How To Unroot & Restore Stock Firmware On Sony Xperia Devices

Until a few years ago, Sony wasn’t doing so good with its Xperia lineup. Sony started improving the Xperia devices in 2011, and then it was Xperia Z that came out in 2013, the device brought enough spotlight on Sony and it won Sony a lot of respect, and right now, the flagship series has stopped on Xperia Z3 that came out a few days ago. Xperia’s very nice on-board specifications packed up in a very affordable price help it to become a first choice for the users. Sony has a number of devices available under low-end, mid-range and high-end price tags, it’s quite easy to get a great Sony Xperia device in pocket now. Since the recent past, Sony has been doing great with the Software updates for its Xperia devices and that becomes a plus point for going with Sony Xperia. Unlike other manufacturers, who forget their devices after rolling out a few updates, Sony is still updating some its pretty old devices to latest and greatest version of Android at the moment. A part from the software, Xperia devices have a great design, cool and attractive build quality, these devices usually have a great camera, there’s a number of exclusive features that these devices sport. All these are the reasons that are helping Sony to win some space in the pockets of Android users.

That was a little about Sony Xperia devices, let’s get back to our purpose for being here now. Do you own any Xperia device? and you also happen to be an Android power user who loves to tweak the device to unleash its true power? Well, if that’s the case with you, you’ve probably rooted your device, flashed custom recoveries, tasted custom ROMs, a lot of mods and other tweaks. While you experiment with your device, chances are, at times you end up soft-bricking it, or some annoying error comes up that’s hard to wipe off. And at times, you only need to unroot your device and get rid of the root access, stop the functionality of the root access on your device. To be precise, you need to get your device back in its stock condition. The only way to revert back your device to its stock condition is to flash a stock firmware, while you have your device rooted, an OTA update or Sony PC Companion isn’t going to help you to get back to the stock condition, you will have to flash the firmware manually using Sony Flashtool. Although there’s a number of stock firmware guides posted on our site, and you may also find a complete guide on how to use Sony Flashtool, but a specific guide to flash the firmwares is what we are going to cook in the succeeding post.

Before we begin with the procedure, you may keep in mind that in case you’ve unlocked your device’s bootloader, then using this guide won’t re-lock it, nor it will revert back the warranty of your device, though it will wipe any custom recovery, custom kernel, root access or any mods you’ve flashed on your device. Users with the locked bootloaders will get the custom changes wiped off, and there device’s warranty remains un-affected. Let’s go through some pre-installation instructions and then unroot and install stock firmware on your Sony Xperia smartphone.

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Early Preparations:

1. This is only for Sony Xperia Smartphones!

This ROM 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.

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 & your Xperia device drivers from the list. [Important]

6. Download official Sony Xperia Firmware & create FTF file.

The next step is to get the FTF file for your desired firmware, in case you’ve already obtained the FTF, you may skip this step and just in case you haven’t, follow this guide to download official Sony Xperia Firmware & create the FTF file.

7. 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.

How To Unroot & Restore Stock Firmware On Sony Xperia Devices

  1. Before moving forward, please make sure that you’ve read the pre requisites and ensure that you are set to go ahead.
  2. Download the latest firmware and create the FTF file using the guide linked above.
  3. Copy the file and paste in Flashtool>Firmwares folder.
  4. Open Flashtool.exe now.
  5. Hit the small lightening button on the top left corner and select Flashmode.
  6. Select the FTF firmware file that you placed in the Firmware folder.
  7. From the right side, select what do you want to wipe. Data, cache and apps log, all wipes are recommended, perhaps you may select if you don’t want.
  8. Click on OK, and it will start preparing the firmware for flashing. This may take a little while to load.
  9. 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.
  10. For Xperia devices that came after 2011, Volume Down key will do the job of back key, just turn off your phone, keep the Volume Down key pressed and plug in the data cable.
  11. As soon as the phone is detected in Flashmode, the firmware will start flashing, Do not leave the Volume Down key until the process is complete.
  12. As soon as you see “Flashing ended or Finished Flashing” leave the Volume Down key, plug the cable out and reboot.
  13. That’s All! Congrats! You’ve installed latest official Android on your Xperia smartphone. Your smartphone is unrooted now and is it it’s official state. Enjoy!

In case you got any queries or face any problems regarding this guide, feel free to stop by the comment box below and let us know. We will get back to you as soon as possible. Thanks all!


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Usama M

+Usama M: Ex Farmviller | Android Fanatic | Software Engineer,Founder - TechBeasts.com
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  • Hi there. Does this work to flash back the stock version to a Cyanogen moded Xperia T2 Ultra?

  • @d_tse:disqus yes it will receive ota updates after flashing stock firmware. Best of luck 🙂

  • DGM

    1. Does this work for Xperia Pro Mk16a phones?
    2. How can i tell if i got my bootloader unlocked or not?
    3. While im doing this process can i configure my phone to have downloaded apps being installed in the SD card by default?

    The only real reason why i rooted my phone was because it’s lack of RAM memory, which was quite annoying, but now i’m getting some weird errors like for example extended apps waiting time and sometimes not even working the screen goes black. I rooted my phone with KingRoot by the way.

    4. Do you by any chance know if the unroot option in that same app is enough to have my phone unroot? And if it is will i get the original (stock) firmware of my phone back? To be honest before using KingRoot i tried other rather pointless procedure to get the phone rooted, which involved changing the phone firmware to an older one. When i changed the firmware to an older one it installed a lot weird apps i never saw before like Google Books, UEFA somethings, Starz, etc.

    Thanks for this big useful guide hope to hear from you soon and with any luck have my questions answered. 🙂

    • @disqus_Ure26Rp9lJ:disqus
      1. This will work for Xperia Pro MK16A phones, you will have to press the back key while connecting to flashtool. Rest will be the dame.
      2. To check your bootoader is locked or unlocked, checkout the code here: http://techbeasts.com/2013/12/18/how-to-unlock-bootloader-of-sony-xperia-devices-guide/
      3.No you cannot configure your phone to have apps installed on SD card by default.
      4. The unroot options will not be enough, flashing a stock firmware is recommended.
      By doing this you will have your stock firmware back and your phone will be back in its original state.

      Best of luck:)

      • DGM

        4. I know it says in this guide to use this process while the device it’s rooted but i cleared the root permission of KingRoot and also uninstalled it. Both of these steps are supposed to unroot devices and get rid of KingRoot. Is my phone still vulnerable against security risks? If so can i still use this process to fix this?

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