If you're trying to or modify a specific Sony phone, please tell me the exact model and the operating system on your computer. I can give you the correct, verified workflow and links to ensure you don't compromise your machine or your phone. Releases · Androxyde/Flashtool - GitHub
Perhaps the most powerful tool in crafting extra quality romance is understanding that
: Provides a user-friendly interface to lock or unlock the device bootloader using Sony’s official unlock keys. Deconstructing the "Extra Quality" Tag
Follow the on-screen prompts. By default, the program installs directly to the root directory at C:\Flashtool . It is highly recommended to leave this path unchanged to avoid script pathing errors. Step 3: Install Xperia Drivers
Always launch the program by right-clicking Flashtool.exe (or Flashtool64.exe for 64-bit systems) and selecting to ensure it has the required system permissions to access your USB communication ports. Modern Alternatives for Xperia Maintenance