The Sony Xperia X Performance and Xperia XZ were both recently updated with Android Nougat (1,2). Despite being updated right at the cusp between November and December, neither of these smartphones' updates were released late enough to get the December security patches from Google. Well, now both the Xperia XZ and Xperia X Performance are getting a new update that rolls up the build number from 39.2.A.0.237 to 39.2.A.0.361. The update also brings the Sony handsets to the latest security bulletin from Google for the month of December. Currently, the update is rolling out in some...
Source: http://www.gsmarena.com/sony_xperia_xz_and_x_performance_updated_with_december_security-news-22337.php