You can connect your Xperia V or T to your PC using PC Companion software to check for the update, as we are not currently sure about the OTA release.
Xperia T Jelly Bean update details:
Version: 9.1.A.0.489:
Xperia V Jelly Bean update details:
Software version: 9.1.A.0.490
There is no word on the change-log, but you can expect project butter performance improvements, UI updates and Google Now on your Xperia phones after the update. We are looking for more details and will let you know as soon as we get them.

One reply on “Sony Xperia T, V Jelly Bean update roll-out begins”
To Sony, when are you planning to sell Xperia V in India?