About this User Guide
This is the
Xperia™ Z Ultra User guide for the Android™ 5.1 software version. If you're
not sure which software version your device is running, you can check it via the Settings
menu. For more information about software updates, see
Updating your device
the 126 page.
To check the current software version of your device
From your Home screen, tap .
Find and tap
Settings > About phone > Android™ version.