg vil gerne opsige mobilabonnementet is often more polite and natural in customer-service situations.

Compare:

• Jeg vil opsige mobilabonnementet = direct, clear
• Jeg vil gerne opsige mobilabonnementet = I would like to cancel the mobile subscription

Adding gerne often softens the sentence.

So if you are speaking to a company representative, Jeg vil gerne opsige mit mobilabonnement is a very good choice.

The structure is:

• Jeg = subject
• vil = finite verb
• opsige = infinitive
• mobilabonnementet = object

So the pattern is:

Subject + finite verb + infinitive + object

This is normal in a main clause with a modal verb.

If you start the sentence with something else, Danish still keeps the finite verb in second position:

• Nu vil jeg opsige mobilabonnementet = Now I want to cancel the mobile subscription

That verb-second pattern is very important in Danish.

They can all relate to cancelling, but they are not used in exactly the same situations.

• opsige: terminate something ongoing or contractual

  • opsige et abonnement
  • opsige en kontrakt

• afbestille: cancel something you ordered or booked

  • afbestille en tid
  • afbestille en rejse

• annullere: annul / cancel formally, often for a booking, transaction, or event

  • annullere en reservation
  • annullere en ordre

For a phone plan or subscription, opsige is the best and most idiomatic choice.

A few natural versions are:

• Jeg vil gerne opsige mit mobilabonnement.
• Jeg ønsker at opsige mit mobilabonnement.
• Jeg vil gerne sige mit mobilabonnement op.

That last version shows something important: opsige can also appear split in a sentence:

• Jeg vil gerne opsige mit mobilabonnement
• Jeg vil gerne sige mit mobilabonnement op

Both are correct. Danish often does this with verbs that have a prefix-like element such as op.

Because opsige belongs to a group of verbs that can appear as a single unit in the infinitive, but may split in actual sentence patterns.

So you may see:

• at opsige
• jeg opsiger
• jeg vil opsige

but also:

• jeg siger abonnementet op
• kan du sige det op?

This is something English speakers often need time to get used to. In dictionaries, you often learn the full form opsige, but in real sentences the op may move to the end.

Both of these mean essentially the same thing:

• Jeg vil opsige mobilabonnementet
• Jeg vil sige mobilabonnementet op