I don't know the state of hardware support for random low-end phones is, but Mozilla just announced that a $25 phone with Spreadtrum that is in the works: https

I don't know the state of hardware support for random low-end phones is, but Mozilla just announced that a $25 phone with Spreadtrum that is in the works: https://blog.mozilla.org/blog/2014/02/23/firefox-os-unleashes-the-future-of-mobile/ https://blog.mozilla.org/blog/2014/02/23/firefox-os-unleashe... Right now the least expensive phone you can buy right now that FirefoxOS definitely works on (that I am aware of) is the ZTE Open. There isn't any official effort from Mozilla to port to existing devices that I know of, but there is a porting guide if you want to get your hands dirty: https://developer.mozilla.org/en-US/Firefox_OS/Porting https://developer.mozilla.org/en-US/Firefox_OS/Porting I know that existing Android ROM hacking communities have made some progress too, but I personally use a phone that explicitly supports FirefoxOS (Geeksphone Keon) which I am pretty happy with. I'll probably switch to the new reference device (the Flame) once it is available, although I'm really interested in the $25 Spreadtrum model too.