Sony is now rolling out a new software update to the Xperia XZ1 and Xperia XZ1 Compact smartphones. The latest software update brings the September 2019 security patch.
The software version of this update is 47.2.A.11.228 and the size of this update is more than 400MB.
If you have this device and want to check for the update manually, just head into the Settings > System > Advanced > Software update.