Activists are worried about insufficient regulation around the new technology, amid what they say is a crackdown on dissent under Prime Minister Narendra Modi
Police quickly dispersed the group and briefly detained six people, but for Syed Faheem - who formed the WhatsApp group - it marked another successful flash protest
As a crowd of protesters swelled around them under the watchful eyes of dozens of policemen in riot gear, a cluster of young female students in burqas stood outside their university in New Delhi shouting anti-government slogans.