But pupils are also being targeted by websites openly selling "exam cheat equipment", including concealed ear-pieces to receive information.
The official statistics on cheating in last year's A-levels and GCSEs in England will be published on Wednesday.
Last year, mobile phone use accounted for one in three cases of cheating.
As mobiles have become more sophisticated - for example, providing internet access - they have become one of the biggest problems for exam invigilators.
News Source: http://news.bbc.co.uk
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