Never download executable files (.exe) claiming to be an FTF – those are malware.
: Install Sony Xperia drivers through Flashtool (found in the drivers folder of the installation directory) or use Sony PC Companion. sony c6903 lock remove ftf
Release the button once Flashtool detects the device in "Flashmode". Never download executable files (
: Note that flashing a lock-remove file typically wipes your internal user data. Step 1: Download the Sony C6903 Lock Remove FTF sony c6903 lock remove ftf
The Ghost in the Firmware