Root Xperia Z Ultra C6802,C6833,C6806 14.5.A.0.242 5.0.2 Lollipop Firmware

After delaying it for about two months, Sony has started seeding the Lollipop updates for Xperia Z series. Xperia Z Ultra received Android 5.0.2 Lollipop update under build number 14.5.A.0.242. Android 5.0.2 Lollipop update for Xperia Z Ultra is released for C6802, C6806 and C6833 model numbers. The Android Lollipop update for Xperia Z Ultra brings the Material design customisation to Sony’s own UI, which happens to be a pretty pleasant mixture. The 14.5.A.0.242 update for Xperia Z Ultra is one of the best and most awaited updates ever. As soon as the update was released, people rushed to their machines and starting updated their devices.

Android Power Users have to root Xperia Z Ultra 14.5.A.0.242 firmware after updating it. Unfortunately, the old rooting methods do not work with this firmware. Xperia Z Ultra can still be rooted without having to unlock the bootloader. For a Power user, this does not matter since they want to install custom ROMs and kernels and for that unlocked bootloader is required. This guide follows the method to root Xperia Z Ultra 14.5.A.0.242 firmware with one of the following model numbers; C6802, C6833 and C6806. If you have any other model number, then please do not attempt to use this guide on your device.

1. This is only for Sony Xperia Z Ultra C6802, Z Ultra C6806 and Z Ultra C6833

This rooting method is only for the device mentioned above. Make sure that your model number matches the one listed above. To do so, go to Settings > About Device on your device and see your model number. Flashing this firmware on any other device will result in bricking it so make sure that you meet this requirement first of all.

2. Battery should be charged at least over 60%.

Make sure that your battery is charged enough to complete the flashing process. In case your battery is low and your device goes dead during the flashing process, you may end up soft bricking your device as it won’t complete the flashing process.

3. Backup everything!

Just to be on the safe side, you may consider backing up each and everything from your Android device. This is highly recommended so that in case anything goes wrong, you still have the access to all of your data and you can restore it immediately. You may backup everything as listed below.

  • Backup SMS Messages
  • Backup Call Logs
  • Backup Contacts
  • Backup Media – Copy your files manually to your PC or Laptop.
  • Titanium Backup – If already rooted, use Titanium Backup to backup all of your apps, system data and other important content. If you haven’t rooted your device previously, skip this step.
  • Backup Nandroid  If CWM  or TWRP installed previously, otherwise skip this step and perform this at the end of flashing.

4. Enable USB Debugging Mode on your device.

Enable USB debugging mode on your device. To do so, tap settings>developer options>USB debugging. If you can’t find developer options in settings, then tap settings > about device and tap “Build Number” for 7 times and you’ll get em’ activated under settings.

5. Install and setup Sony Flashtool.

You must have installed Sony Flashtool. Find the full guide here.

After installing Sony Flashtool, open the Flashtool folder from the drive where you installed it. Now open Flashtool>Drivers>Flashtool-drivers.exe and install the Flashtool, Fastboot & Xperia Z Ultra drivers from the list. If you do not find the Flashtool drivers in Flashmode, skip this step and install Sony PC Companion instead, for drivers support. [Important]

6. Use OEM data cable to establish connection.

Make sure that you use the phone’s original data cable to establish connection between your phone and the PC. Using a different data cable might result in interrupting the firmware installation.

7. Unlock Bootloader

Use the following guide to unlock the bootloader of your Xperia device before proceeding.

Steps For Rooting Xperia Z Ultra 14.5.A.0.242 Firmware

1. Downgrade to .108 Firmware and Root It

  1. If you have already updated your smartphone to Android 5.0.2 Lollipop, then you have to downgrade your device to KitKat OS and Root it.
  2. Use this guide to Install .108 firmware.
  3. Root using this guide.
  4. Now Install XZ Dual Recovery.
  5. Now phone is rooted, USB Debugging must be enabled.
  6. Download latest installer for Xperia Z Ultra from here. (
  7. Connect phone to PC using OEM date cable and run install.bat.
  8. It will install the custom recovery.
  9. Now work here is done. Lets move on to next step.

2. Make A Pre-Rooted Flashable Firmware For .242 FTF

  1. Download PRF Creator and install on your system.
  2. Download SuperSU zip and place anywhere on PC.
  3. Download .242 FTF and place it anywhere on PC (The Firmware must be specific to your device).
  4. Download
  5. Now run PRFC and add all three required files in it.
  6. Then click on Create.
  7. Once the Flashable ROM is created, it will show the successful message.
  8. Do not touch any other option while creating the pre-rooted firmware.
  9. Now copy the pre-rooted firmware to the phone’s internal storage.
  10. Our work in this step is now done. Move on to next step.

Note: If you do not want to create a pre-rooted flashable zip for your device and skip few tests, then you can download the pre-rooted flashable zip from the link given below. However C6833 users will have to create their own flashable zip for now.

C6802 14.5.A.0.242 Pre-Rooted Flashable Zip | C6806 14.5.A.0.242 Pre-Rooted Flashable Zip

3. Root and Install Recovery on Z Ultra C6802/C6806/C6833 5.0.2 Lollipop Firmware

  1. Custom recovery was installed in the first step.
  2. The pre-rooted firmware was created and copied to phone in next step.
  3. Now you have to turn off phone.
  4. Turn it on again and press volume up or down repeatedly to enter custom recovery.
  5. Click on install and locate the folder where you placed the flashable zip earlier.
  6. Tap on it and install it.
  7. Now reboot the phone.
  8. If phone is still connected to PC via USB cable, disconnect it.
  9. Now go back to the .242 ftf you downloaded in second step and copy it to /flashtool/fimrwares
  10. Open flashtool and click on lightning icon in the top left.
  11. Click on it and click on flashmode.
  12. Select the .242 firmware.
  13. In the right bar, in the exclude options, exclude System only while flashing. Leave every other options as it is.
  14. While flashtool prepares the software for flashing, turn off your phone.
  15. Keep the volume down button pressed and connect it to PC via USB cable.
  16. The button must be pressed during it.
  17. The phone will enter flashmode.
  18. Flashtool will automatically detect it and start flashing.
  19. After flashing phone will reboot and you will be done 🙂
  20. That’s all 🙂 Enjoy
  21. Now your phone has a dual custom recovery, root access and of course latest Android 5.0.2 Lollipop Firmware.

Got any questions? Ask me in the comments below

Hayder Ameen

Editor at TechBeasts
+Hayder Ameen is a Computer Science student and Android is his passion. Other than that, he is a gym addict and a great sportsman.
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  • @disqus_gG8LkiWJ5o:disqus for this guide you need to unlock bootloader.

    • disqus_gG8LkiWJ5o

      Okay so you DO need to have a unlock bootloader. That’s all I needed to know. I was just about to try and flash the 4.4.4 from 5.0.2 so glad I didn’t. You should change your instructions though in case the next person doesn’t notice need to unlock bootloader to proceed. Guess I have to wait for a root for 5.0.2. Reason why I don’t want to unlock my bootloader is because I erased my ta backup by accident that why i’m trying to get back to 4.4.4 so I can root and get another ta backup to unlock my bootloader

  • Thanks you very much…. I won on Z Ultra C6833 running Lollipop 5.0.2…


    How to reboot into Recovery on Xperia Z ultra c6802? (lollipop)

  • Moazzam

    Hayder Salam. i am Moazzam from guangzhou. Dear i upgraded the phone to lollipop and it gives me continous bootloop. do you have any solutions for this. i have z ultra c6802.

    • @disqus_bXTS6aSU09:disqus flash the once again and check.

  • mr dR90ix

    step 3 so confusing….why need to flash again after step h?? on my z ultra i not flash again with flash tool and no need to unlock bootloader..what i do just Wipe data, cache & dalvik cache and

  • @disqus_fe93ylb2sw:disqus es, only if there’s any such MOD available, you can change fonts.

    • Narendra Meena

      after these steps I chane fonts

  • Ich selber nutze das Sony xperia Z Ultra Modell C 6833 ich habe Lollipop 5.0.2
    sehr schöne Anleitung nur leider nicht in Deutsch das zum einen und zum anderen würde ich gerne cynamogen aufspielen. Die Grafik wäre schön wenn die was größer wäre. Vielleicht ist hier jemand der Deutsch kann und mir hierbei behilflich sein kann. Da schon mal ein Root-Zugriff toll wäre und einige dinge von meinem Sony xperia z Ultra entfernt oder nach meinen angaben zusammen geführt werden kann und zumal das der File Commander nicht großartig nutzbar ist. Und ich von daher gerne root Zugriff hätte um Daten selber zu verschieben oder neuen ordner auf der SD karte anlegen möchte. Und das so nicht geht. Also wenn das jemand versteht und lesen kann und mir helfen kann würde mich freuen

    I myself use the Sony Xperia Z Ultra Model C 6833 I Lollipop 5.0.2
    very nice guide but unfortunately not in German on the one hand and on the other hand I’d like to play cynamogen. The graphics would be nice if the thing would be greater. Maybe someone here can the German and I can help here. Because before a root access would be great and can be a few things from my Sony Xperia Z Ultra removed or performed together after my details and especially this is the FileCommander not great usable. Wants to create and I would therefore like to root access to move data itself or new folder on the SD card. And do not go. So if someone understands and can read and can help me would be delighted

    • @carrabelloy:disqus Use google translate to translate our guide.

  • Narendra Meena

    confusion in 3rd step

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