Some Sony phones are guaranteed to get the new OS, but a number of Xperias still face uncertain KitKat futures.
The Xperia Jelly Bean update begins today for Xperia T and Xperia V owners, while Xperia TX owners will see the update next month.
Good enough for James Bond, the Xperia TX is arguably the best Xperia phone to date, but not enough to push it to top tier level.
Industry sources say Sony wants to double the amount of smartphones it ships this year and next, but profits may remain elusive.
New firmware updates for the phones add features like Screen Mirroring and upgrades to HD Voice starting Wednesday.