Sony is rolling new firmware updates which add the 1 April 2020 Google Android security patches to a variety of devices. The Xperia 1 and Xperia 5 flagships get new build number 55.1.A.3.149, while the Xperia XZ2, XZ2 Compact, XZ2 Premium and XZ3 get build number 52.1.A.0.672.