Sony mobile have confirmed the roll out of JellyBean has started for the Xperia S.
Although I should imagine it'll be a while before O2 customers see it, the ball is rolling!
Personally can't wait for the ftf to appear on certain websites so i can try it!
A plea to MI5 etc, those websites you use to see what firmware has been released on what networks/regions etc.... you don't happen to know the Sony one do you??
If you want Jelly Bean now, follow this method:
The update installed without fault and just so you know, my xperia s is an o2 build and of course does not allow the bootloader to be unlocked. It is the official Sony Jelly Bean Firmware and this method to my knowledge does not void your warranty.
Track usage, upgrade and get support with the My O2 appDownload My O2