The primary use case. You can upgrade or downgrade your Android version by flashing the corresponding FTF file.
If you have ever owned a Sony Xperia device, you likely know that the software experience is a double-edged sword. While Sony’s UI is clean, the desire to customize, root, or recover a "bricked" phone often leads users to a specific corner of the internet. At the center of that world sits , and specifically, version 0.9.18.6 remains one of the most significant releases in the tool's history.
Select and Fastboot Drivers from the component checklist.
However, users who require advanced features or custom flashing options may want to consider alternative tools.
If you want to root a newer Xperia that is running Android 5.x or 6.x, use Flashtool 0.9.18.6 to to an older version (such as Android 4.4.4). Then root that older system, and finally update via OTA or Xperia Companion. This two‑step process bypasses many root restrictions found in newer Android versions.
: It became famous for its clear-cut "Wipe" vs. "Exclude" checkboxes. Users learned—often the hard way—that checking "Wipe Data" was the secret to fixing bootloops, while unchecking it could save their precious photos during a minor update.
using XperiFirm . Download the firmware for your device using XperiFirm, then use Flashtool’s “Tools → Bundles → Create” menu to assemble the files into an .ftf package. As noted in many user guides, this method works well with Flashtool 0.9.18.6.