To our knowledge, Sony is yet to iron out the kinks that recently put the Android 6.0 upgrade on hold for the Xperia Z5 in certain markets. But a trio of other Z-series devices are now getting official OTA Marshmallow goodies, signaling everything will be alright soon enough for the entire flagship family.
You’re looking at major UI makeovers for three fairly old phones, previously included in a Beta Program that allowed audacious users to test drive the latest OS iteration as a work in progress. The experiments are finally over, and a polished, hopefully stable M build is rolling out to the Xperia Z2 (model number D6503), Z3 (D6603), and Z3 Compact (D5803).
Unfortunately, other configurations and region-specific versions of the handhelds are kept waiting a little while longer, though worldwide updates must be a matter of days, weeks tops now that the ball is firmly rolling.
Bizarrely enough, the Xperia Z3 Tablet Compact that launched alongside the Z3 and Z3 Compact back in the fall of 2014 remains stuck on Lollipop. And that’s despite the Z2 already turning two years old. But Sony seems to favor seniority and commercial success over hotness, choosing to offer decent software support to its largest owner bases.
Source: Xperia Blog