- Go here and check whether your smartphone is on the “unlock bootloader” list or not. If your phone is not listed there it means that you cannot use this guide for unlocking the system.
- Also, on your handset type and dial: *#*#7378423#*#*; then go to “Service info -> Configuration -> Rooting Status” and check if the “Bootloader unlock allowed” says yes. If the “no” answer will be displayed then you will not be able to unlock the bootloader of your device.
- Now, extract the file named “downloadinf.zip” (which has been downloaded before) on your computer.
- Then, copy the obtained file (“android_winusb.inf”) to path c:\android-sdk\extras\google\usb_driver.
- Click yes if asked to overwrite something.
- Type *#06# on your phone and get the IMEI number; write it down as you will need it a little bit later.
- Now, go here.
- On the first page click on “Yes, I’m sure”.
- Agree to Sony’s legal terms and then hit “I accept”.
- On the next page enter your name, email and your device’s IMEI number and click on “Submit”.
- An unlock code will now be offered; note it down.
- Turn off your device and connect the same with the computer by pressing on the Menu button (for the Xperia arc, Xperia arc S, Xperia neo, Xperia neo V, Xperia pro handsets), or on the Search button (for the Xperia Play device) or on the Volume Up button (for the Xperia mini, Xperia mini pro, Xperia ray, Xperia active, Live with Walkman, Xperia S smartphones).
- Install the drivers on the path mentioned above (c:\android-sdk\extras\google\usb_driver).
- Now, on your computer open command prompt: “start -> run -> type cmd”.
- On the cmd window enter the following commands (one at a time): cd C:\android-sdk\platform-tools; fastboot.exe -i 0x0fce getvar version; fastboot.exe -i 0x0fce oem unlock 0xKEY (replace key with the code obtained before).
- That’s all, now the bootloader will be unlocked.
- In the end, remove the USB cable and reboot your smartphone.
Alternative by using a software u can also unlock Sony all devices boot loader.
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simply intall it and use it.