Mozilla, creator of the Firefox OS mobile operating system, on Sunday announced a partnership with chip maker Spreadtrum which has developed a chipset that will power smartphones priced as low as $25.

The SC6821 chipset and the resulting devices will redefine the concept of entry level when it comes to smartphones, Mozilla said at a pre-Mobile World Congress event in Barcelona.

Mozilla, which unveiled its mobile OS at this same event a year ago, also presented a raft of new Firefox-powered devices, including smartphones from ZTE and Alcatel OneTouch and an Alcatel tablet.

The Firefox platform has support from 21 operators around the globe, including new additions in the shape of Indonesian players Telkomsel and Indosat.

In the past 12 months, four operators have launched Firefox phones in 15 markets and new countries will be added in 2014, the company said. Telefonica will offer the OS in an additional eight markets this year, including seven in Central and South America plus Germany. And Deutsche Telekom will add Croatia, the Czech Republic, Macedonia and Montenegro to its Firefox footprint.