Sony promised to roll out Android 5.0 Lollipop update on whole Xperia “Z” series handsets from early Jan 2015. Not much details are known yet of Sony’s Android 5.0 firmware whereas the very first 23.1.X.X.XXX firmware build which is expected to come on Xperia “Z3” series handsets as Android 5.0 Lollipop update is spotted at Handset Detection.
XDA user gbil posted today that Sony/D6603/D6603:5.0/23.1.X.X.XXX firmware is in testing now which is Android 5.0 Lollipop ( in past same user has posted classified info regarding future firmware updates, so it seems credible ).
Xperia Z3 series Android 5.0 23.1.X.X.XXX firmware build
23.1.A.0.75 firmware is spotted ( at HD ) running on Xperia Z3 D6603 as Android 5.0 Lollipop version.
23.1.A.0.131 firmware is spotted ( at HD ) running on Xperia Z3 Compact Tablet SGP621 as Android 5.0 Lollipop version.
Exact time frame of roll out of Android 5.0 Lollipop update is not known yet but is surely in testing now as seen from above firmware builds.
It will be great to see if Sony rolls Android 5.0 Lollipop update on any other device except “Z” series handsets like Xperia T2 Ultra, Xperia M2, Xperia C3, Xperia T3 etc.