A very minor firmware update (9.1.A.1.141) has been certified by the PTCRB for the Xperia T (LT30p, LT30a) and Xperia TX (LT29i). Whilst it hasn’t appeared for the Xperia V yet, we wouldn’t be surprised to see it arrive at some point. The firmware version is likely to be a very minor update over the current Jelly Bean firmware (version number 9.1.A.1.140) for these handsets.
Thanks Silas!