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When a software update is available for your Xperia® Touch, appears in the status bar. To check the current software version, find and tap Settings → System → About phone → Build number.
- This system update's software build number is Xperia Touch: 44.3.A.0.94
- This system software update features the Android™ security patch level: September 1, 2018.
Download and install a system update from the Notification panel
- If you are using a device with multiple users, make sure you are logged in as the owner.
- Drag the status bar downwards to open the Notification panel.
- Scroll down and select the wanted system update, tap the item and then tap UPDATE.
- When the download is finished, open the Notification panel again if it is closed, then tap RESTART.