Modern Flashtool (0.9.x+) dropped support for very old Xperia devices (Android 2.3–4.0). Version 0.6.9.1:
Because this tool is over a decade old, . Official archives (like GitHub’s Androxyde repo) are safe. However, many .epubl misnamed files appear on sketchy forums (4shared, Mediafire, random Russian sites). These carry risks: Flashtool 0.6.9.1.epubl