Procedure to Unlock Boot loader of Sony Ericsson Xperia S:
- Go to Official SONY Boot loader Unlock Page from your internet browser and then at the bottom of the page, click on “Start Unlocking the Bootloader” as shown in the below screen capture.
- First, you should confirm that it is possible to unlock the boot loader of your phone by checking the service menu. In your phone, open the dialer and enter *#*#7378423#*#* to access the service menu.
- In your phone, 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.
- So, once you have verified that the bootloader is not unlocked, you need to click on “Continue” to proceed and then you will get a prompt which will prompt you, just simply accept the same and then you will need to enter the IMEI, name and email address.
- Download and unzip this file. This is the standard android_winusb.inf-file, with a few lines of code added to enable Fastboot to support Sony and Sony Ericsson devices. Make sure you are running Google USB Driver package revision 4 or higher in your Android SDK. You can see current Google USB Driver package revision in the SDK Manager.
- After this, you will get the unique unlock key which you will have to note it down somewhere safely as it can be of use in future as well. After this, you need to extract the fastboot_with_Android_USB_file.rar and open the fastboot folder.
- Now, hold the Shift key and press the right click on the background of the folder and select “Open command window here”.
- Connect your phone in fastboot mode (turn phone off, hold Volume UP button and plug in USB Cable) (Make sure drivers are installed as explained above). In the cmd windows type in the below mentioned command,
fastboot.exe -i 0x0fce getvar version
- If a value is returned (it will return 0.5), it means the phone is correctly connected. After this, type in the below mentioned command,
fastboot.exe -i 0x0fce oem unlock 0xKEY
In the above command, replace the “KEY” with the key which you have received earlier. So, after entering the key there you go, you have now successfully unlocked the bootloader of the device. Do let us know in the comments section just in case if you face any issues as we will try our level best to sort out the same.



