The Sony Xperia XA Ultra update to Android Nougat is in full motion now with the update rolling out to users. The update is version 36.1.A.0.179 and is based on Nougat 7.0. The update follows the release of the June Android Security Update for several other Xperia phones on Tuesday.
Right now the update to Android Nougat is happening in European variants of the XA Ultra but the expectation is that other country variants will see the update soon. If you have the XA Ultra, you can check for the update manually in the settings of the phone.
While Sony had indicated that the XA Ultra would at some point be seeing the Nougat update, it has taken a long time for the mid-year 2016 phone to actually see the update. While it is likely the last major update this phone will see, it is good that Sony held to their word and got the update out. And, to be fair to Sony, they have been doing pretty good by manufacture standards in getting updates out to their phone lineups.
As always, when you see that the update has hit your device, you can expect to need about 10-15 minutes to get it installed and a reboot is required.