Update Xperia Z to Android 4.2.2 Official JB 10.3.1A.1.10 Firmware
Android 4.2.2 Jelly Bean is now officially available for the Sony Xperia Z with the latest 10.3.1A.1.10 update. This latest official update
has started rolling out in various regions, coming with Android 4.2.2 JB, its features, apps and capabilities. You may update your Sony Xperia Z via OTA; in case a manual update process is required or you have a rooted
device, here is the tutorial to update Xperia Z manually to the official Android 4.2.2 Jelly Bean update.