[See another image about this article]With this update, the June 2021 security patch will be applied. Also, even if the default of the assist application is set to “None”, the problem that the assist microphone icon is displayed on the lock screen is solved. It takes about 14 minutes to update. The updated build number is “55.2.D.0.447” for both “Xperia 1 SO-03L” and “Xperia 5 SO-01M”.