Update notifications appear in the device status bar when the update is released by the manufacturer.
To install the update, just press the notification and follow the instructions on the screen.
The system installs the update and restarts the phone,
Use the support application
Sony has a support application on Google Play to update your devices, simply download the Sony support application from Google Play.
This application controls the software updates of your device.
1.- Open the application.
2.- Click on Software, look for updates for your device.