Xperia S, SL and acro S has been certified firmware Android 4.1.2 Jelly Bean

Finally, we can begin to "count down" to wait until the firmware Android 4.1.2 Jelly Bean for official Sony Xperia S (ST26i) was launched. A new firmware version number of the build 6.2.B.0.200, recently endorsed by PTCRB - maybe this will be the version of the slightly modified firmware leaked at the end of 04 months (6.2.B. 0197).
Many predicted that this firmware version can be launched officially for download later this month.

In addition, new information says firmware update for Jelly Bean Xperia S and Xperia acro SL has been authenticated, with a similar build - 6.2.B.0.200.