Sony is now rolling out a new minor Android Nougat update 32.3.A.0.378 for Xperia Z5 series Z5, Z5 Compact, and Z5 Premium smartphones. Recently, the company released Android 7.0 Nougat update 32.3.A.0.376 to these devices.
However, there is no official change log but the update is expected to include improvements, longer battery life, bug fixes and other improvements.
If your phone hasn’t received the OTA notice yet, check manually for Nougat update 32.3.A.0.378 on Xperia Z5 series Z5, Z5 Compact, and Z5 Premium smartphones and be patient. These things take a while to reach everyone.