
The firmware, conveying an assemble number 23.5.A.0.570, conveys the OS variant to the most recent 6.0.1, and incorporates the February Android security patch and additionally the most recent camera application interface.
Presently, there are the standard provisos, however. For one, just three models are getting the overhaul for the time being, particularly the D6503 Z2, the D6603 Z3 and the D5803 Z3 Compact. Moreover, it's not yet happening in all parts of the world - so far it's the US, Russia, Ukraine, Middle East and North Africa, and maybe Latin America.
So in case you're clutching your trusty Xperias of the above eras and live some place in these areas, you might be in good fortune. If not, summon some tolerance, it could be only a couple days.