How To Root Xperia Z Android 4.2.2 Jelly Bean Official Firmware 10.3.1.A.0.244

Another stock firmware 10.3.1.A.0.244 is now available for Sony Xperia Z but unfortunately it is not the most anticipated Android 4.3 Jelly Bean. It is actually a patch to fix perf_event exploit which allow us to gain root access in the earlier 10.3.A.0.423 firmware. For those who tends to update to this new firmware from a rooted device, here is the root method developed by DooMLoRD who is the one provide easy root toolkit for our beloved Xperia Z.

If you want to keep the root access and update to the latest firmware, you may also refer to our previous post where OTA Root Keeper is to be used to restore root after the firmware update. Either ways should give you root access on Sony Xperia Z with stock Android 4.2.2 Jelly Bean 10.3.1.A.0.244 firmware. For this stage, we still have no news from DooMLoRD whether a simpler one-click-root toolkit for this latest firmware will be released soon. This guide is only applicable for Sony Xperia Z C6602/3 on 10.3.1.A.0.244, please do not try it on other Xperia model or firmware.

Sony Xperia Z is one of the latest flagship android smartphone. It is equipped with 1.5GHz quad core Qualcomm Snapdragon S4 Pro processor with GPU Adreno 320. It has 2GB RAM and internal 16GB internal storage, an additional 64GB SD card slot. Sony Xperia Z has a 5 inch TFT Full HD (1920 x 1080 pixels) display with 441 ppi pixel density. It has also an non-removable battery with NFC. Sony Xperia Z is known as of its well water-resistant and dust resistant features. It works and can stands for about 30 minutes in 3m water depth. Android 4.1.2 Jelly Bean is the stock operating system firmware out of the box, pre-installed with Sony Mobile Battery Saving Mode.

How To Root Sony Xperia Z C660X on Android 4.2.2 Jelly Ben Firmware 10.3.1.A.0.244

Disclaimer: It’s always a risk to modify your device. We, Android Teen are not responsible for any damage or bricks on your device. Your device warranty may void with any mod. Check your devices warranty’s term & conditions before start.(HTC,Samsung,LG, Sony, Motorola). Use this guide on your own risk, contact us for help if you face problem.

Pre-requisites & Requirements

  1. Sony Xperia Z with stock 10.3.1.0.244 firmware (Ensure correct device model and firmware; Check device model – Go to Settings -> About Device -> Model Number)
  2. Windows-based computer or laptop
  3. Download Sony Xperia Z USB driver for Windows and install in your computer.
  4. Connect device to computer with USB cable to complete installation.
  5. Skip this step if you have installed the USB driver.
  6. Enable USB Debugging on your device. How to Enable USB Debugging Mode on Android Devices.
  7. Make sure your phone is charged to 60% 80% to avoid battery blackout and interruption during this tutorial.
  8. We recommend you make a backup on your data and media files before the tutorial. You may restore the data and files if necessary.

Reminder: Ensure you make a backup before proceed. Besides that, ensure you meet the requirements before proceed. Contact us if you face problem.

Download

  1. Xperia Z C660X 10.3.A.0.423 Kernel (XperiaZ_C660X_KernelOnly_10.3.A.0.423_Generic_NL.ftf | 7.12 MB) – Source
  2. DooMLoRD Rooting Toolkit (DooMLoRD_Easy-Rooting-Toolkit_v18_perf-event-exploit.zip | 2.96 MB)
  3. Xperia Z C660X 10.3.1.A.0.244 Kernel (XperiaZ_C660X_KernelOnly_10.3.1.A.0.244_BE.ftf | 7.17 MB)
  4. Sony Flashtool (flashtool-0.9.11.0-windows.exe | 112.77MB)

Instructions:

  1. Download Sony flashtool into your computer. Double click on the flashtool.exe file to install. You should see a flashtool folder in C Drive.
  2. Double click on flashtool icon in the folder mentioned in Step 1 to launch flashtool.
  3. For first timer, navigate to C:\Flashtool\drivers folder to install “Flashtool-drivers”. Select and check the box of your device model and Flashmode Drivers.
  4. While your device is powered on, connect your device to computer with USB cable. Make sure all drivers are installed properly before start.
  5. Download XperiaZ_C660X_KernelOnly_10.3.A.0.423_Generic_NL.ftf and XperiaZ_C660X_KernelOnly_10.3.1.A.0.244_BE.ftf, copy to flashtool/firmwares folder in computer.
  6. On the flashtool, click on the lightning icon and click flashmode, then “ok”.
  7. You should see a new windows.
  8. At the right sidebar, check “Data, Cache, Appslog” boxes if you wish to wipe the device before flash. To remain your device data, uncheck all the boxes.
  9. At source folder, browse and choose “XperiaZ_C660X_KernelOnly_10.3.A.0.423_Generic_NL.ftf ” in the flashtool/firmwares.
  10. Press flash button to start flashing.
  11. Follow the prompt instructions.
  12. First, to unplug your device from PC.
  13. Second, power off your device.
  14. Third, enter to Flash Mode on your device by press and hold Volume Down button while connect your device with USB cable to computer.
  15. Forth, connect your device back to computer with USB cable. The screen display will still remain blank in dark.
  16. Monitor the Flashtool in computer. It should continue to run and flash the XperiaZ_C660X_KernelOnly_10.3.A.0.423_Generic_NL.ftf .
  17. Wait until the flash process to complete. You should see “Flashing finished” from the flashtool
  18. Reboot your device now.
  19. Connect your device to computer in USB debugging mode
  20. On computer, close the flashtool. This is a very important step.
  21. Download DooMLoRD_Easy-Rooting-Toolkit_v18_perf-event-exploit.zip and extract into a new folder in desktop
  22. Double click on the runme_file in the extracted folder in Step 21. This will root your device.
  23. After rooting, repeat Step 4 – 18 using XperiaZ_C660X_KernelOnly_10.3.1.A.0.244_BE.ftf. These steps will eventually flash back the stock 10.3.1.A.0.244 kernel to your device.
  24. Download root checker to check your root status.

LIKE us or give us a +1 if it works for you.

A 17 years old young tech enthusiast who loves Android and smartphone. He love to learn and share Android latest technologies to public users. He likes to play around with custom ROM flashing, customize theme, system tweaking and discussion with other developers on Android development. Now, he owns Galaxy S3, LG Optimus L5, Sony Xperia Z and pre-owned Sony Xperia P, HTC One X, LG Optimus G.
  • Poornima

    It works fine. Thanks:)

    • http://www.androidteen.com/ androidteen

      Hi, thanks for the feedback.

  • jamestan

    dun seem to work.. checked and no root access after doing the reommnded steps..not sure why? any advice? rgds jt

    • http://www.androidteen.com/ androidteen

      What is your firmware version?

  • http://www.androidteen.com/ androidteen

    we recommend to downgrade to previous firmware version and rooted using this guide http://goo.gl/l5jts Download OTA rootkeeper to update to the latest firmware. http://goo.gl/zKCijR

  • HaZiq

    Its working,thanks.I already check other place for root but this is more easier 😀 (Y)

    • http://www.androidteen.com/ androidteen

      hi, thanks for the feedback.

  • Suraj upadhyay

    My xperia z is bricked………………………….

    • http://www.androidteen.com/ androidteen

      That’s shock to us. How did you brick it?

  • Chandu Chand

    I’m getting this error while on flash tool ” For flashtool, Unknown sources and Debugging must be checked in phone settings ”

    I have already checked USB debugging ( Devloper options) and Unknown sources (Security), When i switch off and hold ” volume down ” key the flash starts and says the error.

    • http://www.androidteen.com/ androidteen

      Try to use other USB port on your computer or change another USB cable.

      • Chandu Chand

        Hey,

        Thanks for the reply, I just readed again my log its been flashed in a sec so i thought it didn’t flashed, Anyways I have successfully rooted my phone, Thanks Xda and Andriod teen 😀

        • http://www.androidteen.com/ androidteen

          Glad to heard that you have successfully rooted your device without any problem. Thanks for the feedback. Consider to Like us in Facebook or Google Plus.

  • Yassine

    I have applied this method step by step, and I am founding difficulties up to now I don’t know if my phone is rooted or no, in fact in the phone settins I found that the build number is still 10.3.1.1.0.244 and when I connect my phone to sony pc compagn it informs me that a new update is available to version 10.3.1.1.0.244 ???
    When I try to root the phone I have an error message ” build 10.3.1.1.0.244 is not supported”
    Help plz

    • http://www.androidteen.com/ androidteen

      Hi, first you need to confirm if your phone is rooted using the root checker. You can get it through the link at the bottom of this post.

      • Yassine

        The device is not rooted, the displayed message by root checker
        The device doens’t have a proper root access

        • http://www.androidteen.com/ androidteen

          ok, let start from zero. First, you connect to PC companion and update to 10.3.1.1.0.244. Then only you proceed to the root guide here.

  • Steve Szabo

    I can not open the #1 and#3 files on your list of “Download”. Can you help me please? Much obliged.
    Thank You.

  • Steve Szabo

    Hi.
    I can not open file #1and#3 on your Download list. Can you help please? Thank You.

    • http://www.androidteen.com/ androidteen

      you fail to download the file #1 & #3?

      • Steve Szabo

        The files download,but when I click on the “open” box they will not open for some reason.

  • Steve Szabo

    Hi.
    The file downloads but I can not open it.

  • Steve Szabo

    file:///C:/Users/Steve/Downloads/XperiaZ_C660X_KernelOnly_10.3.A.0.423_Generic_NL%20(6).ftf

    • http://www.androidteen.com/ androidteen

      Hi Steve, i am kind of lost. You should not open the downloaded file directly but to select the ftf file in Flashtool. Correct me if i misinterpret your message.

  • سبحان الخلاق وبحمده

    please help me my xperia z stop working the wifi plz plz help

  • سبحان الخلاق وبحمده

    iwas on the step number 6 but it dosent continue flashing and the wifi on the mobile no working plz help

    • http://www.androidteen.com/ androidteen

      make sure you have flash back the .244 kernel described in second last step.

  • سبحان الخلاق وبحمده

    what about the wifi ??? please helpppp

    • http://www.androidteen.com/ androidteen

      Hi, please refer to my reply below. make sure you have flashed .244 kernel.