By not serving up the Android 4.4 KitKat update to users of the Xperia SP smartphone, Sony has left many upset and disappointed. The reason being that the Xperia SP is a solid smartphone and has more than enough muscle to run an Android version like KitKat.

However, not all is lost. A member from the XDA forum 'boylush', has now come out with a Firefox OS build for the Xperia SP and it is based on CM 10.2. It happens to be relatively stable, according to XDA Developers.

While primary functions such as 3G data, messaging, calls and WiFi are all working properly, there are still a few bugs. They include:

Non-functional LTE

Bugged camera

Headphones do not work

MTP does not work

Interested in installing this port? Then download the provided ZIP package, extract and flash the boot.img, boot into recovery, flash the ZIP package, and reboot. Check out the Firefox OS port thread at XDA for more information.

For the uninitiated, the Xperia SP features a Qualcomm S4 Snapdragon SoC, with a Dual-core 1.7 GHz Krait CPU and an Adreno 320 GPU. It uses a 4.6in TFT capacitive touch screen with a resolution of 720 x 1280 pixels and a pixel density of 319 ppi. There's an 8 megapixel camera in the rear with autofocus and an LED flash. There's also a secondary VGA camera in the rear.