The official Jelly Bean firmware 9.1.A.0.489 is now available for Sony Xperia T. It is great great news to all the Sony Xperia T users who started to feel the joy of Jelly bean on the buttery smooth performance. In case you have not receive OTA or Sony PC Companion, we have prepared a tutorial to guide you how to install manually and upgrade your Sony Xperia T to Jelly Bean officially.