Questions & Answers about I det fallet väljer jag mobilabonnemanget.
Because Swedish main clauses usually follow the V2 rule: the finite verb comes in the second position.
Here, I det fallet is placed first, so the verb väljer has to come next:
- I det fallet väljer jag mobilabonnemanget.
If you start with the subject instead, then you get:
- Jag väljer mobilabonnemanget i det fallet.
Both are possible, but the first version gives a little more emphasis to in that case.
It is a prepositional phrase:
- i = in
- det = that
- fallet = the case
So literally it is in that case.
The noun is ett fall and in this expression fall means case/situation, not a physical fall.