Need help forunlock sat channel with Optibox Prima

[jodank]

Hi!
Sorry if I posted this in wrong section, admin pls. move in right section if needed.

I got from a friend of mine a sat. recessive Optibox Prima.
He told me I can somehow unlock scrambled channels.

Is that true?
If yes how can I do that stuff?

He told me I have to download something to a USB stick and upload to Optibox.

I use Astra satellite if it is needed.

Thanks for any direction.

My best regards.