An open-source or official Sony-endorsed tool for flashing firmware.

v3.3 is legacy software. It is designed for older hardware architectures and will not work on modern Android smartphones. The "Vertebrae Top" Mystery semc tool v3 3 cracked vertebrae top

If you are trying to service a modern Sony device, SEMC Tool v3.3 is effectively a museum piece. Today’s technicians use more advanced, secure, and updated methods: An open-source or official Sony-endorsed tool for flashing