Mozilla has been making good headway with their Firefox OS and at this price point they could make an even bigger dent. At the MWC (Mobile World Conference) they announced a partnership with the processor chip company Spreadtrum. They are making a designs for a phone that should cost around $25! The phone has some relatively low end specs when compared to the flagship phones of today but for that price it is hard not to consider it.
Source: Engadget