Sony Flashtool 0.9.18.6
: Includes options to clear the Dalvik cache and edit system text files directly on the device. Pros & Cons High Compatibility
: Typically Xperia_Z_C6603_10.7.A.0.228_Generic_UK.ftf . The version number (10.7.A.0.228 is Android 5.1.1) indicates the build. Sony Flashtool 0.9.18.6
: Restart both PC and phone. Launch Flashtool first, then connect the phone while holding Volume Down. : Includes options to clear the Dalvik cache
: It supported almost the entire legacy Xperia lineup, from the early X10 to the Xperia Z3+ and Z4. : Restart both PC and phone
While excellent for older models like the Xperia X10, Arc, or Z series, it may struggle with the newest flagship releases which often require newer tools like Newflasher or updated Flashtool releases. Verdict
: Run the installer and navigate to the installation directory (usually C:\Flashtool ). Install Drivers : Go to C:\Flashtool\drivers and run Flashtool-drivers.exe .