The legitimacy of "flashtool-0.9.11.0-windows.exe" largely depends on its source. Official versions of such tools are usually distributed by the device manufacturers themselves or by reputable third-party developers with permission from the device manufacturers. Users should only download and execute files from trusted sources to mitigate risks.
Being over a decade old, this version lacks support for modern Xperia devices (post-2015/2016) which require newer protocols. flashtool-0.9.11.0-windows.exe
Before unlocking:
We’re pleased to share for Windows — a stable and widely used utility for flashing firmware on Sony Xperia devices (and other compatible smartphones). The legitimacy of "flashtool-0