Sony Mobile expects to launch the Android 4.1 Jelly Bean firmware update for the Xperia T (LT30p, LT30at) during the middle of Q1 2013. However, prior to this, Sony will be putting the firmware through plenty of test time. It looks like one branch of this firmware has already been discovered on GLBenchmark.
The benchmark listing clearly shows that firmware version 9.1.A.0.187 for the LT30p relates to Android 4.1.1. This means that we are likely to see a jump up from the current Xperia T ICS firmware (7.0.A.1.303) to eDream 9 which will bring Jelly Bean.
This is not the first time we’ve come across eDream 9, we also saw it pop up on the Xperia V (9.0.D.0.175). However, judging by the GLBenchmark listing for the Xperia V, it seems that the 9.0.D.0.XXX firmware is still Android 4.0.4 Ice Cream Sandwich. So we need to keep an eye out for 9.1.A.0.XXX firmware when looking for the Jelly Bean versions.
Interestingly, the recent Sony Odin leaks pointed to eDream 10 firmware (10.1.A.0.XXX) that was also Android 4.1.1 Jelly Bean. We imagine, unsurprisingly, that Sony is planning a number of software enhancements for its 2013 flagships that will not be in the JB update for the 2012 models.
Via Blog of Mobile.