Samsung has launched a new update for its Galaxy A7 Smartphone (2017). As firmware version A720FXXU2BQL9 comes a security update with Android fixes for the month of December. The update currently affects units in Mexico, but will soon be available in other key markets.
Furthermore, the Sony Xperia XA received a security update from August 5 through November 6, exceeding the level of the Android update. The update has a build number of 33.3.A.1.115. Currently only models F3111 and F3113 are updated, but other variants should get it sooner rather than later.
As is often the case with OTA implementations, it may take a while for the update notification to appear on the screen of your device. So be patient.