: If the device has Google Factory Reset Protection (FRP) enabled, you will still need the original Google account credentials after the flash to complete the setup.
If you prefer an official route, download the tool from Sony. Select Software Repair . Download D2105 Xperia Dual lock remove ftf
: Under the "Wipe" section, ensure DATA , CACHE , and APPSLOG are checked to ensure the lock is actually removed. Connect in Flash Mode : Turn off your phone completely. Hold the Volume Down button. : If the device has Google Factory Reset
Follow the prompts to reset the device. This will also remove any forgotten pattern or PIN locks. : Under the "Wipe" section, ensure DATA ,
: Go to the Flashtool installation folder (usually C:/Flashtool/drivers ), run the driver installer, and select "Flashmode Drivers" and "Fastboot Drivers".
While holding the button, connect the phone to your PC via USB. The Flashtool should detect it and begin flashing.