: Open the application and click the "Lightning" icon, selecting "Flashmode."

Hold the button while connecting it to the PC via USB. The LED should turn green (Flashmode).

is the SoftBank Japan variant of the Sony Xperia X Performance.

If you prefer not to use third-party flash tools, you can use official software: Xperia X Performance driver | Developer World

: The tool will begin writing the firmware. Do not disconnect until the process is marked as finished. Alternative Official Recovery

: An FTF (Flash Tool Format) file is a stock firmware package used with the Sony Flashtool to reinstall the operating system, which can bypass forgotten patterns or PINs. Download and Preparation To obtain the correct firmware and tools:

: The most reliable way to find specific regional firmware is via the XperiFirm tool , which allows you to select the "