Flashtool v0.8.6.0 was released to enable Android 4.0.4 Ice Cream Sandwich updates for devices like the Sony Xperia S, requiring an existing v0.8.0.0 installation. This tool allows for flashing official stock firmware, typically requiring a USB connection while holding Volume Down to initiate Flash Mode. Read more at XperiaBlog Xperia S users – download ICS now; FTF file now available
Flashtool v0.9.x (often referred to as v0.9.18, v0.9.23, or v0.9.33) is the primary updated version used for flashing Sony Xperia smartphones. While older versions like flashtool v0860 updated
A: There is no "official" source because the update is community-generated. The safest bet is to download the original v0.8.6.0 from GitHub (as a base) and apply the driver hotfix from the XDA thread titled "[TOOL] Flashtool 0.8.6.0 Windows 10/11 Driver Fix." Flashtool v0