How To Unlock Bootloader On Sony Xperia X (F5121/F5122)

Sony launched Xperia X in the month of May 2016. It was later released in all the market globally. Today you can Unlock Bootloader on Xperia X devices F5121/F5122. This guide is to Unlock Bootloader on Sony Xperia X, Read all the instruction carefully. Today I will teach you on How to Unlock Bootloader of Sony Xperia X using the Sony’s Dedicated Unlock Bootloader Page. Even though we have a dedicated page from Sony, it doesn’t mean you can unlock it just by tap. To Unlock the bootloader on any smartphone required patience and hard work, where you need to follow the methods. But here in our page, we offer you the step by step guide on How to unlock bootloader without taking any trouble.

Talking about the Xperia X, the smartphone has been announced with a 5.0-inch display with a resolution of 1080 x 1920 pixels. The smartphone is powered by an hexacore Qualcomm Snapdragon 650 processor, and it comes with 3GB of RAM. The phone packs 32/64GB of internal storage that can be expanded up to 256GB via a microSD card. As far as the cameras are concerned, the Sony Xperia X packs a 23-megapixel primary camera on the rear and a 16-megapixel front shooter for selfies. The Sony Xperia X came out of the box with Android Marshmallow OS, and you can upgrade to latest version, Android 7.1.1 Nougat and has a 2620 mAh non-removable battery.

How To Unlock Bootloader On Sony Xperia X (F5121/F5122)

How To Unlock Bootloader On Sony Xperia X

Did you ever wonder about the difference between locked and unlocked bootloader? Even i was a newbie when I first started my Android experience. Even I use to wonder what is Unlock Bootloader and What is locked when I begin my first experience with Android phones. Later when I learned it, I started to realize that Unlocked bootloader is like unchaining the slave who is restricted to freedom to enjoy his term. Here unlocking allows you to install mods, ROM, Kernel, etc. on your device and you can also enjoy Stock Android experience after installing the recovery on your phone.

Remember Sony has a dedicated website to unlock the bootloader, You can select Xperia X to Unlock the Bootloader. It is like same as doing the unlock procedure for all Xperia Device. Follow the Step below carefully! We have also added some screenshot with the steps.

Remember – This method is to Unlock Bootloader on Sony Xperia X, So read steps carefully.

What is Unlock Bootloader?

A Bootloader is a code which runs when we turn on our device. This code initializes some hardware and then loads the kernel and ramdisk, and gets the boot process going. So this process is known as Bootloader. The same concept applies to all the technical stuff such as Laptop, PC, Smartphones and any such device. Every Android OEM manufacturers lock the bootloader even though it is an Open Source. So if you want to try any CUSTOM ROM, it is impossible to load the CUSTOM ROM without the Unlock Bootloader. So Manufacturer made a policy of making the smartphone with Unlocked Bootloader will void the warranty. They want you to stick with the Stock ROM. Unlock Bootloader allows you to Root your android smartphone, Flash TWRP and Custom ROM in a simple, easy method.


  1. This guide is to Unlock Bootloader on Sony Xperia X F5121/F5122.
  2. Charge your phone up to 80% or 70%
  3. You will Loose warranty if you unlock bootloader
  4. Unlock Bootloader may wipe all your data, So make sure to Back up your Smartphone
  5. Make sure you have followed the steps properly. Don’t Skip and Read! – We are not responsible for any damage that you make to your phone.

What you need:

  • Official Bootloader Unlock Page from Sony: CLICK HERE
  • Now note your IMEI no by dialing *#06# or this 15-digit code can be found on your box and also at the back of the phone
  • Download Minimal ADB Tool – CLICK HERE or Download the Full ADB setup for Windows / Mac here

Steps for How to Unlock Bootloader on Sony Xperia X

  1. First of all make sure your device can be unlocked or not, To Check Follow the steps below:
    • In your device, open the dialer and enter *#*#7378423#*#* to access the service menu.
    • Tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
  2. Now Go to the official Unlock Bootloader website of Sony: CLICK HERE.
  3. Scroll down and select your device, and press Continue.Xperia Device List
  4. Now register your email.
  5. You will receive mail to confirm, Tap on “Click here to proceed”.sony email
  6. Once you enter into the Sony Unlocker page, you will be asked to enter your smartphone IMEI no, Now ENTER THE IMEI NO inside the BOX. enterimei sony
  7. You will get your unlock key once, Now Copy the unlocker key in a notepad.unlock code
  8. Now You need to enable the Developer Option on your phone.
  9. To Enable the Developer Option. – Go to your Settings -> About Phone -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled
  10. Now go to Developer option in the settings and Enable OEM unlock.oem unlock
  11. Download ADB Fastboot tool and Extract the ADB Fastboot Tool somewhere in PC (Link is given above)
  12. Now Open the Extractor ADB and Fastboot folder and Open Command Window by pressing Shift Key + Right Mouse Click.fastboot
  13. Now connect the PC to Mobile with USB Cable
  14. You need to Reboot the phone into Bootloader – Type the Command from below in your Command window that you opened
    adb reboot bootloader
  15. Your device will boot into bootloader. (If it doesn’t then, please check your Cable or ADB Drivers and Install again). Now enter the command with your unlock key after the OEM unlock and replace this character 0x07B7BFEA7AC879F0 with your unlock key
    fastboot -i 0x0fce oem unlock 0x07B7BFEA7AC879F0
  16. That’s it! You have successfully Unlock Bootloader On Sony Xperia X
  17. Now you can enjoy! Boot into system by entering the command
    fastboot reboot


  1. Beware !
    Unlocking the bootloader will erase the DRM keys contained in a special “TA” partition,
    and this is needed for some specific camera features and noise reduction.
    If you need these features, or want to be able to restore your phone to “stock” state,
    backup these DRM keys before unlocking tne bootloader (getting from another phone won’t work)…
    More at

  2. when write adb reboot boatloader the device screen is off and the notification led is blue and no thing happens when i jump to the next step the cmd says waiting for device and stays like this what sould i do

    1. I hade the same issue.
      When you are in bootloader-mode you can type: “fastboot devices” and if you don’t see your device listed then it’s probably the fastboot drivers that’s missing.
      You need to inject thous drivers manually into your phone. It’s a bit of a hassle on w10 but when done this will work just flawless.

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