Based on the paper, the title is clickbait; it does not talk about intercepting calls at all. It does mention that one of the attacks in the paper can enable "further attacks", but if call interception was one of them, I'd imagine that they'd say so explicitly.
The author of the paper, cited in the report, said, "Any person with a little knowledge of cellular paging protocols can carry out this attack... such as phone call interception, location tracking, or targeted phishing attacks."
