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“The common starting point is usually a message via SMS or social media, which comes from a person that you do not truly know. The relationship builds from there until it reaches that pivot point where a request for money is made,” Jardine said.

During the trial, essential functions like calls, SMS, maps and calendars will still be accessible, and pupil's phones will be checked to ensure the Blackout app is installed.

The lack of encryption in SMS messages also renders them susceptible to interception by hackers, further undermining the security of this 2FA method.

Text messaging, or SMS, has long been a phishing staple.

Sapo said the data breach in summer last year involved SMS messages calling for "revenge against Quran-burners", after several anti-Islam activists set fire to copies of the Islamic holy book.