Sony Xperia T Jelly Bean alpha ROM is official now
Not a while ago Sony posted a schedule that contains Jelly Bean update details for Sony smartphones, it was the first news that confirmed the Xperia T will receive the Android 4.1 Jelly Bean update and now the release date seems near as the Sony Xperia T Jelly Bean update has been released in alpha ROM, you can install Sony Xperia T Jelly Bean alpha ROM using the official Sony flash tool but it can used after unlocking the Xperia T bootloader using the official bootloader utility.
However if you have ability of wait, you should stay away from this update as Sony is expected to roll out the update official soon in very near future. Users reported that some wireless connectivity options are not included in the alpha update such as Bluetooth and Wi-Fi even the mobile date, there’s no Google app, Sony said that the UI has not been updated to show the final Jelly Bean firmware that you can find on the newly announced Sony Xperia Z.
Keep in mind that if you’ll unlock the bootloader to get your hands on the alpha Jelly Bean ROM, it will void the warranty of device even you’ll not be able to install update through official notification, so don’t touch if you’re not expert or if you love the warranty. But hopefully the Android development community will cook up this alpha firmware under their custom ROMs for the Xperia T. If you’re still intend to use Jelly Bean alpha ROM, head over to the official Sony page here for installation guide.