Low cost smartphones are the new rage. Unsurprisingly, Android leads this entirely new smartphone segment as well. And in the current context, the only player that could give Android any real competition in this segment is Firefox OS. Like Android, Firefox OS developed by Mozilla is free, open source and is based on Linux.
This is not much of a surprise since it is a well-know fact that Google uses Ubuntu (albeit with modifications) in their campuses. Not only that, it was confirmed by Canonical themselves last year that Google is a paying customer of Ubuntu Advantage program.