I heard about this on the radio yesterday evening.
Apparently a so-called eco campaigner called Andy Pag had been on an expedition to travel around the world in an old school bus powered by biodiesel.
He wasn't aware that using a satellite phone without permission is not only illegal in India but can be considered a terrorist act, with consequently high penalties.
The radio had an interview with a family member. Mr Pag has dual British and Italian nationality, and is being helped by the Italian consul as he was travelling on that passport.
http://www.telegraph.co.uk/news/newstopics/mps-expenses/6997320/Eco-activist-Andy-Pag-arrested-in-India.html