This process erases all user data including contacts, photos, and apps. Requirements:
The official Sony Support tool features a "Software Repair" option that can reset the device and remove locks. Download C2305 Xperia lock remove ftf
In the Flashtool installation folder, locate and run the Drivers installer. Ensure you select "Flashmode" and "Xperia C" drivers. This process erases all user data including contacts,