Flashtool (originally developed by Androxyde) is a Windows/Linux-based utility designed to flash firmware files (.ftf bundles) onto Sony Ericsson and Sony Xperia devices. Version 0.9.13.0 was released in mid-to-late 2014, a pivotal time when Sony transitioned from the 2011 Xperia line (Arc, Neo, Play) to the newer Xperia Z series.

flashtool --device /dev/ttyUSB0 --mode fastboot \
  --flash boot=boot.img,recovery=recovery.img,system=system.img \
  --verify --reboot system

While v0.9.13.0 is invaluable for legacy chips, for MT6765, MT6785, or any chip with ARM TrustZone, you must use:

However, for MT6572, MT6580, MT6592, MT8127, MT8382 — v0.9.13.0 remains unmatched in reliability.


The existence of tools like Flashtool highlights the tension between Digital Rights Management (DRM) and the Right to Repair.