Sony has released a new firmware update for all Sony Xperia T devices. It's an Android 4.3 Jelly Bean update (build number 9.2.A.0.295) and it is available via PC Companion, Sony Update Service and via Over The Air update. If you are interested what changes are included in new firmware, familiarize yourself with changelog:
Sony Xperia T 9.2.A.0.295 firmware changelog:
- Google?s Android 4.3; Jelly Bean as standard ? bringing Project Butter performance & UI response optimisation and a smoother graphical experience
- We?re also uplifting Sony?s entire native app portfolio to the latest versions ? bringing tweaked / improved / current experiences for (to name but a few): Messaging, Smart Connect, Small apps, TrackID, Sony Select and
- Sony?s Media apps: WALKMAN, Album and Movies, with Sony Entertainment Network cloud service integration* ? a more converged and full Sony entertainment experience ? Sony Entertainment Network & PlayMemories integration with a more intuitive UI, offering seamless access to both local and cloud conten
- The launch of our unique custom interface experience: ?Xperia Themes?, with downloadable UI packs from Sony Select ? more on this soon?
- The latest Android security enhancements, matched with Sony?s mobile enterprise solution:
- Battery STAMINA Mode ? updated version of Sony?s power management app, now with refreshed interface and more smart options for prolonging battery life
You can also discuss about new firmware in this thread 
Source: Sony
