A new Android 7.0 Nougat firmware update is currently rolling for Sony Xperia X and Xperia X Compact owners that moves the build number from 34.2.A.0.266 to version 34.2.A.0.273. The previous update had Google security patches from 1 December 2016, so any changes in this latest release is likely to be minor bug fixes. If you’ve downloaded the update, let us know of any new changes in the comments below.
DOWNLOAD FTF Firmware Files – Build number 34.2.A.0.273 (Android 7.0 Nougat)
NOTE: You will need to update Flashtool to version 0.9.23.0 to flash Android Nougat Xperia firmware files. Further detail is here.