When it comes to software updates, Sony is on the job. The company is always one of the first to release updates for its recent flagship devices and is great at updating even relatively older-generation devices quickly too. Take the Xperia Z3 Plus, Z4 Tablet, and Z5 family which were announced sometime between May 2015 and September 2015, making them nearly 2 years old. They got the update to Android Nougat 7.0 back in February and they're now following the footsteps of the XZ and X Performance and getting upped to the more recent Android 7.1.1.

The update bumps the build number from 32.3.A.2.33

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