We had a quite interesting case around text spam in Norway recently. A foreign student was arrested by the Norwegian Police Security Service (PST) for allegedly

We had a quite interesting case around text spam in Norway recently. A foreign student was arrested by the Norwegian Police Security Service (PST) for allegedly spying and doing signal intelligence. What he was actually doing was driving around Oslo with an IMSI catcher, which he used to send SMS messages that tried to scam the recipient to devices that was intercepted. He had his dorm raided by the security services, was put in custody with no visitation or communication for quite some time. According to his lawyer it was quite a traumatic experience, which I can believe. The guy was likely just recruited by some foreign scammers to deliver the messages for them. In that case the carriers network wasn't even involved. Not sure how you'd stop something like that from happening.