These figures are not individual subscribers, rather the number of connections or sims 'sold'. I myself have 3 sims, and when i went with a friend to get him a sim, they pretty much forced him to take two. He's using one and just dumped the other one at home. I heard they're looking at 200mn now, but people should be aware how they're calculating it. Not that it matters anyway.
p.s. just because a large percentage of india's massive population is using a sh!tload of free sims and data doesn't mean the country automatically becomes ultra modern and digital. the media is spinning a whole lot of nothing into fairytales. Like
this article. The title says something, but the content is some hypothetical (could be accurate too) predictions by a research firm.