Official Android 4.3 Jelly Bean for Sony Xperia SP and T isn't out yet but the firmware is already available for owners with unlocked boot loader. Leaked firmware brings the same 12.1.A.0.256 build for Xperia SP and 9.2.A.0.278 for Xperia T which are related to the recent screenshots.

Firmware leaks are courtesy from XDA member DooMLoRD who leaked the recent screenshots of the upcoming official Android 4.3 Jelly Bean update for Xperia SP and Xperia T. You can download and manually flash the Android 4.3 firmware if your smartphone has an unlocked boot loader. Moreover, DooMLoRD confirms that the firmware was for developer units and he managed to get them to boot on commercial variants.

Xperia SP Leaked Firmware

Android 4.3 leaked firmware is an internal testing version and may not bring the same features on the official final release from Sony. Some things may be added or may be removed in comparison.

It is designed for Xperia SP C5302 and C5303 models which means you cannot cross flash the ROM and kernel or suffer unforeseen consequences. There are few features which are not expected to work as well since it isn't the final release.

You need to unlock the boot loader of your Xperia SP running stock ROM version .253 or .254 Android 4.1 Jelly Bean for it to work. You also need any existing kernel with recovery to flash the update manually.

Click here for the instructions, details and screenshots.

Xperia T Leaked Firmware

DooMLoRD also provided a leaked firmware of Android 4.3 Jelly Bean for Xperia T with build number 9.2.A.0.278. The firmware provided by DooMLoRD is only flashable to Xperia T LT30p and shouldn't be flashed on any other variant to avoid bricking the smartphone.

As with Xperia SP leaked firmware, some features may appear or may not appear compared with the final release from Sony.

Your Xperia T must have an unlocked boot loader running Android 4.1 Jelly Bean stock ROM with build number ending .145. Click here for the instructions, other details and images of the leaked firmware for Xperia T.

Don't forget to create data and nAndroid backup of data files and ROM on your Xperia SP and T in case something goes wrong.

Sooner Release

Official Android 4.3 update is expected to be released very soon as leaked screenshots and testing firmware are already out. According to a comment from a Facebook account of Xperia SP, the update is going to be released on January 13 or 14 by Sony Xperia Support. Another comment also revealed that the new firmware doesn't feature TimeBurst or Motion shot but owners can install Motion Shot app manually.

Check out the Sony Xperia SP Android 4.3 screenshots via Facebook account album.