Stock Rom for Sony XPERIA X F5121 – Sony XPERIA X is Sony Mobile midrange flagship for 2016. It has quality FullHD display, powerfull Qualcomm Snapdragon 650 CPU, 3 GB RAM or 23 megapixel camera. Sony XPERIA X come with Android 6.0.1 from factory.

Today we’re gonaa flash Stock Rom for Sony XPERIA X F5121 running Android 6.0.1 – firmware 34.0.A.1.277.



  1. Download and Install FlashTool.On opening it, it may ask you to move files stored in F:\Flashtool\firmwares to F:\Users\PC NAME\.flashTool\firmware (Do move the ftf stored if asked to do so).Wait then till it syncs the devices list (if it don’t syncs because you are not connected to internet, then leave it. It is not mandatory to do sync).
    Stock Rom for Sony XPERIA X F5121Stock Rom for Sony XPERIA X F5121
  2. Download Firmware Ftf file. (link is given above)
  3. Put your above download firmware ftf in F:\Users\PC NAME\.flashTool\firmware”folderAdditional Step :- Install Drivers Install Drivers from the folder named Flashtool Drivers” in the location where Flashtool is installed OR just install PC Companion on your PC and connect your device with it and then remove it.
  4. Now Open Flashtool. See the Black Lightning Thunder icon at the top left corner. Click on it.
    Stock Rom for Sony XPERIA X F5121
  5. Now choose flashmode from BootMode Chooser.
    Stock Rom for Sony XPERIA X F5121
  6. You will now automatically see your download firmware ftf file in the firmware” section (left hand side) of Flashtool window. Select your firmware.
  7. See the right hand side of window under the Wipe tag, all three options are checked if, WILL DELETE ALL USER DATA.
    Stock Rom for Sony XPERIA X F5121
  8. If you don’t want to delete all user user data and don’t want a factory reset then you should uncheck them.Stock Rom for Sony XPERIA X F5121
    Wiping full data is recommended, though (if you have backup).
  9. Click on Flash button.
  10. After clicking on “Flash” Button in above step, now FlashTool will prepare firmware ftf selected for flashing.
    Stock Rom for Sony XPERIA X F5121
  11. Important: Now enable USB Debugging on your phone and enable unknown sources option in your Xperia device and switch it off. (if device in not dead/bricked) When prompted the notification of connecting your phone, connect it in flashmode (as chosen above) Press Volume down button and then insert usb in phone, you will see red and green light blink once, it means phone is connected in flashmode now.

    Stock Rom for Sony XPERIA X F5121As soon as phone is detected by Flashtool, flashing beings and wait till it is finished.
    WARNING: Do not cancel the process in between once flashing has started or it will result in boot loop or device not booting up at all.
    Stock Rom for Sony XPERIA X F5121Disconnect phone as soon as flashing is finished.
  12. Now reboot your phone. First reboot after the update will take some time.
  13. Now have Stock Rom installed on your Sony XPERIA X F5121.


Note: Try the above mentioned steps carefully, let us know if you are stuck anywhere.


So, this was a simple tutorial on How to Flash Stock Rom for SONY XPERIA X F5121.

Stay tuned for more updates!

Like this post? Use the buttons below to share this article with your friends on Facebook and Google Plus.