The LG Fx0 / LG-L25 / Madai is a high-end consumer Firefox OS smart phone, and marks the very first Firefox OS phone release in Japan. It was released by KDDI in December 2014.

On release, the Fx0 was available to buy through standard Japanese retail channels. Being a SIM-locked device, it could only be used in Japan.

More recently (late 2015/early 2016), GSM unlocked phones became available, sold by various online shops.

Most of the information on this page comes from the good people at /r/fx0. Special thanks to Cutol for doing all the hard work porting stuff to this phone.