Sony has rolled out the Android 4.4.4 Kitkat update for Xperia Z, ZR and ZL this month and the update is rolled out via OTA with 10.5.1.A.0.283 as Build Number. If you haven’t yet updated your device to Android 4.4.4 Kitkat firmware then go here and manually update your device using FTF firmware files.
Assuming that you already have updated Xperia Z, ZR, ZL to Android 4.4.4 Kitkat firmware and let’s proceed to Root Xperia Z, ZR, ZL on Android 4.4.4 Kitkat firmware. As you have updated Xperia Z, ZR, ZL to Android 4.4.4 Kitkat firmware you might have lost the Root access on your device, as the update is official it might un-root your device, so you have to root it again to gain the root access.
Once you have rooted Xperia Z, ZR, ZL then you can install Custom ROM’s, Custom Kernel’s, Download paid apps for free, remove bloatware and many more. Rooting the device provides you with more features and you can have control over apps by allowing or disabling some of the permission of the apps that you don’t want etc.
The device already received official Google latest software update.
How to Root Xperia Z, ZR, ZL:
1. Download the .230 firmware ftf file for your Xperia Z/ZR/ZL.
2. Copy the downloaded firmware ftf file to firmware folder, which can be located under the Flashtool installation directory. Open Flashtool.exe now.
3. Hit the small lightening button on the top left corner and select Flashmode and then FTF file.
4. Tap on Flash.
5. It will start preparing the firmware (kernel) for flashing. This may take a little while to load.
6. As soon as the firmware is loaded, it will prompt you to attach the phone by turning it off and keeping the back key press.
7. As soon as the phone is detected in Flashmode, the firmware will start flashing the kernel, Do not leave the Volume Down key until the process is complete.
8. As soon as you see “Flashing ended or Finished Flashing” leave the Volume Down key.
9. Download the latest One Click Root Tool and extract it.
10. From the extracted files, execute the Run.bat file now.
11. A command prompt will open up requiring you to connect your device to your PC now.
12. Follow the on-screen instructions unless your phone is rooted.