BARCELONA -- The Ace, available from the Filipino carrier Cherry Mobile, costs just $23 (that's around £15 or AU$30). It runs Firefox OS, Mozilla's browser-based operating system. It's powered by a 1GHz ARM processor made by Chinese chipmaker Spreadtrum.
The Cherry Mobile Ace runs Firefox OS, which Mozilla hopes will spread its ethos of openness and help bring Net access to people who can't afford it today.
The Cherry Mobile Ace's plastic housing has rounded corners and a stippled back. On the back is a 2-megapixel camera.
The 3.5-inch 480x320-pixel screen is small and pixelated compared to today's high-end phones -- but remember that this phone costs as much as a lunch for two at a sandwich shop.
The Cherry Mobile Ace has a USB charging port on one side. It's a dual-SIM design, which is popular in developing countries where customers often subscribe to different carriers' network service for better coverage.
The Firefox OS browser-based app is most comfortable with Web apps like this one from Wikipedia. In principle, any mobile-optimized site will work fine as an app on Firefox OS.
On the top of the Cherry Mobile Ace is a 3.5mm headphone jack.
To switch between tasks, a long press on the home button calls up active apps.