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 updatehas 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 rooteddevice, here is the tutorial to update Xperia Z manually to the official Android 4.2.2 Jelly Bean update.

Prerequisites to update Xperia Z to Android 4.2.2 official Jelly Bean 10.3.1A.1.10 update:

USB drivers must be installed in your computer for Sony Xperia Z.Your computer should be installed with ADB (Android Debug Bridge).Backup any important data from your Xperia Z as data loss may occur.Enable USB debugging option on your device:Settings>Applications>Development>USB debugging.Your Sony Xperia Z must be charged to at least 60% of power.

Learn to updateXperia Z to Android 4.2.2 official JB 10.3.1A.1.10 update firmware:

Required files: download the official firmware update files from hereand here- both the files are required. Also download the Flashtool app on your computer from this link.

Install the Flashtool app on your PC and then connect your Xperia Z with the computer using a USB cable.Copy both the downloaded files for official update on the Flashtool folder (c:\flashtoolfirmwares).Open flashtool on your computer and click on the lightning icon followed by flashmodeand thenselect ok.Search for the .ftffirmwares onthe flashtool folder and select the same.Now click on the flashbutton which will initiate the update process. This process may take a few minutes, please be patient and do not press any buttons during the update process.Once done, unplug the USB cord and reboot your Xperia Z.To verify, go toSettings>About Phone>Android & Baseband versionand check if the Android 4.2.2 JB 10.3.1A.1.10 update has been installed on your smart phone.

Ta da! You have successfully updated your Sony Xperia Z to official Android 4.2.2 JB firmware.