Flashtool V0.8.6.0.

It turned a complicated Sony command-line protocol into a GUI that even a 14-year-old forum lurker could figure out. If you ever flashed CyanogenMod 10 on an Xperia 2012 device, you have Flashtool v0.8.6.0 to thank.

. Flashtool will prepare the files and then prompt you to connect your phone. your phone completely. Press and hold the Volume Down button (this is the key for Flashmode). While holding the button, plug the USB cable into your PC. Flashtool v0.8.6.0.