Students are flouting South Australia's new ban on mobile phones in high schools even posting tips on how to thwart the new rules, the state opposition says.
The opposition has pointed to a number of videos by students on social media, including one ridiculing the ban which has been viewed four million times.
Education spokesman John Gardner says the government's policy, which came into force this week, falls well short of the promised ban with an extremely broad range of flexible exemptions.