There was a buzz about Sony Xperia SP that it will not receive the update of Kitkat 4.4. This was definitely disappointing for the Xperia users and left them flabbergasted as to “why this had to happen to the SP users!” No one could think that Sony Xperia SP could be incapable of getting this update. However, we have good news to share. You may not get the update of KitKat, but you will surely get the Firefox OS soon.
The Firefox OS for SP is not only stable, but also is based on CM 10.2. You will enjoy almost every function like messaging, 3G data, WiFi and calls. There have been issues with some bugs like camera, non-functional LTE, non-functioning MTP and also headphones are not working.
Want to install this port? Simply download the ZIP package and flash the boot.img. Then boot into recovery and flash the ZIP package. The last step is to reboot it.
Good luck! Let us know what you feel about Firefox OS.