Sony sent out the Pie update to the Xperia XZ2 and XZ2 Compact and has gone a step further by announcing exact dates for the XZ1, XZ1 Compact, XZ Premium, XZ2 Premium and XA2 phones' Android Pie rollout.
https://www.notebookcheck.net/Sony-announces-exact-dates-for-its-Android-Pie-rollout.338896.0.html