Several models less than a year old will remain on Android 4.0 Ice Cream Sandwich.
Sony has detailed which Xperia smartphones will receive Google's Android 4.1 Jelly Bean update.
The Xperia T, Xperia TX, and Xperia V will receive the update starting in February and March, which will then be followed by the Xperia J, Xperia P and Xperia Go during the latter stages of March. The weeks following will see the Xperia S, SL, Xperia Acro S and Xperia Ion receiving the Jelly Bean update.
Sony also confirmed that several models will remain on Android 4.0 Ice Cream Sandwich, noting that "the decision has been taken not to upgrade Xperia U, Xperia miro, Xperia tipo, and Xperia sola beyond Android 4.0."
Sony, which expects to sell 50 million Xperia handsets next year, is rumored to be working on both the 5-inch Yuga and Odin Android-powered handsets.