Xperia XZ1, XZ1 Compact and XZ Premium receive April 2018 security patches (47.1.A.12.145) | Xperia Blog
http://www.xperiablog.net/2018/04/05/xperia-xz1-xz1-compact-and-xz-premium-receive-april-2018-security-patches-47-1-a-12-145/
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