Flashtool-0.9.18.6-windows Jun 2026

The process starts automatically once the device is detected. Do not disconnect until the log says "Flashing finished." Troubleshooting Common Issues

(2014 series and earlier, such as the Xperia Z series, Xperia X10, Arc, and Neo). Why Use This Older Version? Flashtool-0.9.18.6-windows

| Error Message | Cause | Fix | |---------------|-------|-----| | ERROR - Drivers need to be installed for connected device. | Missing or wrong USB driver | Re-run driver installer, select correct model, disable signature enforcement. | | Device connected in flash mode but not responding | Faulty USB cable or USB 3.0 port | Use USB 2.0 port, original Sony cable, and ensure battery >30%. | | java.lang.NullPointerException | Corrupt FTF or missing Java | Install JRE 8u202 (last free public update). Set JAVA_HOME path. | | Processing of system.sin finished with errors | Incompatible FTF or storage corruption | Redownload FTF. Check MD5. Flash excluding SYSTEM then flash fully again. | | fastboot: unknown command | Old fastboot binary | Replace fastboot.exe in Flashtool’s x10flasher folder with Platform Tools version. | | The bundle does not match the connected device | Wrong FTF for your model | Verify model number (e.g., C6602 vs C6603). Use XperiFirm to download correct firmware. | The process starts automatically once the device is detected